diff options
255 files changed, 4976 insertions, 3540 deletions
diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX index 49c051380daf..f54273e2ac97 100644 --- a/Documentation/00-INDEX +++ b/Documentation/00-INDEX @@ -270,8 +270,6 @@ preempt-locking.txt - info on locking under a preemptive kernel. printk-formats.txt - how to get printk format specifiers right -prio_tree.txt - - info on radix-priority-search-tree use for indexing vmas. ramoops.txt - documentation of the ramoops oops/panic logging module. rbtree.txt diff --git a/Documentation/ABI/obsolete/proc-pid-oom_adj b/Documentation/ABI/obsolete/proc-pid-oom_adj deleted file mode 100644 index 9a3cb88ade47..000000000000 --- a/Documentation/ABI/obsolete/proc-pid-oom_adj +++ /dev/null @@ -1,22 +0,0 @@ -What: /proc/<pid>/oom_adj -When: August 2012 -Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's - badness heuristic used to determine which task to kill when the kernel - is out of memory. - - The badness heuristic has since been rewritten since the introduction of - this tunable such that its meaning is deprecated. The value was - implemented as a bitshift on a score generated by the badness() - function that did not have any precise units of measure. With the - rewrite, the score is given as a proportion of available memory to the - task allocating pages, so using a bitshift which grows the score - exponentially is, thus, impossible to tune with fine granularity. - - A much more powerful interface, /proc/<pid>/oom_score_adj, was - introduced with the oom killer rewrite that allows users to increase or - decrease the badness score linearly. This interface will replace - /proc/<pid>/oom_adj. - - A warning will be emitted to the kernel log if an application uses this - deprecated interface. After it is printed once, future warnings will be - suppressed until the kernel is rebooted. diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 4372e6b8a353..c07f7b4fb88d 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -18,16 +18,16 @@ from the rest of the system. The article on LWN [12] mentions some probable uses of the memory controller. The memory controller can be used to a. Isolate an application or a group of applications - Memory hungry applications can be isolated and limited to a smaller + Memory-hungry applications can be isolated and limited to a smaller amount of memory. -b. Create a cgroup with limited amount of memory, this can be used +b. Create a cgroup with a limited amount of memory; this can be used as a good alternative to booting with mem=XXXX. c. Virtualization solutions can control the amount of memory they want to assign to a virtual machine instance. d. A CD/DVD burner could control the amount of memory used by the rest of the system to ensure that burning does not fail due to lack of available memory. -e. There are several other use cases, find one or use the controller just +e. There are several other use cases; find one or use the controller just for fun (to learn and hack on the VM subsystem). Current Status: linux-2.6.34-mmotm(development version of 2010/April) @@ -38,12 +38,12 @@ Features: - optionally, memory+swap usage can be accounted and limited. - hierarchical accounting - soft limit - - moving(recharging) account at moving a task is selectable. + - moving (recharging) account at moving a task is selectable. - usage threshold notifier - oom-killer disable knob and oom-notifier - Root cgroup has no limit controls. - Kernel memory support is work in progress, and the current version provides + Kernel memory support is a work in progress, and the current version provides basically functionality. (See Section 2.7) Brief summary of control files. @@ -144,9 +144,9 @@ Figure 1 shows the important aspects of the controller 3. Each page has a pointer to the page_cgroup, which in turn knows the cgroup it belongs to -The accounting is done as follows: mem_cgroup_charge() is invoked to setup +The accounting is done as follows: mem_cgroup_charge() is invoked to set up the necessary data structures and check if the cgroup that is being charged -is over its limit. If it is then reclaim is invoked on the cgroup. +is over its limit. If it is, then reclaim is invoked on the cgroup. More details can be found in the reclaim section of this document. If everything goes well, a page meta-data-structure called page_cgroup is updated. page_cgroup has its own LRU on cgroup. @@ -163,13 +163,13 @@ for earlier. A file page will be accounted for as Page Cache when it's inserted into inode (radix-tree). While it's mapped into the page tables of processes, duplicate accounting is carefully avoided. -A RSS page is unaccounted when it's fully unmapped. A PageCache page is +An RSS page is unaccounted when it's fully unmapped. A PageCache page is unaccounted when it's removed from radix-tree. Even if RSS pages are fully unmapped (by kswapd), they may exist as SwapCache in the system until they -are really freed. Such SwapCaches also also accounted. +are really freed. Such SwapCaches are also accounted. A swapped-in page is not accounted until it's mapped. -Note: The kernel does swapin-readahead and read multiple swaps at once. +Note: The kernel does swapin-readahead and reads multiple swaps at once. This means swapped-in pages may contain pages for other tasks than a task causing page fault. So, we avoid accounting at swap-in I/O. @@ -209,7 +209,7 @@ memsw.limit_in_bytes. Example: Assume a system with 4G of swap. A task which allocates 6G of memory (by mistake) under 2G memory limitation will use all swap. In this case, setting memsw.limit_in_bytes=3G will prevent bad use of swap. -By using memsw limit, you can avoid system OOM which can be caused by swap +By using the memsw limit, you can avoid system OOM which can be caused by swap shortage. * why 'memory+swap' rather than swap. @@ -217,7 +217,7 @@ The global LRU(kswapd) can swap out arbitrary pages. Swap-out means to move account from memory to swap...there is no change in usage of memory+swap. In other words, when we want to limit the usage of swap without affecting global LRU, memory+swap limit is better than just limiting swap from -OS point of view. +an OS point of view. * What happens when a cgroup hits memory.memsw.limit_in_bytes When a cgroup hits memory.memsw.limit_in_bytes, it's useless to do swap-out @@ -236,7 +236,7 @@ an OOM routine is invoked to select and kill the bulkiest task in the cgroup. (See 10. OOM Control below.) The reclaim algorithm has not been modified for cgroups, except that -pages that are selected for reclaiming come from the per cgroup LRU +pages that are selected for reclaiming come from the per-cgroup LRU list. NOTE: Reclaim does not work for the root cgroup, since we cannot set any @@ -316,7 +316,7 @@ We can check the usage: # cat /sys/fs/cgroup/memory/0/memory.usage_in_bytes 1216512 -A successful write to this file does not guarantee a successful set of +A successful write to this file does not guarantee a successful setting of this limit to the value written into the file. This can be due to a number of factors, such as rounding up to page boundaries or the total availability of memory on the system. The user is required to re-read @@ -350,7 +350,7 @@ Trying usual test under memory controller is always helpful. 4.1 Troubleshooting Sometimes a user might find that the application under a cgroup is -terminated by OOM killer. There are several causes for this: +terminated by the OOM killer. There are several causes for this: 1. The cgroup limit is too low (just too low to do anything useful) 2. The user is using anonymous memory and swap is turned off or too low @@ -358,7 +358,7 @@ terminated by OOM killer. There are several causes for this: A sync followed by echo 1 > /proc/sys/vm/drop_caches will help get rid of some of the pages cached in the cgroup (page cache pages). -To know what happens, disable OOM_Kill by 10. OOM Control(see below) and +To know what happens, disabling OOM_Kill as per "10. OOM Control" (below) and seeing what happens will be helpful. 4.2 Task migration @@ -399,10 +399,10 @@ About use_hierarchy, see Section 6. Almost all pages tracked by this memory cgroup will be unmapped and freed. Some pages cannot be freed because they are locked or in-use. Such pages are - moved to parent(if use_hierarchy==1) or root (if use_hierarchy==0) and this + moved to parent (if use_hierarchy==1) or root (if use_hierarchy==0) and this cgroup will be empty. - Typical use case of this interface is that calling this before rmdir(). + The typical use case for this interface is before calling rmdir(). Because rmdir() moves all pages to parent, some out-of-use page caches can be moved to the parent. If you want to avoid that, force_empty will be useful. @@ -486,7 +486,7 @@ You can reset failcnt by writing 0 to failcnt file. For efficiency, as other kernel components, memory cgroup uses some optimization to avoid unnecessary cacheline false sharing. usage_in_bytes is affected by the -method and doesn't show 'exact' value of memory(and swap) usage, it's an fuzz +method and doesn't show 'exact' value of memory (and swap) usage, it's a fuzz value for efficient access. (Of course, when necessary, it's synchronized.) If you want to know more exact memory usage, you should use RSS+CACHE(+SWAP) value in memory.stat(see 5.2). @@ -496,8 +496,8 @@ value in memory.stat(see 5.2). This is similar to numa_maps but operates on a per-memcg basis. This is useful for providing visibility into the numa locality information within an memcg since the pages are allowed to be allocated from any physical -node. One of the usecases is evaluating application performance by -combining this information with the application's cpu allocation. +node. One of the use cases is evaluating application performance by +combining this information with the application's CPU allocation. We export "total", "file", "anon" and "unevictable" pages per-node for each memcg. The ouput format of memory.numa_stat is: @@ -561,10 +561,10 @@ are pushed back to their soft limits. If the soft limit of each control group is very high, they are pushed back as much as possible to make sure that one control group does not starve the others of memory. -Please note that soft limits is a best effort feature, it comes with +Please note that soft limits is a best-effort feature; it comes with no guarantees, but it does its best to make sure that when memory is heavily contended for, memory is allocated based on the soft limit -hints/setup. Currently soft limit based reclaim is setup such that +hints/setup. Currently soft limit based reclaim is set up such that it gets invoked from balance_pgdat (kswapd). 7.1 Interface @@ -592,7 +592,7 @@ page tables. 8.1 Interface -This feature is disabled by default. It can be enabled(and disabled again) by +This feature is disabled by default. It can be enabledi (and disabled again) by writing to memory.move_charge_at_immigrate of the destination cgroup. If you want to enable it: @@ -601,8 +601,8 @@ If you want to enable it: Note: Each bits of move_charge_at_immigrate has its own meaning about what type of charges should be moved. See 8.2 for details. -Note: Charges are moved only when you move mm->owner, IOW, a leader of a thread - group. +Note: Charges are moved only when you move mm->owner, in other words, + a leader of a thread group. Note: If we cannot find enough space for the task in the destination cgroup, we try to make space by reclaiming memory. Task migration may fail if we cannot make enough space. @@ -612,25 +612,25 @@ And if you want disable it again: # echo 0 > memory.move_charge_at_immigrate -8.2 Type of charges which can be move +8.2 Type of charges which can be moved -Each bits of move_charge_at_immigrate has its own meaning about what type of -charges should be moved. But in any cases, it must be noted that an account of -a page or a swap can be moved only when it is charged to the task's current(old) -memory cgroup. +Each bit in move_charge_at_immigrate has its own meaning about what type of +charges should be moved. But in any case, it must be noted that an account of +a page or a swap can be moved only when it is charged to the task's current +(old) memory cgroup. bit | what type of charges would be moved ? -----+------------------------------------------------------------------------ - 0 | A charge of an anonymous page(or swap of it) used by the target task. - | You must enable Swap Extension(see 2.4) to enable move of swap charges. + 0 | A charge of an anonymous page (or swap of it) used by the target task. + | You must enable Swap Extension (see 2.4) to enable move of swap charges. -----+------------------------------------------------------------------------ - 1 | A charge of file pages(normal file, tmpfs file(e.g. ipc shared memory) + 1 | A charge of file pages (normal file, tmpfs file (e.g. ipc shared memory) | and swaps of tmpfs file) mmapped by the target task. Unlike the case of - | anonymous pages, file pages(and swaps) in the range mmapped by the task + | anonymous pages, file pages (and swaps) in the range mmapped by the task | will be moved even if the task hasn't done page fault, i.e. they might | not be the task's "RSS", but other task's "RSS" that maps the same file. - | And mapcount of the page is ignored(the page can be moved even if - | page_mapcount(page) > 1). You must enable Swap Extension(see 2.4) to + | And mapcount of the page is ignored (the page can be moved even if + | page_mapcount(page) > 1). You must enable Swap Extension (see 2.4) to | enable move of swap charges. 8.3 TODO @@ -640,11 +640,11 @@ memory cgroup. 9. Memory thresholds -Memory cgroup implements memory thresholds using cgroups notification +Memory cgroup implements memory thresholds using the cgroups notification API (see cgroups.txt). It allows to register multiple memory and memsw thresholds and gets notifications when it crosses. -To register a threshold application need: +To register a threshold, an application must: - create an eventfd using eventfd(2); - open memory.usage_in_bytes or memory.memsw.usage_in_bytes; - write string like "<event_fd> <fd of memory.usage_in_bytes> <threshold>" to @@ -659,24 +659,24 @@ It's applicable for root and non-root cgroup. memory.oom_control file is for OOM notification and other controls. -Memory cgroup implements OOM notifier using cgroup notification +Memory cgroup implements OOM notifier using the cgroup notification API (See cgroups.txt). It allows to register multiple OOM notification delivery and gets notification when OOM happens. -To register a notifier, application need: +To register a notifier, an application must: - create an eventfd using eventfd(2) - open memory.oom_control file - write string like "<event_fd> <fd of memory.oom_control>" to cgroup.event_control -Application will be notified through eventfd when OOM happens. -OOM notification doesn't work for root cgroup. +The application will be notified through eventfd when OOM happens. +OOM notification doesn't work for the root cgroup. -You can disable OOM-killer by writing "1" to memory.oom_control file, as: +You can disable the OOM-killer by writing "1" to memory.oom_control file, as: #echo 1 > memory.oom_control -This operation is only allowed to the top cgroup of sub-hierarchy. +This operation is only allowed to the top cgroup of a sub-hierarchy. If OOM-killer is disabled, tasks under cgroup will hang/sleep in memory cgroup's OOM-waitqueue when they request accountable memory. diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index fb0a6aeb936c..a1793d670cd0 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -33,7 +33,7 @@ Table of Contents 2 Modifying System Parameters 3 Per-Process Parameters - 3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj - Adjust the oom-killer + 3.1 /proc/<pid>/oom_score_adj - Adjust the oom-killer score 3.2 /proc/<pid>/oom_score - Display current oom-killer score 3.3 /proc/<pid>/io - Display the IO accounting fields @@ -1320,10 +1320,10 @@ of the kernel. CHAPTER 3: PER-PROCESS PARAMETERS ------------------------------------------------------------------------------ -3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj- Adjust the oom-killer score +3.1 /proc/<pid>/oom_score_adj- Adjust the oom-killer score -------------------------------------------------------------------------------- -These file can be used to adjust the badness heuristic used to select which +This file can be used to adjust the badness heuristic used to select which process gets killed in out of memory conditions. The badness heuristic assigns a value to each candidate task ranging from 0 @@ -1361,22 +1361,10 @@ same system, cpuset, mempolicy, or memory controller resources to use at least equivalent to discounting 50% of the task's allowed memory from being considered as scoring against the task. -For backwards compatibility with previous kernels, /proc/<pid>/oom_adj may also -be used to tune the badness score. Its acceptable values range from -16 -(OOM_ADJUST_MIN) to +15 (OOM_ADJUST_MAX) and a special value of -17 -(OOM_DISABLE) to disable oom killing entirely for that task. Its value is -scaled linearly with /proc/<pid>/oom_score_adj. - -Writing to /proc/<pid>/oom_score_adj or /proc/<pid>/oom_adj will change the -other with its scaled value. - The value of /proc/<pid>/oom_score_adj may be reduced no lower than the last value set by a CAP_SYS_RESOURCE process. To reduce the value any lower requires CAP_SYS_RESOURCE. -NOTICE: /proc/<pid>/oom_adj is deprecated and will be removed, please see -Documentation/feature-removal-schedule.txt. - Caveat: when a parent task is selected, the oom killer will sacrifice any first generation children with separate address spaces instead, if possible. This avoids servers and important system daemons from being killed and loses the @@ -1387,9 +1375,7 @@ minimal amount of work. ------------------------------------------------------------- This file can be used to check the current score used by the oom-killer is for -any given <pid>. Use it together with /proc/<pid>/oom_adj to tune which -process should be killed in an out-of-memory situation. - +any given <pid>. 3.3 /proc/<pid>/io - Display the IO accounting fields ------------------------------------------------------- diff --git a/Documentation/memory.txt b/Documentation/memory.txt deleted file mode 100644 index 802efe58647c..000000000000 --- a/Documentation/memory.txt +++ /dev/null @@ -1,33 +0,0 @@ -There are several classic problems related to memory on Linux -systems. - - 1) There are some motherboards that will not cache above - a certain quantity of memory. If you have one of these - motherboards, your system will be SLOWER, not faster - as you add more memory. Consider exchanging your - motherboard. - -All of these problems can be addressed with the "mem=XXXM" boot option -(where XXX is the size of RAM to use in megabytes). -It can also tell Linux to use less memory than is actually installed. -If you use "mem=" on a machine with PCI, consider using "memmap=" to avoid -physical address space collisions. - -See the documentation of your boot loader (LILO, grub, loadlin, etc.) about -how to pass options to the kernel. - -There are other memory problems which Linux cannot deal with. Random -corruption of memory is usually a sign of serious hardware trouble. -Try: - - * Reducing memory settings in the BIOS to the most conservative - timings. - - * Adding a cooling fan. - - * Not overclocking your CPU. - - * Having the memory tested in a memory tester or exchanged - with the vendor. Consider testing it with memtest86 yourself. - - * Exchanging your CPU, cache, or motherboard for one that works. diff --git a/Documentation/prio_tree.txt b/Documentation/prio_tree.txt deleted file mode 100644 index 3aa68f9a117b..000000000000 --- a/Documentation/prio_tree.txt +++ /dev/null @@ -1,107 +0,0 @@ -The prio_tree.c code indexes vmas using 3 different indexes: - * heap_index = vm_pgoff + vm_size_in_pages : end_vm_pgoff - * radix_index = vm_pgoff : start_vm_pgoff - * size_index = vm_size_in_pages - -A regular radix-priority-search-tree indexes vmas using only heap_index and -radix_index. The conditions for indexing are: - * ->heap_index >= ->left->heap_index && - ->heap_index >= ->right->heap_index - * if (->heap_index == ->left->heap_index) - then ->radix_index < ->left->radix_index; - * if (->heap_index == ->right->heap_index) - then ->radix_index < ->right->radix_index; - * nodes are hashed to left or right subtree using radix_index - similar to a pure binary radix tree. - -A regular radix-priority-search-tree helps to store and query -intervals (vmas). However, a regular radix-priority-search-tree is only -suitable for storing vmas with different radix indices (vm_pgoff). - -Therefore, the prio_tree.c extends the regular radix-priority-search-tree -to handle many vmas with the same vm_pgoff. Such vmas are handled in -2 different ways: 1) All vmas with the same radix _and_ heap indices are -linked using vm_set.list, 2) if there are many vmas with the same radix -index, but different heap indices and if the regular radix-priority-search -tree cannot index them all, we build an overflow-sub-tree that indexes such -vmas using heap and size indices instead of heap and radix indices. For -example, in the figure below some vmas with vm_pgoff = 0 (zero) are -indexed by regular radix-priority-search-tree whereas others are pushed -into an overflow-subtree. Note that all vmas in an overflow-sub-tree have -the same vm_pgoff (radix_index) and if necessary we build different -overflow-sub-trees to handle each possible radix_index. For example, -in figure we have 3 overflow-sub-trees corresponding to radix indices -0, 2, and 4. - -In the final tree the first few (prio_tree_root->index_bits) levels -are indexed using heap and radix indices whereas the overflow-sub-trees below -those levels (i.e. levels prio_tree_root->index_bits + 1 and higher) are -indexed using heap and size indices. In overflow-sub-trees the size_index -is used for hashing the nodes to appropriate places. - -Now, an example prio_tree: - - vmas are represented [radix_index, size_index, heap_index] - i.e., [start_vm_pgoff, vm_size_in_pages, end_vm_pgoff] - -level prio_tree_root->index_bits = 3 ------ - _ - 0 [0,7,7] | - / \ | - ------------------ ------------ | Regular - / \ | radix priority - 1 [1,6,7] [4,3,7] | search tree - / \ / \ | - ------- ----- ------ ----- | heap-and-radix - / \ / \ | indexed - 2 [0,6,6] [2,5,7] [5,2,7] [6,1,7] | - / \ / \ / \ / \ | - 3 [0,5,5] [1,5,6] [2,4,6] [3,4,7] [4,2,6] [5,1,6] [6,0,6] [7,0,7] | - / / / _ - / / / _ - 4 [0,4,4] [2,3,5] [4,1,5] | - / / / | - 5 [0,3,3] [2,2,4] [4,0,4] | Overflow-sub-trees - / / | - 6 [0,2,2] [2,1,3] | heap-and-size - / / | indexed - 7 [0,1,1] [2,0,2] | - / | - 8 [0,0,0] | - _ - -Note that we use prio_tree_root->index_bits to optimize the height -of the heap-and-radix indexed tree. Since prio_tree_root->index_bits is -set according to the maximum end_vm_pgoff mapped, we are sure that all -bits (in vm_pgoff) above prio_tree_root->index_bits are 0 (zero). Therefore, -we only use the first prio_tree_root->index_bits as radix_index. -Whenever index_bits is increased in prio_tree_expand, we shuffle the tree -to make sure that the first prio_tree_root->index_bits levels of the tree -is indexed properly using heap and radix indices. - -We do not optimize the height of overflow-sub-trees using index_bits. -The reason is: there can be many such overflow-sub-trees and all of -them have to be suffled whenever the index_bits increases. This may involve -walking the whole prio_tree in prio_tree_insert->prio_tree_expand code -path which is not desirable. Hence, we do not optimize the height of the -heap-and-size indexed overflow-sub-trees using prio_tree->index_bits. -Instead the overflow sub-trees are indexed using full BITS_PER_LONG bits -of size_index. This may lead to skewed sub-trees because most of the -higher significant bits of the size_index are likely to be 0 (zero). In -the example above, all 3 overflow-sub-trees are skewed. This may marginally -affect the performance. However, processes rarely map many vmas with the -same start_vm_pgoff but different end_vm_pgoffs. Therefore, we normally -do not require overflow-sub-trees to index all vmas. - -From the above discussion it is clear that the maximum height of -a prio_tree can be prio_tree_root->index_bits + BITS_PER_LONG. -However, in most of the common cases we do not need overflow-sub-trees, -so the tree height in the common cases will be prio_tree_root->index_bits. - -It is fair to mention here that the prio_tree_root->index_bits -is increased on demand, however, the index_bits is not decreased when -vmas are removed from the prio_tree. That's tricky to do. Hence, it's -left as a home work problem. - - diff --git a/Documentation/rbtree.txt b/Documentation/rbtree.txt index 8d32d85a5234..61b6c48871a0 100644 --- a/Documentation/rbtree.txt +++ b/Documentation/rbtree.txt @@ -193,24 +193,55 @@ Example: Support for Augmented rbtrees ----------------------------- -Augmented rbtree is an rbtree with "some" additional data stored in each node. -This data can be used to augment some new functionality to rbtree. -Augmented rbtree is an optional feature built on top of basic rbtree -infrastructure. An rbtree user who wants this feature will have to call the -augmentation functions with the user provided augmentation callback -when inserting and erasing nodes. - -On insertion, the user must call rb_augment_insert() once the new node is in -place. This will cause the augmentation function callback to be called for -each node between the new node and the root which has been affected by the -insertion. - -When erasing a node, the user must call rb_augment_erase_begin() first to -retrieve the deepest node on the rebalance path. Then, after erasing the -original node, the user must call rb_augment_erase_end() with the deepest -node found earlier. This will cause the augmentation function to be called -for each affected node between the deepest node and the root. - +Augmented rbtree is an rbtree with "some" additional data stored in +each node, where the additional data for node N must be a function of +the contents of all nodes in the subtree rooted at N. This data can +be used to augment some new functionality to rbtree. Augmented rbtree +is an optional feature built on top of basic rbtree infrastructure. +An rbtree user who wants this feature will have to call the augmentation +functions with the user provided augmentation callback when inserting +and erasing nodes. + +C files implementing augmented rbtree manipulation must include +<linux/rbtree_augmented.h> instead of <linus/rbtree.h>. Note that +linux/rbtree_augmented.h exposes some rbtree implementations details +you are not expected to rely on; please stick to the documented APIs +there and do not include <linux/rbtree_augmented.h> from header files +either so as to minimize chances of your users accidentally relying on +such implementation details. + +On insertion, the user must update the augmented information on the path +leading to the inserted node, then call rb_link_node() as usual and +rb_augment_inserted() instead of the usual rb_insert_color() call. +If rb_augment_inserted() rebalances the rbtree, it will callback into +a user provided function to update the augmented information on the +affected subtrees. + +When erasing a node, the user must call rb_erase_augmented() instead of +rb_erase(). rb_erase_augmented() calls back into user provided functions +to updated the augmented information on affected subtrees. + +In both cases, the callbacks are provided through struct rb_augment_callbacks. +3 callbacks must be defined: + +- A propagation callback, which updates the augmented value for a given + node and its ancestors, up to a given stop point (or NULL to update + all the way to the root). + +- A copy callback, which copies the augmented value for a given subtree + to a newly assigned subtree root. + +- A tree rotation callback, which copies the augmented value for a given + subtree to a newly assigned subtree root AND recomputes the augmented + information for the former subtree root. + +The compiled code for rb_erase_augmented() may inline the propagation and +copy callbacks, which results in a large function, so each augmented rbtree +user should have a single rb_erase_augmented() call site in order to limit +compiled code size. + + +Sample usage: Interval tree is an example of augmented rb tree. Reference - "Introduction to Algorithms" by Cormen, Leiserson, Rivest and Stein. @@ -230,26 +261,132 @@ and its immediate children. And this will be used in O(log n) lookup for lowest match (lowest start address among all possible matches) with something like: -find_lowest_match(lo, hi, node) +struct interval_tree_node * +interval_tree_first_match(struct rb_root *root, + unsigned long start, unsigned long last) { - lowest_match = NULL; - while (node) { - if (max_hi(node->left) > lo) { - // Lowest overlap if any must be on left side - node = node->left; - } else if (overlap(lo, hi, node)) { - lowest_match = node; - break; - } else if (lo > node->lo) { - // Lowest overlap if any must be on right side - node = node->right; - } else { - break; + struct interval_tree_node *node; + + if (!root->rb_node) + return NULL; + node = rb_entry(root->rb_node, struct interval_tree_node, rb); + + while (true) { + if (node->rb.rb_left) { + struct interval_tree_node *left = + rb_entry(node->rb.rb_left, + struct interval_tree_node, rb); + if (left->__subtree_last >= start) { + /* + * Some nodes in left subtree satisfy Cond2. + * Iterate to find the leftmost such node N. + * If it also satisfies Cond1, that's the match + * we are looking for. Otherwise, there is no + * matching interval as nodes to the right of N + * can't satisfy Cond1 either. + */ + node = left; + continue; + } } + if (node->start <= last) { /* Cond1 */ + if (node->last >= start) /* Cond2 */ + return node; /* node is leftmost match */ + if (node->rb.rb_right) { + node = rb_entry(node->rb.rb_right, + struct interval_tree_node, rb); + if (node->__subtree_last >= start) + continue; + } + } + return NULL; /* No match */ + } +} + +Insertion/removal are defined using the following augmented callbacks: + +static inline unsigned long +compute_subtree_last(struct interval_tree_node *node) +{ + unsigned long max = node->last, subtree_last; + if (node->rb.rb_left) { + subtree_last = rb_entry(node->rb.rb_left, + struct interval_tree_node, rb)->__subtree_last; + if (max < subtree_last) + max = subtree_last; + } + if (node->rb.rb_right) { + subtree_last = rb_entry(node->rb.rb_right, + struct interval_tree_node, rb)->__subtree_last; + if (max < subtree_last) + max = subtree_last; + } + return max; +} + +static void augment_propagate(struct rb_node *rb, struct rb_node *stop) +{ + while (rb != stop) { + struct interval_tree_node *node = + rb_entry(rb, struct interval_tree_node, rb); + unsigned long subtree_last = compute_subtree_last(node); + if (node->__subtree_last == subtree_last) + break; + node->__subtree_last = subtree_last; + rb = rb_parent(&node->rb); } - return lowest_match; } -Finding exact match will be to first find lowest match and then to follow -successor nodes looking for exact match, until the start of a node is beyond -the hi value we are looking for. +static void augment_copy(struct rb_node *rb_old, struct rb_node *rb_new) +{ + struct interval_tree_node *old = + rb_entry(rb_old, struct interval_tree_node, rb); + struct interval_tree_node *new = + rb_entry(rb_new, struct interval_tree_node, rb); + + new->__subtree_last = old->__subtree_last; +} + +static void augment_rotate(struct rb_node *rb_old, struct rb_node *rb_new) +{ + struct interval_tree_node *old = + rb_entry(rb_old, struct interval_tree_node, rb); + struct interval_tree_node *new = + rb_entry(rb_new, struct interval_tree_node, rb); + + new->__subtree_last = old->__subtree_last; + old->__subtree_last = compute_subtree_last(old); +} + +static const struct rb_augment_callbacks augment_callbacks = { + augment_propagate, augment_copy, augment_rotate +}; + +void interval_tree_insert(struct interval_tree_node *node, + struct rb_root *root) +{ + struct rb_node **link = &root->rb_node, *rb_parent = NULL; + unsigned long start = node->start, last = node->last; + struct interval_tree_node *parent; + + while (*link) { + rb_parent = *link; + parent = rb_entry(rb_parent, struct interval_tree_node, rb); + if (parent->__subtree_last < last) + parent->__subtree_last = last; + if (start < parent->start) + link = &parent->rb.rb_left; + else + link = &parent->rb.rb_right; + } + + node->__subtree_last = last; + rb_link_node(&node->rb, rb_parent, link); + rb_insert_augmented(&node->rb, root, &augment_callbacks); +} + +void interval_tree_remove(struct interval_tree_node *node, + struct rb_root *root) +{ + rb_erase_augmented(&node->rb, root, &augment_callbacks); +} diff --git a/Documentation/vm/unevictable-lru.txt b/Documentation/vm/unevictable-lru.txt index fa206cccf89f..a68db7692ee8 100644 --- a/Documentation/vm/unevictable-lru.txt +++ b/Documentation/vm/unevictable-lru.txt @@ -197,12 +197,8 @@ the pages are also "rescued" from the unevictable list in the process of freeing them. page_evictable() also checks for mlocked pages by testing an additional page -flag, PG_mlocked (as wrapped by PageMlocked()). If the page is NOT mlocked, -and a non-NULL VMA is supplied, page_evictable() will check whether the VMA is -VM_LOCKED via is_mlocked_vma(). is_mlocked_vma() will SetPageMlocked() and -update the appropriate statistics if the vma is VM_LOCKED. This method allows -efficient "culling" of pages in the fault path that are being faulted in to -VM_LOCKED VMAs. +flag, PG_mlocked (as wrapped by PageMlocked()), which is set when a page is +faulted into a VM_LOCKED vma, or found in a vma being VM_LOCKED. VMSCAN'S HANDLING OF UNEVICTABLE PAGES @@ -371,8 +367,8 @@ mlock_fixup() filters several classes of "special" VMAs: mlock_fixup() will call make_pages_present() in the hugetlbfs VMA range to allocate the huge pages and populate the ptes. -3) VMAs with VM_DONTEXPAND or VM_RESERVED are generally userspace mappings of - kernel pages, such as the VDSO page, relay channel pages, etc. These pages +3) VMAs with VM_DONTEXPAND are generally userspace mappings of kernel pages, + such as the VDSO page, relay channel pages, etc. These pages are inherently unevictable and are not managed on the LRU lists. mlock_fixup() treats these VMAs the same as hugetlbfs VMAs. It calls make_pages_present() to populate the ptes. @@ -651,7 +647,7 @@ PAGE RECLAIM IN shrink_*_list() ------------------------------- shrink_active_list() culls any obviously unevictable pages - i.e. -!page_evictable(page, NULL) - diverting these to the unevictable list. +!page_evictable(page) - diverting these to the unevictable list. However, shrink_active_list() only sees unevictable pages that made it onto the active/inactive lru lists. Note that these pages do not have PageUnevictable set - otherwise they would be on the unevictable list and shrink_active_list diff --git a/MAINTAINERS b/MAINTAINERS index ab98a99bee92..eae3cd86831e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7039,6 +7039,14 @@ S: Maintained F: Documentation/svga.txt F: arch/x86/boot/video* +SWIOTLB SUBSYSTEM +M: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> +L: linux-kernel@vger.kernel.org +S: Supported +F: lib/swiotlb.c +F: arch/*/kernel/pci-swiotlb.c +F: include/linux/swiotlb.h + SYSV FILESYSTEM M: Christoph Hellwig <hch@infradead.org> S: Maintained diff --git a/arch/Kconfig b/arch/Kconfig index a62965d057f6..550cce4dd648 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -313,4 +313,7 @@ config HAVE_IRQ_TIME_ACCOUNTING Archs need to ensure they use a high enough resolution clock to support irq time accounting and then call enable_sched_clock_irqtime(). +config HAVE_ARCH_TRANSPARENT_HUGEPAGE + bool + source "kernel/gcov/Kconfig" diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c index 53649c7d0068..b51f7b4818cd 100644 --- a/arch/alpha/kernel/pci-sysfs.c +++ b/arch/alpha/kernel/pci-sysfs.c @@ -26,7 +26,7 @@ static int hose_mmap_page_range(struct pci_controller *hose, base = sparse ? hose->sparse_io_base : hose->dense_io_base; vma->vm_pgoff += base >> PAGE_SHIFT; - vma->vm_flags |= (VM_IO | VM_RESERVED); + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, vma->vm_end - vma->vm_start, diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 6d2f7f5c0036..2867a7742306 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -25,6 +25,7 @@ config ARM select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) select ARCH_BINFMT_ELF_RANDOMIZE_PIE select HAVE_GENERIC_DMA_COHERENT + select HAVE_DEBUG_KMEMLEAK select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO select HAVE_KERNEL_LZMA @@ -39,6 +40,7 @@ config ARM select HARDIRQS_SW_RESEND select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW + select HAVE_UID16 select ARCH_WANT_IPC_PARSE_VERSION select HARDIRQS_SW_RESEND select CPU_PM if (SUSPEND || CPU_IDLE) diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c index 7599e2625c7d..2a5907b5c8d2 100644 --- a/arch/arm/mm/fault-armv.c +++ b/arch/arm/mm/fault-armv.c @@ -134,7 +134,6 @@ make_coherent(struct address_space *mapping, struct vm_area_struct *vma, { struct mm_struct *mm = vma->vm_mm; struct vm_area_struct *mpnt; - struct prio_tree_iter iter; unsigned long offset; pgoff_t pgoff; int aliases = 0; @@ -147,7 +146,7 @@ make_coherent(struct address_space *mapping, struct vm_area_struct *vma, * cache coherency. */ flush_dcache_mmap_lock(mapping); - vma_prio_tree_foreach(mpnt, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(mpnt, &mapping->i_mmap, pgoff, pgoff) { /* * If this VMA is not in our MM, we can ignore it. * Note that we intentionally mask out the VMA diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index c3bd83450227..5dbf13f954f6 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -336,6 +336,7 @@ retry: /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk * of starvation. */ flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; goto retry; } } diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c index 40ca11ed6e5f..1c8f7f564175 100644 --- a/arch/arm/mm/flush.c +++ b/arch/arm/mm/flush.c @@ -196,7 +196,6 @@ static void __flush_dcache_aliases(struct address_space *mapping, struct page *p { struct mm_struct *mm = current->active_mm; struct vm_area_struct *mpnt; - struct prio_tree_iter iter; pgoff_t pgoff; /* @@ -208,7 +207,7 @@ static void __flush_dcache_aliases(struct address_space *mapping, struct page *p pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); flush_dcache_mmap_lock(mapping); - vma_prio_tree_foreach(mpnt, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(mpnt, &mapping->i_mmap, pgoff, pgoff) { unsigned long offset; /* diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 767ba5685454..7ff68c946073 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -10,6 +10,8 @@ config ARM64 select GENERIC_TIME_VSYSCALL select HARDIRQS_SW_RESEND select HAVE_ARCH_TRACEHOOK + select HAVE_DEBUG_BUGVERBOSE + select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_DMA_ATTRS select HAVE_GENERIC_DMA_COHERENT @@ -26,6 +28,7 @@ config ARM64 select PERF_USE_VMALLOC select RTC_LIB select SPARSE_IRQ + select SYSCTL_EXCEPTION_TRACE help ARM 64-bit (AArch64) Linux support. @@ -193,6 +196,7 @@ config COMPAT bool "Kernel support for 32-bit EL0" depends on !ARM64_64K_PAGES select COMPAT_BINFMT_ELF + select HAVE_UID16 help This option enables support for a 32-bit EL0 running under a 64-bit kernel at EL1. AArch32-specific components such as system calls, diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c index b92e60958617..b2f2d2d66849 100644 --- a/arch/avr32/mm/fault.c +++ b/arch/avr32/mm/fault.c @@ -152,6 +152,7 @@ good_area: tsk->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* * No need to up_read(&mm->mmap_sem) as we would have diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index 99224c4eb86b..ccd9193932b2 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -33,6 +33,7 @@ config BLACKFIN select HAVE_PERF_EVENTS select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_WANT_OPTIONAL_GPIOLIB + select HAVE_UID16 select ARCH_WANT_IPC_PARSE_VERSION select HAVE_GENERIC_HARDIRQS select GENERIC_ATOMIC64 diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig index 72bd5ae50a89..a118163b04ee 100644 --- a/arch/cris/Kconfig +++ b/arch/cris/Kconfig @@ -42,6 +42,7 @@ config CRIS select HAVE_IDE select GENERIC_ATOMIC64 select HAVE_GENERIC_HARDIRQS + select HAVE_UID16 select ARCH_WANT_IPC_PARSE_VERSION select GENERIC_IRQ_SHOW select GENERIC_IOMAP diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c index 45fd542cf173..73312ab6c696 100644 --- a/arch/cris/mm/fault.c +++ b/arch/cris/mm/fault.c @@ -186,6 +186,7 @@ retry: tsk->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* * No need to up_read(&mm->mmap_sem) as we would diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig index 971c0a19facb..9d262645f667 100644 --- a/arch/frv/Kconfig +++ b/arch/frv/Kconfig @@ -5,8 +5,10 @@ config FRV select HAVE_ARCH_TRACEHOOK select HAVE_IRQ_WORK select HAVE_PERF_EVENTS + select HAVE_UID16 select HAVE_GENERIC_HARDIRQS select GENERIC_IRQ_SHOW + select HAVE_DEBUG_BUGVERBOSE select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_CPU_DEVICES select ARCH_WANT_IPC_PARSE_VERSION diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 5e8a0d9a09ce..90462eb23d02 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -3,6 +3,7 @@ config H8300 default y select HAVE_IDE select HAVE_GENERIC_HARDIRQS + select HAVE_UID16 select ARCH_WANT_IPC_PARSE_VERSION select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES diff --git a/arch/hexagon/mm/vm_fault.c b/arch/hexagon/mm/vm_fault.c index 06695cc4fe58..513b74cb397e 100644 --- a/arch/hexagon/mm/vm_fault.c +++ b/arch/hexagon/mm/vm_fault.c @@ -113,6 +113,7 @@ good_area: current->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; goto retry; } } diff --git a/arch/ia64/include/asm/hugetlb.h b/arch/ia64/include/asm/hugetlb.h index da55c63728e0..94eaa5bd5d0c 100644 --- a/arch/ia64/include/asm/hugetlb.h +++ b/arch/ia64/include/asm/hugetlb.h @@ -77,4 +77,8 @@ static inline void arch_release_hugepage(struct page *page) { } +static inline void arch_clear_hugepage_flags(struct page *page) +{ +} + #endif /* _ASM_IA64_HUGETLB_H */ diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c index f388b4e18a37..ea39eba61ef5 100644 --- a/arch/ia64/kernel/perfmon.c +++ b/arch/ia64/kernel/perfmon.c @@ -2307,7 +2307,7 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t */ vma->vm_mm = mm; vma->vm_file = get_file(filp); - vma->vm_flags = VM_READ| VM_MAYREAD |VM_RESERVED; + vma->vm_flags = VM_READ|VM_MAYREAD|VM_DONTEXPAND|VM_DONTDUMP; vma->vm_page_prot = PAGE_READONLY; /* XXX may need to change */ /* diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c index 8443daf4f515..6cf0341f978e 100644 --- a/arch/ia64/mm/fault.c +++ b/arch/ia64/mm/fault.c @@ -184,6 +184,7 @@ retry: current->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* No need to up_read(&mm->mmap_sem) as we would * have already released it in __lock_page_or_retry diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 0eab454867a2..acd5b68e8871 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -138,7 +138,8 @@ ia64_init_addr_space (void) vma->vm_mm = current->mm; vma->vm_end = PAGE_SIZE; vma->vm_page_prot = __pgprot(pgprot_val(PAGE_READONLY) | _PAGE_MA_NAT); - vma->vm_flags = VM_READ | VM_MAYREAD | VM_IO | VM_RESERVED; + vma->vm_flags = VM_READ | VM_MAYREAD | VM_IO | + VM_DONTEXPAND | VM_DONTDUMP; down_write(¤t->mm->mmap_sem); if (insert_vm_struct(current->mm, vma)) { up_write(¤t->mm->mmap_sem); @@ -636,6 +637,7 @@ mem_init (void) high_memory = __va(max_low_pfn * PAGE_SIZE); + reset_zone_present_pages(); for_each_online_pgdat(pgdat) if (pgdat->bdata->node_bootmem_map) totalram_pages += free_all_bootmem_node(pgdat); diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index 49498bbb9616..e875fc3ce9cb 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -8,6 +8,7 @@ config M32R select HAVE_KERNEL_BZIP2 select HAVE_KERNEL_LZMA select ARCH_WANT_IPC_PARSE_VERSION + select HAVE_DEBUG_BUGVERBOSE select HAVE_GENERIC_HARDIRQS select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index b22df9410dce..dae1e7e16a37 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -3,9 +3,11 @@ config M68K default y select HAVE_IDE select HAVE_AOUT if MMU + select HAVE_DEBUG_BUGVERBOSE select HAVE_GENERIC_HARDIRQS select GENERIC_IRQ_SHOW select GENERIC_ATOMIC64 + select HAVE_UID16 select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS select GENERIC_CPU_DEVICES select GENERIC_STRNCPY_FROM_USER if MMU diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c index aeebbb7b30f0..a563727806bf 100644 --- a/arch/m68k/mm/fault.c +++ b/arch/m68k/mm/fault.c @@ -170,6 +170,7 @@ good_area: /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk * of starvation. */ flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* * No need to up_read(&mm->mmap_sem) as we would diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 6133bed2b855..53fd94ab60f0 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -16,6 +16,7 @@ config MICROBLAZE select OF select OF_EARLY_FLATTREE select ARCH_WANT_IPC_PARSE_VERSION + select HAVE_DEBUG_KMEMLEAK select IRQ_DOMAIN select HAVE_GENERIC_HARDIRQS select GENERIC_IRQ_PROBE diff --git a/arch/microblaze/include/asm/atomic.h b/arch/microblaze/include/asm/atomic.h index 472d8bf726df..42ac382a09da 100644 --- a/arch/microblaze/include/asm/atomic.h +++ b/arch/microblaze/include/asm/atomic.h @@ -22,5 +22,6 @@ static inline int atomic_dec_if_positive(atomic_t *v) return res; } +#define atomic_dec_if_positive atomic_dec_if_positive #endif /* _ASM_MICROBLAZE_ATOMIC_H */ diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c index eb365d6795fa..714b35a9c4f7 100644 --- a/arch/microblaze/mm/fault.c +++ b/arch/microblaze/mm/fault.c @@ -233,6 +233,7 @@ good_area: current->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* * No need to up_read(&mm->mmap_sem) as we would diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 4cd538b42a3f..35453eaeffb5 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -17,6 +17,7 @@ config MIPS select HAVE_FUNCTION_GRAPH_TRACER select HAVE_KPROBES select HAVE_KRETPROBES + select HAVE_DEBUG_KMEMLEAK select ARCH_BINFMT_ELF_RANDOMIZE_PIE select RTC_LIB if !MACH_LOONGSON select GENERIC_ATOMIC64 if !64BIT diff --git a/arch/mips/include/asm/hugetlb.h b/arch/mips/include/asm/hugetlb.h index 58d36889f09b..bd94946a18f3 100644 --- a/arch/mips/include/asm/hugetlb.h +++ b/arch/mips/include/asm/hugetlb.h @@ -112,4 +112,8 @@ static inline void arch_release_hugepage(struct page *page) { } +static inline void arch_clear_hugepage_flags(struct page *page) +{ +} + #endif /* __ASM_HUGETLB_H */ diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c index 7a19957735e9..ddcec1e1a0cd 100644 --- a/arch/mips/mm/fault.c +++ b/arch/mips/mm/fault.c @@ -171,6 +171,7 @@ good_area: } if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* * No need to up_read(&mm->mmap_sem) as we would diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c index 40f850e9766c..e2bfafce66c5 100644 --- a/arch/openrisc/mm/fault.c +++ b/arch/openrisc/mm/fault.c @@ -183,6 +183,7 @@ good_area: tsk->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* No need to up_read(&mm->mmap_sem) as we would * have already released it in __lock_page_or_retry diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 9d181890a7e3..48e16dc20102 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -276,7 +276,6 @@ void flush_dcache_page(struct page *page) { struct address_space *mapping = page_mapping(page); struct vm_area_struct *mpnt; - struct prio_tree_iter iter; unsigned long offset; unsigned long addr, old_addr = 0; pgoff_t pgoff; @@ -299,7 +298,7 @@ void flush_dcache_page(struct page *page) * to flush one address here for them all to become coherent */ flush_dcache_mmap_lock(mapping); - vma_prio_tree_foreach(mpnt, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(mpnt, &mapping->i_mmap, pgoff, pgoff) { offset = (pgoff - mpnt->vm_pgoff) << PAGE_SHIFT; addr = mpnt->vm_start + offset; diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 4ce0be32d153..df7edb887a04 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -99,6 +99,7 @@ config PPC select HAVE_DYNAMIC_FTRACE select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER + select SYSCTL_EXCEPTION_TRACE select ARCH_WANT_OPTIONAL_GPIOLIB select HAVE_IDE select HAVE_IOREMAP_PROT @@ -113,6 +114,7 @@ config PPC select HAVE_DMA_API_DEBUG select USE_GENERIC_SMP_HELPERS if SMP select HAVE_OPROFILE + select HAVE_DEBUG_KMEMLEAK select HAVE_SYSCALL_WRAPPERS if PPC64 select GENERIC_ATOMIC64 if PPC32 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h index da29032ae38f..e3b1d41c89be 100644 --- a/arch/powerpc/include/asm/atomic.h +++ b/arch/powerpc/include/asm/atomic.h @@ -268,6 +268,7 @@ static __inline__ int atomic_dec_if_positive(atomic_t *v) return t; } +#define atomic_dec_if_positive atomic_dec_if_positive #define smp_mb__before_atomic_dec() smp_mb() #define smp_mb__after_atomic_dec() smp_mb() diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h index dfdb95bc59a5..62e11a32c4c2 100644 --- a/arch/powerpc/include/asm/hugetlb.h +++ b/arch/powerpc/include/asm/hugetlb.h @@ -151,6 +151,10 @@ static inline void arch_release_hugepage(struct page *page) { } +static inline void arch_clear_hugepage_flags(struct page *page) +{ +} + #else /* ! CONFIG_HUGETLB_PAGE */ static inline void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 83e929e66f9d..721d4603a235 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1183,7 +1183,7 @@ static const struct vm_operations_struct kvm_rma_vm_ops = { static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) { - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = &kvm_rma_vm_ops; return 0; } diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 5495ebe983a2..0a6b28336eb0 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -451,6 +451,7 @@ good_area: /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk * of starvation. */ flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; goto retry; } } diff --git a/arch/powerpc/oprofile/cell/spu_task_sync.c b/arch/powerpc/oprofile/cell/spu_task_sync.c index 642fca137ccb..28f1af2db1f5 100644 --- a/arch/powerpc/oprofile/cell/spu_task_sync.c +++ b/arch/powerpc/oprofile/cell/spu_task_sync.c @@ -304,7 +304,7 @@ static inline unsigned long fast_get_dcookie(struct path *path) return cookie; } -/* Look up the dcookie for the task's first VM_EXECUTABLE mapping, +/* Look up the dcookie for the task's mm->exe_file, * which corresponds loosely to "application name". Also, determine * the offset for the SPU ELF object. If computed offset is * non-zero, it implies an embedded SPU object; otherwise, it's a @@ -321,7 +321,6 @@ get_exec_dcookie_and_offset(struct spu *spu, unsigned int *offsetp, { unsigned long app_cookie = 0; unsigned int my_offset = 0; - struct file *app = NULL; struct vm_area_struct *vma; struct mm_struct *mm = spu->mm; @@ -330,16 +329,10 @@ get_exec_dcookie_and_offset(struct spu *spu, unsigned int *offsetp, down_read(&mm->mmap_sem); - for (vma = mm->mmap; vma; vma = vma->vm_next) { - if (!vma->vm_file) - continue; - if (!(vma->vm_flags & VM_EXECUTABLE)) - continue; - app_cookie = fast_get_dcookie(&vma->vm_file->f_path); + if (mm->exe_file) { + app_cookie = fast_get_dcookie(&mm->exe_file->f_path); pr_debug("got dcookie for %s\n", - vma->vm_file->f_dentry->d_name.name); - app = vma->vm_file; - break; + mm->exe_file->f_dentry->d_name.name); } for (vma = mm->mmap; vma; vma = vma->vm_next) { diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c index 11d8e0544ac0..dc0a035e63bb 100644 --- a/arch/powerpc/platforms/pseries/hotplug-memory.c +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c @@ -77,7 +77,8 @@ static int pseries_remove_memblock(unsigned long base, unsigned int memblock_siz { unsigned long start, start_pfn; struct zone *zone; - int ret; + int i, ret; + int sections_to_remove; start_pfn = base >> PAGE_SHIFT; @@ -97,9 +98,13 @@ static int pseries_remove_memblock(unsigned long base, unsigned int memblock_siz * to sysfs "state" file and we can't remove sysfs entries * while writing to it. So we have to defer it to here. */ - ret = __remove_pages(zone, start_pfn, memblock_size >> PAGE_SHIFT); - if (ret) - return ret; + sections_to_remove = (memblock_size >> PAGE_SHIFT) / PAGES_PER_SECTION; + for (i = 0; i < sections_to_remove; i++) { + unsigned long pfn = start_pfn + i * PAGES_PER_SECTION; + ret = __remove_pages(zone, start_pfn, PAGES_PER_SECTION); + if (ret) + return ret; + } /* * Update memory regions for memory remove diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index c8af429991d9..ceff7aef2477 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -68,6 +68,7 @@ config S390 select HAVE_FTRACE_MCOUNT_RECORD select HAVE_C_RECORDMCOUNT select HAVE_SYSCALL_TRACEPOINTS + select SYSCTL_EXCEPTION_TRACE select HAVE_DYNAMIC_FTRACE select HAVE_FUNCTION_GRAPH_TRACER select HAVE_REGS_AND_STACK_ACCESS_API @@ -80,6 +81,7 @@ config S390 select HAVE_IRQ_WORK select HAVE_PERF_EVENTS select ARCH_HAVE_NMI_SAFE_CMPXCHG + select HAVE_DEBUG_KMEMLEAK select HAVE_KERNEL_GZIP select HAVE_KERNEL_BZIP2 select HAVE_KERNEL_LZMA @@ -126,6 +128,7 @@ config S390 select ARCH_INLINE_WRITE_UNLOCK_BH select ARCH_INLINE_WRITE_UNLOCK_IRQ select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE + select HAVE_UID16 if 32BIT select ARCH_WANT_IPC_PARSE_VERSION select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h index 2d6e6e380564..593753ee07f3 100644 --- a/arch/s390/include/asm/hugetlb.h +++ b/arch/s390/include/asm/hugetlb.h @@ -33,6 +33,7 @@ static inline int prepare_hugepage_range(struct file *file, } #define hugetlb_prefault_arch_hook(mm) do { } while (0) +#define arch_clear_hugepage_flags(page) do { } while (0) int arch_prepare_hugepage(struct page *page); void arch_release_hugepage(struct page *page); @@ -77,23 +78,6 @@ static inline void __pmd_csp(pmd_t *pmdp) " csp %1,%3" : "=m" (*pmdp) : "d" (reg2), "d" (reg3), "d" (reg4), "m" (*pmdp) : "cc"); - pmd_val(*pmdp) = _SEGMENT_ENTRY_INV | _SEGMENT_ENTRY; -} - -static inline void __pmd_idte(unsigned long address, pmd_t *pmdp) -{ - unsigned long sto = (unsigned long) pmdp - - pmd_index(address) * sizeof(pmd_t); - - if (!(pmd_val(*pmdp) & _SEGMENT_ENTRY_INV)) { - asm volatile( - " .insn rrf,0xb98e0000,%2,%3,0,0" - : "=m" (*pmdp) - : "m" (*pmdp), "a" (sto), - "a" ((address & HPAGE_MASK)) - ); - } - pmd_val(*pmdp) = _SEGMENT_ENTRY_INV | _SEGMENT_ENTRY; } static inline void huge_ptep_invalidate(struct mm_struct *mm, @@ -105,6 +89,7 @@ static inline void huge_ptep_invalidate(struct mm_struct *mm, __pmd_idte(address, pmdp); else __pmd_csp(pmdp); + pmd_val(*pmdp) = _SEGMENT_ENTRY_INV | _SEGMENT_ENTRY; } static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 6bd7d7483017..979fe3dc0788 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -42,6 +42,7 @@ extern void fault_init(void); * tables contain all the necessary information. */ #define update_mmu_cache(vma, address, ptep) do { } while (0) +#define update_mmu_cache_pmd(vma, address, ptep) do { } while (0) /* * ZERO_PAGE is a global shared page that is always zero; used @@ -347,6 +348,12 @@ extern struct page *vmemmap; #define _SEGMENT_ENTRY_LARGE 0x400 /* STE-format control, large page */ #define _SEGMENT_ENTRY_CO 0x100 /* change-recording override */ +#define _SEGMENT_ENTRY_SPLIT_BIT 0 /* THP splitting bit number */ +#define _SEGMENT_ENTRY_SPLIT (1UL << _SEGMENT_ENTRY_SPLIT_BIT) + +/* Set of bits not changed in pmd_modify */ +#define _SEGMENT_CHG_MASK (_SEGMENT_ENTRY_ORIGIN | _SEGMENT_ENTRY_LARGE \ + | _SEGMENT_ENTRY_SPLIT | _SEGMENT_ENTRY_CO) /* Page status table bits for virtualization */ #define RCP_ACC_BITS 0xf000000000000000UL @@ -506,6 +513,30 @@ static inline int pmd_bad(pmd_t pmd) return (pmd_val(pmd) & mask) != _SEGMENT_ENTRY; } +#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH +extern void pmdp_splitting_flush(struct vm_area_struct *vma, + unsigned long addr, pmd_t *pmdp); + +#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS +extern int pmdp_set_access_flags(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp, + pmd_t entry, int dirty); + +#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH +extern int pmdp_clear_flush_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp); + +#define __HAVE_ARCH_PMD_WRITE +static inline int pmd_write(pmd_t pmd) +{ + return (pmd_val(pmd) & _SEGMENT_ENTRY_RO) == 0; +} + +static inline int pmd_young(pmd_t pmd) +{ + return 0; +} + static inline int pte_none(pte_t pte) { return (pte_val(pte) & _PAGE_INVALID) && !(pte_val(pte) & _PAGE_SWT); @@ -1159,6 +1190,185 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) #define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address) #define pte_unmap(pte) do { } while (0) +static inline void __pmd_idte(unsigned long address, pmd_t *pmdp) +{ + unsigned long sto = (unsigned long) pmdp - + pmd_index(address) * sizeof(pmd_t); + + if (!(pmd_val(*pmdp) & _SEGMENT_ENTRY_INV)) { + asm volatile( + " .insn rrf,0xb98e0000,%2,%3,0,0" + : "=m" (*pmdp) + : "m" (*pmdp), "a" (sto), + "a" ((address & HPAGE_MASK)) + : "cc" + ); + } +} + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#define __HAVE_ARCH_PGTABLE_DEPOSIT +extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable); + +#define __HAVE_ARCH_PGTABLE_WITHDRAW +extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm); + +static inline int pmd_trans_splitting(pmd_t pmd) +{ + return pmd_val(pmd) & _SEGMENT_ENTRY_SPLIT; +} + +static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t entry) +{ + *pmdp = entry; +} + +static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) +{ + unsigned long pgprot_pmd = 0; + + if (pgprot_val(pgprot) & _PAGE_INVALID) { + if (pgprot_val(pgprot) & _PAGE_SWT) + pgprot_pmd |= _HPAGE_TYPE_NONE; + pgprot_pmd |= _SEGMENT_ENTRY_INV; + } + if (pgprot_val(pgprot) & _PAGE_RO) + pgprot_pmd |= _SEGMENT_ENTRY_RO; + return pgprot_pmd; +} + +static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) +{ + pmd_val(pmd) &= _SEGMENT_CHG_MASK; + pmd_val(pmd) |= massage_pgprot_pmd(newprot); + return pmd; +} + +static inline pmd_t pmd_mkhuge(pmd_t pmd) +{ + pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE; + return pmd; +} + +static inline pmd_t pmd_mkwrite(pmd_t pmd) +{ + pmd_val(pmd) &= ~_SEGMENT_ENTRY_RO; + return pmd; +} + +static inline pmd_t pmd_wrprotect(pmd_t pmd) +{ + pmd_val(pmd) |= _SEGMENT_ENTRY_RO; + return pmd; +} + +static inline pmd_t pmd_mkdirty(pmd_t pmd) +{ + /* No dirty bit in the segment table entry. */ + return pmd; +} + +static inline pmd_t pmd_mkold(pmd_t pmd) +{ + /* No referenced bit in the segment table entry. */ + return pmd; +} + +static inline pmd_t pmd_mkyoung(pmd_t pmd) +{ + /* No referenced bit in the segment table entry. */ + return pmd; +} + +#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG +static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) +{ + unsigned long pmd_addr = pmd_val(*pmdp) & HPAGE_MASK; + long tmp, rc; + int counter; + + rc = 0; + if (MACHINE_HAS_RRBM) { + counter = PTRS_PER_PTE >> 6; + asm volatile( + "0: .insn rre,0xb9ae0000,%0,%3\n" /* rrbm */ + " ogr %1,%0\n" + " la %3,0(%4,%3)\n" + " brct %2,0b\n" + : "=&d" (tmp), "+&d" (rc), "+d" (counter), + "+a" (pmd_addr) + : "a" (64 * 4096UL) : "cc"); + rc = !!rc; + } else { + counter = PTRS_PER_PTE; + asm volatile( + "0: rrbe 0,%2\n" + " la %2,0(%3,%2)\n" + " brc 12,1f\n" + " lhi %0,1\n" + "1: brct %1,0b\n" + : "+d" (rc), "+d" (counter), "+a" (pmd_addr) + : "a" (4096UL) : "cc"); + } + return rc; +} + +#define __HAVE_ARCH_PMDP_GET_AND_CLEAR +static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, + unsigned long address, pmd_t *pmdp) +{ + pmd_t pmd = *pmdp; + + __pmd_idte(address, pmdp); + pmd_clear(pmdp); + return pmd; +} + +#define __HAVE_ARCH_PMDP_CLEAR_FLUSH +static inline pmd_t pmdp_clear_flush(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) +{ + return pmdp_get_and_clear(vma->vm_mm, address, pmdp); +} + +#define __HAVE_ARCH_PMDP_INVALIDATE +static inline void pmdp_invalidate(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) +{ + __pmd_idte(address, pmdp); +} + +static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot) +{ + pmd_t __pmd; + pmd_val(__pmd) = physpage + massage_pgprot_pmd(pgprot); + return __pmd; +} + +#define pfn_pmd(pfn, pgprot) mk_pmd_phys(__pa((pfn) << PAGE_SHIFT), (pgprot)) +#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) + +static inline int pmd_trans_huge(pmd_t pmd) +{ + return pmd_val(pmd) & _SEGMENT_ENTRY_LARGE; +} + +static inline int has_transparent_hugepage(void) +{ + return MACHINE_HAS_HPAGE ? 1 : 0; +} + +static inline unsigned long pmd_pfn(pmd_t pmd) +{ + if (pmd_trans_huge(pmd)) + return pmd_val(pmd) >> HPAGE_SHIFT; + else + return pmd_val(pmd) >> PAGE_SHIFT; +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ + /* * 31 bit swap entry format: * A page-table entry has some bits we have to treat in a special way. diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h index 87b47ca954f1..8cfd731a18d8 100644 --- a/arch/s390/include/asm/setup.h +++ b/arch/s390/include/asm/setup.h @@ -81,6 +81,7 @@ extern unsigned int s390_user_mode; #define MACHINE_FLAG_SPP (1UL << 13) #define MACHINE_FLAG_TOPOLOGY (1UL << 14) #define MACHINE_FLAG_TE (1UL << 15) +#define MACHINE_FLAG_RRBM (1UL << 16) #define MACHINE_IS_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM) #define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM) @@ -99,7 +100,8 @@ extern unsigned int s390_user_mode; #define MACHINE_HAS_PFMF (0) #define MACHINE_HAS_SPP (0) #define MACHINE_HAS_TOPOLOGY (0) -#define MACHINE_HAS_TE (0) +#define MACHINE_HAS_TE (0) +#define MACHINE_HAS_RRBM (0) #else /* CONFIG_64BIT */ #define MACHINE_HAS_IEEE (1) #define MACHINE_HAS_CSP (1) @@ -112,6 +114,7 @@ extern unsigned int s390_user_mode; #define MACHINE_HAS_SPP (S390_lowcore.machine_flags & MACHINE_FLAG_SPP) #define MACHINE_HAS_TOPOLOGY (S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY) #define MACHINE_HAS_TE (S390_lowcore.machine_flags & MACHINE_FLAG_TE) +#define MACHINE_HAS_RRBM (S390_lowcore.machine_flags & MACHINE_FLAG_RRBM) #endif /* CONFIG_64BIT */ #define ZFCPDUMP_HSA_SIZE (32UL<<20) diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h index 06e5acbc84bd..b75d7d686684 100644 --- a/arch/s390/include/asm/tlb.h +++ b/arch/s390/include/asm/tlb.h @@ -137,6 +137,7 @@ static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, #define tlb_start_vma(tlb, vma) do { } while (0) #define tlb_end_vma(tlb, vma) do { } while (0) #define tlb_remove_tlb_entry(tlb, ptep, addr) do { } while (0) +#define tlb_remove_pmd_tlb_entry(tlb, pmdp, addr) do { } while (0) #define tlb_migrate_finish(mm) do { } while (0) #endif /* _S390_TLB_H */ diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 7f4717675c19..00d114445068 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -388,6 +388,8 @@ static __init void detect_machine_facilities(void) S390_lowcore.machine_flags |= MACHINE_FLAG_SPP; if (test_facility(50) && test_facility(73)) S390_lowcore.machine_flags |= MACHINE_FLAG_TE; + if (test_facility(66)) + S390_lowcore.machine_flags |= MACHINE_FLAG_RRBM; #endif } diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index ac9122ca1152..04ad4001a289 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -367,6 +367,7 @@ retry: /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk * of starvation. */ flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; down_read(&mm->mmap_sem); goto retry; } diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c index eeaf8023851f..60acb93a4680 100644 --- a/arch/s390/mm/gup.c +++ b/arch/s390/mm/gup.c @@ -115,7 +115,16 @@ static inline int gup_pmd_range(pud_t *pudp, pud_t pud, unsigned long addr, pmd = *pmdp; barrier(); next = pmd_addr_end(addr, end); - if (pmd_none(pmd)) + /* + * The pmd_trans_splitting() check below explains why + * pmdp_splitting_flush() has to serialize with + * smp_call_function() against our disabled IRQs, to stop + * this gup-fast code from running while we set the + * splitting bit in the pmd. Returning zero will take + * the slow path that will call wait_split_huge_page() + * if the pmd is still in splitting state. + */ + if (pmd_none(pmd) || pmd_trans_splitting(pmd)) return 0; if (unlikely(pmd_huge(pmd))) { if (!gup_huge_pmd(pmdp, pmd, addr, next, diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index b402991e43d7..c8188a18af05 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -787,6 +787,30 @@ void tlb_remove_table(struct mmu_gather *tlb, void *table) tlb_table_flush(tlb); } +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +void thp_split_vma(struct vm_area_struct *vma) +{ + unsigned long addr; + struct page *page; + + for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { + page = follow_page(vma, addr, FOLL_SPLIT); + } +} + +void thp_split_mm(struct mm_struct *mm) +{ + struct vm_area_struct *vma = mm->mmap; + + while (vma != NULL) { + thp_split_vma(vma); + vma->vm_flags &= ~VM_HUGEPAGE; + vma->vm_flags |= VM_NOHUGEPAGE; + vma = vma->vm_next; + } +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ + /* * switch on pgstes for its userspace process (for kvm) */ @@ -824,6 +848,12 @@ int s390_enable_sie(void) if (!mm) return -ENOMEM; +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + /* split thp mappings and disable thp for future mappings */ + thp_split_mm(mm); + mm->def_flags |= VM_NOHUGEPAGE; +#endif + /* Now lets check again if something happened */ task_lock(tsk); if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 || @@ -866,3 +896,81 @@ bool kernel_page_present(struct page *page) return cc == 0; } #endif /* CONFIG_HIBERNATION && CONFIG_DEBUG_PAGEALLOC */ + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +int pmdp_clear_flush_young(struct vm_area_struct *vma, unsigned long address, + pmd_t *pmdp) +{ + VM_BUG_ON(address & ~HPAGE_PMD_MASK); + /* No need to flush TLB + * On s390 reference bits are in storage key and never in TLB */ + return pmdp_test_and_clear_young(vma, address, pmdp); +} + +int pmdp_set_access_flags(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp, + pmd_t entry, int dirty) +{ + VM_BUG_ON(address & ~HPAGE_PMD_MASK); + + if (pmd_same(*pmdp, entry)) + return 0; + pmdp_invalidate(vma, address, pmdp); + set_pmd_at(vma->vm_mm, address, pmdp, entry); + return 1; +} + +static void pmdp_splitting_flush_sync(void *arg) +{ + /* Simply deliver the interrupt */ +} + +void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address, + pmd_t *pmdp) +{ + VM_BUG_ON(address & ~HPAGE_PMD_MASK); + if (!test_and_set_bit(_SEGMENT_ENTRY_SPLIT_BIT, + (unsigned long *) pmdp)) { + /* need to serialize against gup-fast (IRQ disabled) */ + smp_call_function(pmdp_splitting_flush_sync, NULL, 1); + } +} + +void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable) +{ + struct list_head *lh = (struct list_head *) pgtable; + + assert_spin_locked(&mm->page_table_lock); + + /* FIFO */ + if (!mm->pmd_huge_pte) + INIT_LIST_HEAD(lh); + else + list_add(lh, (struct list_head *) mm->pmd_huge_pte); + mm->pmd_huge_pte = pgtable; +} + +pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm) +{ + struct list_head *lh; + pgtable_t pgtable; + pte_t *ptep; + + assert_spin_locked(&mm->page_table_lock); + + /* FIFO */ + pgtable = mm->pmd_huge_pte; + lh = (struct list_head *) pgtable; + if (list_empty(lh)) + mm->pmd_huge_pte = NULL; + else { + mm->pmd_huge_pte = (pgtable_t) lh->next; + list_del(lh); + } + ptep = (pte_t *) pgtable; + pte_val(*ptep) = _PAGE_TYPE_EMPTY; + ptep++; + pte_val(*ptep) = _PAGE_TYPE_EMPTY; + return pgtable; +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 36f5141e8041..3b3e27a3ff2c 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -13,14 +13,17 @@ config SUPERH select HAVE_DMA_ATTRS select HAVE_IRQ_WORK select HAVE_PERF_EVENTS + select HAVE_DEBUG_BUGVERBOSE select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) select PERF_USE_VMALLOC + select HAVE_DEBUG_KMEMLEAK select HAVE_KERNEL_GZIP select HAVE_KERNEL_BZIP2 select HAVE_KERNEL_LZMA select HAVE_KERNEL_XZ select HAVE_KERNEL_LZO + select HAVE_UID16 select ARCH_WANT_IPC_PARSE_VERSION select HAVE_SYSCALL_TRACEPOINTS select HAVE_REGS_AND_STACK_ACCESS_API diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h index 967068fb79ac..b3808c7d67b2 100644 --- a/arch/sh/include/asm/hugetlb.h +++ b/arch/sh/include/asm/hugetlb.h @@ -1,6 +1,7 @@ #ifndef _ASM_SH_HUGETLB_H #define _ASM_SH_HUGETLB_H +#include <asm/cacheflush.h> #include <asm/page.h> @@ -89,4 +90,9 @@ static inline void arch_release_hugepage(struct page *page) { } +static inline void arch_clear_hugepage_flags(struct page *page) +{ + clear_bit(PG_dcache_clean, &page->flags); +} + #endif /* _ASM_SH_HUGETLB_H */ diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c index 3bdc1ad9a341..cbbdcad8fcb3 100644 --- a/arch/sh/mm/fault.c +++ b/arch/sh/mm/fault.c @@ -504,6 +504,7 @@ good_area: } if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* * No need to up_read(&mm->mmap_sem) as we would diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 67f1f6f5f4e1..91c780c973ba 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -18,6 +18,7 @@ config SPARC select HAVE_OPROFILE select HAVE_ARCH_KGDB if !SMP || SPARC64 select HAVE_ARCH_TRACEHOOK + select SYSCTL_EXCEPTION_TRACE select ARCH_WANT_OPTIONAL_GPIOLIB select RTC_CLASS select RTC_DRV_M48T59 @@ -32,6 +33,7 @@ config SPARC select GENERIC_PCI_IOMAP select HAVE_NMI_WATCHDOG if SPARC64 select HAVE_BPF_JIT + select HAVE_DEBUG_BUGVERBOSE select GENERIC_SMP_IDLE_THREAD select GENERIC_CMOS_UPDATE select GENERIC_CLOCKEVENTS @@ -42,6 +44,7 @@ config SPARC32 def_bool !64BIT select GENERIC_ATOMIC64 select CLZ_TAB + select HAVE_UID16 config SPARC64 def_bool 64BIT @@ -59,6 +62,7 @@ config SPARC64 select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD select HAVE_SYSCALL_TRACEPOINTS + select HAVE_DEBUG_KMEMLEAK select RTC_DRV_CMOS select RTC_DRV_BQ4802 select RTC_DRV_SUN4V @@ -226,25 +230,6 @@ config EARLYFB help Say Y here to enable a faster early framebuffer boot console. -choice - prompt "Kernel page size" if SPARC64 - default SPARC64_PAGE_SIZE_8KB - -config SPARC64_PAGE_SIZE_8KB - bool "8KB" - help - This lets you select the page size of the kernel. - - 8KB and 64KB work quite well, since SPARC ELF sections - provide for up to 64KB alignment. - - If you don't know what to do, choose 8KB. - -config SPARC64_PAGE_SIZE_64KB - bool "64KB" - -endchoice - config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" depends on SPARC64 && PROC_FS @@ -316,23 +301,6 @@ config GENERIC_LOCKBREAK default y depends on SPARC64 && SMP && PREEMPT -choice - prompt "SPARC64 Huge TLB Page Size" - depends on SPARC64 && HUGETLB_PAGE - default HUGETLB_PAGE_SIZE_4MB - -config HUGETLB_PAGE_SIZE_4MB - bool "4MB" - -config HUGETLB_PAGE_SIZE_512K - bool "512K" - -config HUGETLB_PAGE_SIZE_64K - depends on !SPARC64_PAGE_SIZE_64KB - bool "64K" - -endchoice - config NUMA bool "NUMA support" depends on SPARC64 && SMP @@ -571,6 +539,7 @@ config COMPAT depends on SPARC64 default y select COMPAT_BINFMT_ELF + select HAVE_UID16 select ARCH_WANT_OLD_COMPAT_IPC config SYSVIPC_COMPAT diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h index 177061064ee6..8c5eed6d267f 100644 --- a/arch/sparc/include/asm/hugetlb.h +++ b/arch/sparc/include/asm/hugetlb.h @@ -10,7 +10,10 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep); -void hugetlb_prefault_arch_hook(struct mm_struct *mm); +static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) +{ + hugetlb_setup(mm); +} static inline int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, @@ -82,4 +85,8 @@ static inline void arch_release_hugepage(struct page *page) { } +static inline void arch_clear_hugepage_flags(struct page *page) +{ +} + #endif /* _ASM_SPARC64_HUGETLB_H */ diff --git a/arch/sparc/include/asm/mmu_64.h b/arch/sparc/include/asm/mmu_64.h index 9067dc500535..76092c4dd277 100644 --- a/arch/sparc/include/asm/mmu_64.h +++ b/arch/sparc/include/asm/mmu_64.h @@ -30,22 +30,8 @@ #define CTX_PGSZ_MASK ((CTX_PGSZ_BITS << CTX_PGSZ0_SHIFT) | \ (CTX_PGSZ_BITS << CTX_PGSZ1_SHIFT)) -#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) #define CTX_PGSZ_BASE CTX_PGSZ_8KB -#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) -#define CTX_PGSZ_BASE CTX_PGSZ_64KB -#else -#error No page size specified in kernel configuration -#endif - -#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) -#define CTX_PGSZ_HUGE CTX_PGSZ_4MB -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) -#define CTX_PGSZ_HUGE CTX_PGSZ_512KB -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) -#define CTX_PGSZ_HUGE CTX_PGSZ_64KB -#endif - +#define CTX_PGSZ_HUGE CTX_PGSZ_4MB #define CTX_PGSZ_KERN CTX_PGSZ_4MB /* Thus, when running on UltraSPARC-III+ and later, we use the following @@ -96,7 +82,7 @@ struct tsb_config { #define MM_TSB_BASE 0 -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) #define MM_TSB_HUGE 1 #define MM_NUM_TSBS 2 #else @@ -107,6 +93,7 @@ typedef struct { spinlock_t lock; unsigned long sparc64_ctx_val; unsigned long huge_pte_count; + struct page *pgtable_page; struct tsb_config tsb_block[MM_NUM_TSBS]; struct hv_tsb_descr tsb_descr[MM_NUM_TSBS]; } mm_context_t; diff --git a/arch/sparc/include/asm/mmu_context_64.h b/arch/sparc/include/asm/mmu_context_64.h index a97fd085cebe..9191ca62ed9c 100644 --- a/arch/sparc/include/asm/mmu_context_64.h +++ b/arch/sparc/include/asm/mmu_context_64.h @@ -36,7 +36,7 @@ static inline void tsb_context_switch(struct mm_struct *mm) { __tsb_context_switch(__pa(mm->pgd), &mm->context.tsb_block[0], -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) (mm->context.tsb_block[1].tsb ? &mm->context.tsb_block[1] : NULL) diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h index f0d09b401036..4b39f74d6ca0 100644 --- a/arch/sparc/include/asm/page_64.h +++ b/arch/sparc/include/asm/page_64.h @@ -3,13 +3,7 @@ #include <linux/const.h> -#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) #define PAGE_SHIFT 13 -#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) -#define PAGE_SHIFT 16 -#else -#error No page size specified in kernel configuration -#endif #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) @@ -21,15 +15,9 @@ #define DCACHE_ALIASING_POSSIBLE #endif -#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) #define HPAGE_SHIFT 22 -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) -#define HPAGE_SHIFT 19 -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) -#define HPAGE_SHIFT 16 -#endif -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) @@ -38,6 +26,11 @@ #ifndef __ASSEMBLY__ +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) +struct mm_struct; +extern void hugetlb_setup(struct mm_struct *mm); +#endif + #define WANT_PAGE_VIRTUAL extern void _clear_page(void *page); @@ -98,7 +91,7 @@ typedef unsigned long pgprot_t; #endif /* (STRICT_MM_TYPECHECKS) */ -typedef struct page *pgtable_t; +typedef pte_t *pgtable_t; #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ (_AC(0x0000000070000000,UL)) : \ diff --git a/arch/sparc/include/asm/pgalloc_64.h b/arch/sparc/include/asm/pgalloc_64.h index 40b2d7a7023d..bcfe063bce23 100644 --- a/arch/sparc/include/asm/pgalloc_64.h +++ b/arch/sparc/include/asm/pgalloc_64.h @@ -38,51 +38,20 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) kmem_cache_free(pgtable_cache, pmd); } -static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, - unsigned long address) -{ - return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); -} - -static inline pgtable_t pte_alloc_one(struct mm_struct *mm, - unsigned long address) -{ - struct page *page; - pte_t *pte; - - pte = pte_alloc_one_kernel(mm, address); - if (!pte) - return NULL; - page = virt_to_page(pte); - pgtable_page_ctor(page); - return page; -} - -static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) -{ - free_page((unsigned long)pte); -} - -static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) -{ - pgtable_page_dtor(ptepage); - __free_page(ptepage); -} +extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address); +extern pgtable_t pte_alloc_one(struct mm_struct *mm, + unsigned long address); +extern void pte_free_kernel(struct mm_struct *mm, pte_t *pte); +extern void pte_free(struct mm_struct *mm, pgtable_t ptepage); -#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE) -#define pmd_populate(MM,PMD,PTE_PAGE) \ - pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE)) -#define pmd_pgtable(pmd) pmd_page(pmd) +#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(MM, PMD, PTE) +#define pmd_populate(MM, PMD, PTE) pmd_set(MM, PMD, PTE) +#define pmd_pgtable(PMD) ((pte_t *)__pmd_page(PMD)) #define check_pgt_cache() do { } while (0) -static inline void pgtable_free(void *table, bool is_page) -{ - if (is_page) - free_page((unsigned long)table); - else - kmem_cache_free(pgtable_cache, table); -} +extern void pgtable_free(void *table, bool is_page); #ifdef CONFIG_SMP @@ -113,11 +82,10 @@ static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is } #endif /* !CONFIG_SMP */ -static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage, +static inline void __pte_free_tlb(struct mmu_gather *tlb, pte_t *pte, unsigned long address) { - pgtable_page_dtor(ptepage); - pgtable_free_tlb(tlb, page_address(ptepage), true); + pgtable_free_tlb(tlb, pte, true); } #define __pmd_free_tlb(tlb, pmd, addr) \ diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index 61210db139fb..95515f1e7cef 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -45,40 +45,59 @@ #define vmemmap ((struct page *)VMEMMAP_BASE) -/* XXX All of this needs to be rethought so we can take advantage - * XXX cheetah's full 64-bit virtual address space, ie. no more hole - * XXX in the middle like on spitfire. -DaveM - */ -/* - * Given a virtual address, the lowest PAGE_SHIFT bits determine offset - * into the page; the next higher PAGE_SHIFT-3 bits determine the pte# - * in the proper pagetable (the -3 is from the 8 byte ptes, and each page - * table is a single page long). The next higher PMD_BITS determine pmd# - * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2) - * since the pmd entries are 4 bytes, and each pmd page is a single page - * long). Finally, the higher few bits determine pgde#. - */ - /* PMD_SHIFT determines the size of the area a second-level page * table can map */ -#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) +#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-4)) #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) #define PMD_MASK (~(PMD_SIZE-1)) #define PMD_BITS (PAGE_SHIFT - 2) /* PGDIR_SHIFT determines what a third-level page table entry can map */ -#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS) +#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-4) + PMD_BITS) #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) #define PGDIR_BITS (PAGE_SHIFT - 2) +#if (PGDIR_SHIFT + PGDIR_BITS) != 44 +#error Page table parameters do not cover virtual address space properly. +#endif + +#if (PMD_SHIFT != HPAGE_SHIFT) +#error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages. +#endif + +/* PMDs point to PTE tables which are 4K aligned. */ +#define PMD_PADDR _AC(0xfffffffe,UL) +#define PMD_PADDR_SHIFT _AC(11,UL) + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#define PMD_ISHUGE _AC(0x00000001,UL) + +/* This is the PMD layout when PMD_ISHUGE is set. With 4MB huge + * pages, this frees up a bunch of bits in the layout that we can + * use for the protection settings and software metadata. + */ +#define PMD_HUGE_PADDR _AC(0xfffff800,UL) +#define PMD_HUGE_PROTBITS _AC(0x000007ff,UL) +#define PMD_HUGE_PRESENT _AC(0x00000400,UL) +#define PMD_HUGE_WRITE _AC(0x00000200,UL) +#define PMD_HUGE_DIRTY _AC(0x00000100,UL) +#define PMD_HUGE_ACCESSED _AC(0x00000080,UL) +#define PMD_HUGE_EXEC _AC(0x00000040,UL) +#define PMD_HUGE_SPLITTING _AC(0x00000020,UL) +#endif + +/* PGDs point to PMD tables which are 8K aligned. */ +#define PGD_PADDR _AC(0xfffffffc,UL) +#define PGD_PADDR_SHIFT _AC(11,UL) + #ifndef __ASSEMBLY__ #include <linux/sched.h> /* Entries per page directory level. */ -#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3)) +#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-4)) #define PTRS_PER_PMD (1UL << PMD_BITS) #define PTRS_PER_PGD (1UL << PGDIR_BITS) @@ -160,26 +179,11 @@ #define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */ #define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */ -#if PAGE_SHIFT == 13 #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V -#elif PAGE_SHIFT == 16 -#define _PAGE_SZBITS_4U _PAGE_SZ64K_4U -#define _PAGE_SZBITS_4V _PAGE_SZ64K_4V -#else -#error Wrong PAGE_SHIFT specified -#endif -#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) -#define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U -#define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) -#define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U -#define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V -#endif /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */ #define __P000 __pgprot(0) @@ -218,7 +222,6 @@ extern unsigned long _PAGE_CACHE; extern unsigned long pg_iobits; extern unsigned long _PAGE_ALL_SZ_BITS; -extern unsigned long _PAGE_SZBITS; extern struct page *mem_map_zero; #define ZERO_PAGE(vaddr) (mem_map_zero) @@ -231,25 +234,25 @@ extern struct page *mem_map_zero; static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot) { unsigned long paddr = pfn << PAGE_SHIFT; - unsigned long sz_bits; - - sz_bits = 0UL; - if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) { - __asm__ __volatile__( - "\n661: sethi %%uhi(%1), %0\n" - " sllx %0, 32, %0\n" - " .section .sun4v_2insn_patch, \"ax\"\n" - " .word 661b\n" - " mov %2, %0\n" - " nop\n" - " .previous\n" - : "=r" (sz_bits) - : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V)); - } - return __pte(paddr | sz_bits | pgprot_val(prot)); + + BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL); + return __pte(paddr | pgprot_val(prot)); } #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +extern pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot); +#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) + +extern pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot); + +static inline pmd_t pmd_mkhuge(pmd_t pmd) +{ + /* Do nothing, mk_pmd() does this part. */ + return pmd; +} +#endif + /* This one can be done with two shifts. */ static inline unsigned long pte_pfn(pte_t pte) { @@ -286,6 +289,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t prot) * Note: We encode this into 3 sun4v 2-insn patch sequences. */ + BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL); __asm__ __volatile__( "\n661: sethi %%uhi(%2), %1\n" " sethi %%hi(%2), %0\n" @@ -307,10 +311,10 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t prot) : "=r" (mask), "=r" (tmp) : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U | _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U | - _PAGE_SZBITS_4U | _PAGE_SPECIAL), + _PAGE_SPECIAL), "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V | - _PAGE_SZBITS_4V | _PAGE_SPECIAL)); + _PAGE_SPECIAL)); return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask)); } @@ -618,19 +622,130 @@ static inline unsigned long pte_special(pte_t pte) return pte_val(pte) & _PAGE_SPECIAL; } -#define pmd_set(pmdp, ptep) \ - (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL)) +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +static inline int pmd_young(pmd_t pmd) +{ + return pmd_val(pmd) & PMD_HUGE_ACCESSED; +} + +static inline int pmd_write(pmd_t pmd) +{ + return pmd_val(pmd) & PMD_HUGE_WRITE; +} + +static inline unsigned long pmd_pfn(pmd_t pmd) +{ + unsigned long val = pmd_val(pmd) & PMD_HUGE_PADDR; + + return val >> (PAGE_SHIFT - PMD_PADDR_SHIFT); +} + +static inline int pmd_large(pmd_t pmd) +{ + return (pmd_val(pmd) & (PMD_ISHUGE | PMD_HUGE_PRESENT)) == + (PMD_ISHUGE | PMD_HUGE_PRESENT); +} + +static inline int pmd_trans_splitting(pmd_t pmd) +{ + return (pmd_val(pmd) & (PMD_ISHUGE|PMD_HUGE_SPLITTING)) == + (PMD_ISHUGE|PMD_HUGE_SPLITTING); +} + +static inline int pmd_trans_huge(pmd_t pmd) +{ + return pmd_val(pmd) & PMD_ISHUGE; +} + +#define has_transparent_hugepage() 1 + +static inline pmd_t pmd_mkold(pmd_t pmd) +{ + pmd_val(pmd) &= ~PMD_HUGE_ACCESSED; + return pmd; +} + +static inline pmd_t pmd_wrprotect(pmd_t pmd) +{ + pmd_val(pmd) &= ~PMD_HUGE_WRITE; + return pmd; +} + +static inline pmd_t pmd_mkdirty(pmd_t pmd) +{ + pmd_val(pmd) |= PMD_HUGE_DIRTY; + return pmd; +} + +static inline pmd_t pmd_mkyoung(pmd_t pmd) +{ + pmd_val(pmd) |= PMD_HUGE_ACCESSED; + return pmd; +} + +static inline pmd_t pmd_mkwrite(pmd_t pmd) +{ + pmd_val(pmd) |= PMD_HUGE_WRITE; + return pmd; +} + +static inline pmd_t pmd_mknotpresent(pmd_t pmd) +{ + pmd_val(pmd) &= ~PMD_HUGE_PRESENT; + return pmd; +} + +static inline pmd_t pmd_mksplitting(pmd_t pmd) +{ + pmd_val(pmd) |= PMD_HUGE_SPLITTING; + return pmd; +} + +extern pgprot_t pmd_pgprot(pmd_t entry); +#endif + +static inline int pmd_present(pmd_t pmd) +{ + return pmd_val(pmd) != 0U; +} + +#define pmd_none(pmd) (!pmd_val(pmd)) + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd); +#else +static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd) +{ + *pmdp = pmd; +} +#endif + +static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) +{ + unsigned long val = __pa((unsigned long) (ptep)) >> PMD_PADDR_SHIFT; + + pmd_val(*pmdp) = val; +} + #define pud_set(pudp, pmdp) \ - (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL)) -#define __pmd_page(pmd) \ - ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL))) + (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> PGD_PADDR_SHIFT)) +static inline unsigned long __pmd_page(pmd_t pmd) +{ + unsigned long paddr = (unsigned long) pmd_val(pmd); +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + if (pmd_val(pmd) & PMD_ISHUGE) + paddr &= PMD_HUGE_PADDR; +#endif + paddr <<= PMD_PADDR_SHIFT; + return ((unsigned long) __va(paddr)); +} #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) #define pud_page_vaddr(pud) \ - ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL))) + ((unsigned long) __va((((unsigned long)pud_val(pud))<<PGD_PADDR_SHIFT))) #define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud)) -#define pmd_none(pmd) (!pmd_val(pmd)) #define pmd_bad(pmd) (0) -#define pmd_present(pmd) (pmd_val(pmd) != 0U) #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U) #define pud_none(pud) (!pud_val(pud)) #define pud_bad(pud) (0) @@ -664,6 +779,16 @@ static inline unsigned long pte_special(pte_t pte) extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig, int fullmm); +#define __HAVE_ARCH_PMDP_GET_AND_CLEAR +static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, + unsigned long addr, + pmd_t *pmdp) +{ + pmd_t pmd = *pmdp; + set_pmd_at(mm, addr, pmdp, __pmd(0U)); + return pmd; +} + static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte, int fullmm) { @@ -719,6 +844,16 @@ extern void mmu_info(struct seq_file *); struct vm_area_struct; extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, + pmd_t *pmd); + +#define __HAVE_ARCH_PGTABLE_DEPOSIT +extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable); + +#define __HAVE_ARCH_PGTABLE_WITHDRAW +extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm); +#endif /* Encode and de-code a swap entry */ #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) diff --git a/arch/sparc/include/asm/tsb.h b/arch/sparc/include/asm/tsb.h index 1a8afd1ad04f..b4c258de4443 100644 --- a/arch/sparc/include/asm/tsb.h +++ b/arch/sparc/include/asm/tsb.h @@ -147,20 +147,96 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; brz,pn REG1, FAIL_LABEL; \ sllx VADDR, 64 - (PMD_SHIFT + PMD_BITS), REG2; \ srlx REG2, 64 - PAGE_SHIFT, REG2; \ - sllx REG1, 11, REG1; \ + sllx REG1, PGD_PADDR_SHIFT, REG1; \ andn REG2, 0x3, REG2; \ lduwa [REG1 + REG2] ASI_PHYS_USE_EC, REG1; \ brz,pn REG1, FAIL_LABEL; \ sllx VADDR, 64 - PMD_SHIFT, REG2; \ - srlx REG2, 64 - PAGE_SHIFT, REG2; \ - sllx REG1, 11, REG1; \ + srlx REG2, 64 - (PAGE_SHIFT - 1), REG2; \ + sllx REG1, PMD_PADDR_SHIFT, REG1; \ andn REG2, 0x7, REG2; \ add REG1, REG2, REG1; - /* Do a user page table walk in MMU globals. Leaves physical PTE - * pointer in REG1. Jumps to FAIL_LABEL on early page table walk - * termination. Physical base of page tables is in PHYS_PGD which - * will not be modified. + /* This macro exists only to make the PMD translator below easier + * to read. It hides the ELF section switch for the sun4v code + * patching. + */ +#define OR_PTE_BIT(REG, NAME) \ +661: or REG, _PAGE_##NAME##_4U, REG; \ + .section .sun4v_1insn_patch, "ax"; \ + .word 661b; \ + or REG, _PAGE_##NAME##_4V, REG; \ + .previous; + + /* Load into REG the PTE value for VALID, CACHE, and SZHUGE. */ +#define BUILD_PTE_VALID_SZHUGE_CACHE(REG) \ +661: sethi %uhi(_PAGE_VALID|_PAGE_SZHUGE_4U), REG; \ + .section .sun4v_1insn_patch, "ax"; \ + .word 661b; \ + sethi %uhi(_PAGE_VALID), REG; \ + .previous; \ + sllx REG, 32, REG; \ +661: or REG, _PAGE_CP_4U|_PAGE_CV_4U, REG; \ + .section .sun4v_1insn_patch, "ax"; \ + .word 661b; \ + or REG, _PAGE_CP_4V|_PAGE_CV_4V|_PAGE_SZHUGE_4V, REG; \ + .previous; + + /* PMD has been loaded into REG1, interpret the value, seeing + * if it is a HUGE PMD or a normal one. If it is not valid + * then jump to FAIL_LABEL. If it is a HUGE PMD, and it + * translates to a valid PTE, branch to PTE_LABEL. + * + * We translate the PMD by hand, one bit at a time, + * constructing the huge PTE. + * + * So we construct the PTE in REG2 as follows: + * + * 1) Extract the PMD PFN from REG1 and place it into REG2. + * + * 2) Translate PMD protection bits in REG1 into REG2, one bit + * at a time using andcc tests on REG1 and OR's into REG2. + * + * Only two bits to be concerned with here, EXEC and WRITE. + * Now REG1 is freed up and we can use it as a temporary. + * + * 3) Construct the VALID, CACHE, and page size PTE bits in + * REG1, OR with REG2 to form final PTE. + */ +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#define USER_PGTABLE_CHECK_PMD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, PTE_LABEL) \ + brz,pn REG1, FAIL_LABEL; \ + andcc REG1, PMD_ISHUGE, %g0; \ + be,pt %xcc, 700f; \ + and REG1, PMD_HUGE_PRESENT|PMD_HUGE_ACCESSED, REG2; \ + cmp REG2, PMD_HUGE_PRESENT|PMD_HUGE_ACCESSED; \ + bne,pn %xcc, FAIL_LABEL; \ + andn REG1, PMD_HUGE_PROTBITS, REG2; \ + sllx REG2, PMD_PADDR_SHIFT, REG2; \ + /* REG2 now holds PFN << PAGE_SHIFT */ \ + andcc REG1, PMD_HUGE_EXEC, %g0; \ + bne,a,pt %xcc, 1f; \ + OR_PTE_BIT(REG2, EXEC); \ +1: andcc REG1, PMD_HUGE_WRITE, %g0; \ + bne,a,pt %xcc, 1f; \ + OR_PTE_BIT(REG2, W); \ + /* REG1 can now be clobbered, build final PTE */ \ +1: BUILD_PTE_VALID_SZHUGE_CACHE(REG1); \ + ba,pt %xcc, PTE_LABEL; \ + or REG1, REG2, REG1; \ +700: +#else +#define USER_PGTABLE_CHECK_PMD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, PTE_LABEL) \ + brz,pn REG1, FAIL_LABEL; \ + nop; +#endif + + /* Do a user page table walk in MMU globals. Leaves final, + * valid, PTE value in REG1. Jumps to FAIL_LABEL on early + * page table walk termination or if the PTE is not valid. + * + * Physical base of page tables is in PHYS_PGD which will not + * be modified. * * VADDR will not be clobbered, but REG1 and REG2 will. */ @@ -172,15 +248,19 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; brz,pn REG1, FAIL_LABEL; \ sllx VADDR, 64 - (PMD_SHIFT + PMD_BITS), REG2; \ srlx REG2, 64 - PAGE_SHIFT, REG2; \ - sllx REG1, 11, REG1; \ + sllx REG1, PGD_PADDR_SHIFT, REG1; \ andn REG2, 0x3, REG2; \ lduwa [REG1 + REG2] ASI_PHYS_USE_EC, REG1; \ - brz,pn REG1, FAIL_LABEL; \ - sllx VADDR, 64 - PMD_SHIFT, REG2; \ - srlx REG2, 64 - PAGE_SHIFT, REG2; \ - sllx REG1, 11, REG1; \ + USER_PGTABLE_CHECK_PMD_HUGE(VADDR, REG1, REG2, FAIL_LABEL, 800f) \ + sllx VADDR, 64 - PMD_SHIFT, REG2; \ + srlx REG2, 64 - (PAGE_SHIFT - 1), REG2; \ + sllx REG1, PMD_PADDR_SHIFT, REG1; \ andn REG2, 0x7, REG2; \ - add REG1, REG2, REG1; + add REG1, REG2, REG1; \ + ldxa [REG1] ASI_PHYS_USE_EC, REG1; \ + brgez,pn REG1, FAIL_LABEL; \ + nop; \ +800: /* Lookup a OBP mapping on VADDR in the prom_trans[] table at TL>0. * If no entry is found, FAIL_LABEL will be branched to. On success diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index acc8c838ff72..75b31bcdeadf 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -779,7 +779,7 @@ static int __pci_mmap_make_offset(struct pci_dev *pdev, static void __pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state) { - vma->vm_flags |= (VM_IO | VM_RESERVED); + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; } /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci diff --git a/arch/sparc/kernel/sun4v_tlb_miss.S b/arch/sparc/kernel/sun4v_tlb_miss.S index e1fbf8c75787..bde867fd71e8 100644 --- a/arch/sparc/kernel/sun4v_tlb_miss.S +++ b/arch/sparc/kernel/sun4v_tlb_miss.S @@ -176,7 +176,7 @@ sun4v_tsb_miss_common: sub %g2, TRAP_PER_CPU_FAULT_INFO, %g2 -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) mov SCRATCHPAD_UTSBREG2, %g5 ldxa [%g5] ASI_SCRATCHPAD, %g5 cmp %g5, -1 diff --git a/arch/sparc/kernel/tsb.S b/arch/sparc/kernel/tsb.S index db15d123f054..d4bdc7a62375 100644 --- a/arch/sparc/kernel/tsb.S +++ b/arch/sparc/kernel/tsb.S @@ -49,7 +49,7 @@ tsb_miss_page_table_walk: /* Before committing to a full page table walk, * check the huge page TSB. */ -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 661: ldx [%g7 + TRAP_PER_CPU_TSB_HUGE], %g5 nop @@ -110,12 +110,9 @@ tsb_miss_page_table_walk: tsb_miss_page_table_walk_sun4v_fastpath: USER_PGTABLE_WALK_TL1(%g4, %g7, %g5, %g2, tsb_do_fault) - /* Load and check PTE. */ - ldxa [%g5] ASI_PHYS_USE_EC, %g5 - brgez,pn %g5, tsb_do_fault - nop + /* Valid PTE is now in %g5. */ -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 661: sethi %uhi(_PAGE_SZALL_4U), %g7 sllx %g7, 32, %g7 .section .sun4v_2insn_patch, "ax" diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c index 77ac917be152..e98bfda205a2 100644 --- a/arch/sparc/mm/fault_32.c +++ b/arch/sparc/mm/fault_32.c @@ -265,6 +265,7 @@ good_area: } if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* No need to up_read(&mm->mmap_sem) as we would * have already released it in __lock_page_or_retry diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c index 1fe0429b6314..2976dba1ebaf 100644 --- a/arch/sparc/mm/fault_64.c +++ b/arch/sparc/mm/fault_64.c @@ -452,6 +452,7 @@ good_area: } if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* No need to up_read(&mm->mmap_sem) as we would * have already released it in __lock_page_or_retry @@ -464,13 +465,13 @@ good_area: up_read(&mm->mmap_sem); mm_rss = get_mm_rss(mm); -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) mm_rss -= (mm->context.huge_pte_count * (HPAGE_SIZE / PAGE_SIZE)); #endif if (unlikely(mm_rss > mm->context.tsb_block[MM_TSB_BASE].tsb_rss_limit)) tsb_grow(mm, MM_TSB_BASE, mm_rss); -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) mm_rss = mm->context.huge_pte_count; if (unlikely(mm_rss > mm->context.tsb_block[MM_TSB_HUGE].tsb_rss_limit)) diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c index 07e14535375c..f76f83d5ac63 100644 --- a/arch/sparc/mm/hugetlbpage.c +++ b/arch/sparc/mm/hugetlbpage.c @@ -303,53 +303,3 @@ struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, { return NULL; } - -static void context_reload(void *__data) -{ - struct mm_struct *mm = __data; - - if (mm == current->mm) - load_secondary_context(mm); -} - -void hugetlb_prefault_arch_hook(struct mm_struct *mm) -{ - struct tsb_config *tp = &mm->context.tsb_block[MM_TSB_HUGE]; - - if (likely(tp->tsb != NULL)) - return; - - tsb_grow(mm, MM_TSB_HUGE, 0); - tsb_context_switch(mm); - smp_tsb_sync(mm); - - /* On UltraSPARC-III+ and later, configure the second half of - * the Data-TLB for huge pages. - */ - if (tlb_type == cheetah_plus) { - unsigned long ctx; - - spin_lock(&ctx_alloc_lock); - ctx = mm->context.sparc64_ctx_val; - ctx &= ~CTX_PGSZ_MASK; - ctx |= CTX_PGSZ_BASE << CTX_PGSZ0_SHIFT; - ctx |= CTX_PGSZ_HUGE << CTX_PGSZ1_SHIFT; - - if (ctx != mm->context.sparc64_ctx_val) { - /* When changing the page size fields, we - * must perform a context flush so that no - * stale entries match. This flush must - * occur with the original context register - * settings. - */ - do_flush_tlb_mm(mm); - - /* Reload the context register of all processors - * also executing in this address space. - */ - mm->context.sparc64_ctx_val = ctx; - on_each_cpu(context_reload, mm, 0); - } - spin_unlock(&ctx_alloc_lock); - } -} diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index 7a9b788c6ced..9e28a118e6a4 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -276,7 +276,6 @@ static inline void tsb_insert(struct tsb *ent, unsigned long tag, unsigned long } unsigned long _PAGE_ALL_SZ_BITS __read_mostly; -unsigned long _PAGE_SZBITS __read_mostly; static void flush_dcache(unsigned long pfn) { @@ -307,12 +306,24 @@ static void flush_dcache(unsigned long pfn) } } +/* mm->context.lock must be held */ +static void __update_mmu_tsb_insert(struct mm_struct *mm, unsigned long tsb_index, + unsigned long tsb_hash_shift, unsigned long address, + unsigned long tte) +{ + struct tsb *tsb = mm->context.tsb_block[tsb_index].tsb; + unsigned long tag; + + tsb += ((address >> tsb_hash_shift) & + (mm->context.tsb_block[tsb_index].tsb_nentries - 1UL)); + tag = (address >> 22UL); + tsb_insert(tsb, tag, tte); +} + void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) { + unsigned long tsb_index, tsb_hash_shift, flags; struct mm_struct *mm; - struct tsb *tsb; - unsigned long tag, flags; - unsigned long tsb_index, tsb_hash_shift; pte_t pte = *ptep; if (tlb_type != hypervisor) { @@ -329,7 +340,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t * spin_lock_irqsave(&mm->context.lock, flags); -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) if (mm->context.tsb_block[MM_TSB_HUGE].tsb != NULL) { if ((tlb_type == hypervisor && (pte_val(pte) & _PAGE_SZALL_4V) == _PAGE_SZHUGE_4V) || @@ -341,11 +352,8 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t * } #endif - tsb = mm->context.tsb_block[tsb_index].tsb; - tsb += ((address >> tsb_hash_shift) & - (mm->context.tsb_block[tsb_index].tsb_nentries - 1UL)); - tag = (address >> 22UL); - tsb_insert(tsb, tag, pte_val(pte)); + __update_mmu_tsb_insert(mm, tsb_index, tsb_hash_shift, + address, pte_val(pte)); spin_unlock_irqrestore(&mm->context.lock, flags); } @@ -2275,8 +2283,7 @@ static void __init sun4u_pgprot_init(void) __ACCESS_BITS_4U | _PAGE_E_4U); #ifdef CONFIG_DEBUG_PAGEALLOC - kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4U) ^ - 0xfffff80000000000UL; + kern_linear_pte_xor[0] = _PAGE_VALID ^ 0xfffff80000000000UL; #else kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4U) ^ 0xfffff80000000000UL; @@ -2287,7 +2294,6 @@ static void __init sun4u_pgprot_init(void) for (i = 1; i < 4; i++) kern_linear_pte_xor[i] = kern_linear_pte_xor[0]; - _PAGE_SZBITS = _PAGE_SZBITS_4U; _PAGE_ALL_SZ_BITS = (_PAGE_SZ4MB_4U | _PAGE_SZ512K_4U | _PAGE_SZ64K_4U | _PAGE_SZ8K_4U | _PAGE_SZ32MB_4U | _PAGE_SZ256MB_4U); @@ -2324,8 +2330,7 @@ static void __init sun4v_pgprot_init(void) _PAGE_CACHE = _PAGE_CACHE_4V; #ifdef CONFIG_DEBUG_PAGEALLOC - kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^ - 0xfffff80000000000UL; + kern_linear_pte_xor[0] = _PAGE_VALID ^ 0xfffff80000000000UL; #else kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4V) ^ 0xfffff80000000000UL; @@ -2339,7 +2344,6 @@ static void __init sun4v_pgprot_init(void) pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4V | __DIRTY_BITS_4V | __ACCESS_BITS_4V | _PAGE_E_4V); - _PAGE_SZBITS = _PAGE_SZBITS_4V; _PAGE_ALL_SZ_BITS = (_PAGE_SZ16GB_4V | _PAGE_SZ2GB_4V | _PAGE_SZ256MB_4V | _PAGE_SZ32MB_4V | _PAGE_SZ4MB_4V | _PAGE_SZ512K_4V | @@ -2472,3 +2476,281 @@ void __flush_tlb_all(void) __asm__ __volatile__("wrpr %0, 0, %%pstate" : : "r" (pstate)); } + +static pte_t *get_from_cache(struct mm_struct *mm) +{ + struct page *page; + pte_t *ret; + + spin_lock(&mm->page_table_lock); + page = mm->context.pgtable_page; + ret = NULL; + if (page) { + void *p = page_address(page); + + mm->context.pgtable_page = NULL; + + ret = (pte_t *) (p + (PAGE_SIZE / 2)); + } + spin_unlock(&mm->page_table_lock); + + return ret; +} + +static struct page *__alloc_for_cache(struct mm_struct *mm) +{ + struct page *page = alloc_page(GFP_KERNEL | __GFP_NOTRACK | + __GFP_REPEAT | __GFP_ZERO); + + if (page) { + spin_lock(&mm->page_table_lock); + if (!mm->context.pgtable_page) { + atomic_set(&page->_count, 2); + mm->context.pgtable_page = page; + } + spin_unlock(&mm->page_table_lock); + } + return page; +} + +pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) +{ + struct page *page; + pte_t *pte; + + pte = get_from_cache(mm); + if (pte) + return pte; + + page = __alloc_for_cache(mm); + if (page) + pte = (pte_t *) page_address(page); + + return pte; +} + +pgtable_t pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + struct page *page; + pte_t *pte; + + pte = get_from_cache(mm); + if (pte) + return pte; + + page = __alloc_for_cache(mm); + if (page) { + pgtable_page_ctor(page); + pte = (pte_t *) page_address(page); + } + + return pte; +} + +void pte_free_kernel(struct mm_struct *mm, pte_t *pte) +{ + struct page *page = virt_to_page(pte); + if (put_page_testzero(page)) + free_hot_cold_page(page, 0); +} + +static void __pte_free(pgtable_t pte) +{ + struct page *page = virt_to_page(pte); + if (put_page_testzero(page)) { + pgtable_page_dtor(page); + free_hot_cold_page(page, 0); + } +} + +void pte_free(struct mm_struct *mm, pgtable_t pte) +{ + __pte_free(pte); +} + +void pgtable_free(void *table, bool is_page) +{ + if (is_page) + __pte_free(table); + else + kmem_cache_free(pgtable_cache, table); +} + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +static pmd_t pmd_set_protbits(pmd_t pmd, pgprot_t pgprot, bool for_modify) +{ + if (pgprot_val(pgprot) & _PAGE_VALID) + pmd_val(pmd) |= PMD_HUGE_PRESENT; + if (tlb_type == hypervisor) { + if (pgprot_val(pgprot) & _PAGE_WRITE_4V) + pmd_val(pmd) |= PMD_HUGE_WRITE; + if (pgprot_val(pgprot) & _PAGE_EXEC_4V) + pmd_val(pmd) |= PMD_HUGE_EXEC; + + if (!for_modify) { + if (pgprot_val(pgprot) & _PAGE_ACCESSED_4V) + pmd_val(pmd) |= PMD_HUGE_ACCESSED; + if (pgprot_val(pgprot) & _PAGE_MODIFIED_4V) + pmd_val(pmd) |= PMD_HUGE_DIRTY; + } + } else { + if (pgprot_val(pgprot) & _PAGE_WRITE_4U) + pmd_val(pmd) |= PMD_HUGE_WRITE; + if (pgprot_val(pgprot) & _PAGE_EXEC_4U) + pmd_val(pmd) |= PMD_HUGE_EXEC; + + if (!for_modify) { + if (pgprot_val(pgprot) & _PAGE_ACCESSED_4U) + pmd_val(pmd) |= PMD_HUGE_ACCESSED; + if (pgprot_val(pgprot) & _PAGE_MODIFIED_4U) + pmd_val(pmd) |= PMD_HUGE_DIRTY; + } + } + + return pmd; +} + +pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) +{ + pmd_t pmd; + + pmd_val(pmd) = (page_nr << ((PAGE_SHIFT - PMD_PADDR_SHIFT))); + pmd_val(pmd) |= PMD_ISHUGE; + pmd = pmd_set_protbits(pmd, pgprot, false); + return pmd; +} + +pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) +{ + pmd_val(pmd) &= ~(PMD_HUGE_PRESENT | + PMD_HUGE_WRITE | + PMD_HUGE_EXEC); + pmd = pmd_set_protbits(pmd, newprot, true); + return pmd; +} + +pgprot_t pmd_pgprot(pmd_t entry) +{ + unsigned long pte = 0; + + if (pmd_val(entry) & PMD_HUGE_PRESENT) + pte |= _PAGE_VALID; + + if (tlb_type == hypervisor) { + if (pmd_val(entry) & PMD_HUGE_PRESENT) + pte |= _PAGE_PRESENT_4V; + if (pmd_val(entry) & PMD_HUGE_EXEC) + pte |= _PAGE_EXEC_4V; + if (pmd_val(entry) & PMD_HUGE_WRITE) + pte |= _PAGE_W_4V; + if (pmd_val(entry) & PMD_HUGE_ACCESSED) + pte |= _PAGE_ACCESSED_4V; + if (pmd_val(entry) & PMD_HUGE_DIRTY) + pte |= _PAGE_MODIFIED_4V; + pte |= _PAGE_CP_4V|_PAGE_CV_4V; + } else { + if (pmd_val(entry) & PMD_HUGE_PRESENT) + pte |= _PAGE_PRESENT_4U; + if (pmd_val(entry) & PMD_HUGE_EXEC) + pte |= _PAGE_EXEC_4U; + if (pmd_val(entry) & PMD_HUGE_WRITE) + pte |= _PAGE_W_4U; + if (pmd_val(entry) & PMD_HUGE_ACCESSED) + pte |= _PAGE_ACCESSED_4U; + if (pmd_val(entry) & PMD_HUGE_DIRTY) + pte |= _PAGE_MODIFIED_4U; + pte |= _PAGE_CP_4U|_PAGE_CV_4U; + } + + return __pgprot(pte); +} + +void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, + pmd_t *pmd) +{ + unsigned long pte, flags; + struct mm_struct *mm; + pmd_t entry = *pmd; + pgprot_t prot; + + if (!pmd_large(entry) || !pmd_young(entry)) + return; + + pte = (pmd_val(entry) & ~PMD_HUGE_PROTBITS); + pte <<= PMD_PADDR_SHIFT; + pte |= _PAGE_VALID; + + prot = pmd_pgprot(entry); + + if (tlb_type == hypervisor) + pgprot_val(prot) |= _PAGE_SZHUGE_4V; + else + pgprot_val(prot) |= _PAGE_SZHUGE_4U; + + pte |= pgprot_val(prot); + + mm = vma->vm_mm; + + spin_lock_irqsave(&mm->context.lock, flags); + + if (mm->context.tsb_block[MM_TSB_HUGE].tsb != NULL) + __update_mmu_tsb_insert(mm, MM_TSB_HUGE, HPAGE_SHIFT, + addr, pte); + + spin_unlock_irqrestore(&mm->context.lock, flags); +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ + +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) +static void context_reload(void *__data) +{ + struct mm_struct *mm = __data; + + if (mm == current->mm) + load_secondary_context(mm); +} + +void hugetlb_setup(struct mm_struct *mm) +{ + struct tsb_config *tp = &mm->context.tsb_block[MM_TSB_HUGE]; + + if (likely(tp->tsb != NULL)) + return; + + tsb_grow(mm, MM_TSB_HUGE, 0); + tsb_context_switch(mm); + smp_tsb_sync(mm); + + /* On UltraSPARC-III+ and later, configure the second half of + * the Data-TLB for huge pages. + */ + if (tlb_type == cheetah_plus) { + unsigned long ctx; + + spin_lock(&ctx_alloc_lock); + ctx = mm->context.sparc64_ctx_val; + ctx &= ~CTX_PGSZ_MASK; + ctx |= CTX_PGSZ_BASE << CTX_PGSZ0_SHIFT; + ctx |= CTX_PGSZ_HUGE << CTX_PGSZ1_SHIFT; + + if (ctx != mm->context.sparc64_ctx_val) { + /* When changing the page size fields, we + * must perform a context flush so that no + * stale entries match. This flush must + * occur with the original context register + * settings. + */ + do_flush_tlb_mm(mm); + + /* Reload the context register of all processors + * also executing in this address space. + */ + mm->context.sparc64_ctx_val = ctx; + on_each_cpu(context_reload, mm, 0); + } + spin_unlock(&ctx_alloc_lock); + } +} +#endif diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c index b1f279cd00bf..3e8fec391fe0 100644 --- a/arch/sparc/mm/tlb.c +++ b/arch/sparc/mm/tlb.c @@ -43,16 +43,37 @@ void flush_tlb_pending(void) put_cpu_var(tlb_batch); } -void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, - pte_t *ptep, pte_t orig, int fullmm) +static void tlb_batch_add_one(struct mm_struct *mm, unsigned long vaddr, + bool exec) { struct tlb_batch *tb = &get_cpu_var(tlb_batch); unsigned long nr; vaddr &= PAGE_MASK; - if (pte_exec(orig)) + if (exec) vaddr |= 0x1UL; + nr = tb->tlb_nr; + + if (unlikely(nr != 0 && mm != tb->mm)) { + flush_tlb_pending(); + nr = 0; + } + + if (nr == 0) + tb->mm = mm; + + tb->vaddrs[nr] = vaddr; + tb->tlb_nr = ++nr; + if (nr >= TLB_BATCH_NR) + flush_tlb_pending(); + + put_cpu_var(tlb_batch); +} + +void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, + pte_t *ptep, pte_t orig, int fullmm) +{ if (tlb_type != hypervisor && pte_dirty(orig)) { unsigned long paddr, pfn = pte_pfn(orig); @@ -77,26 +98,91 @@ void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, } no_cache_flush: + if (!fullmm) + tlb_batch_add_one(mm, vaddr, pte_exec(orig)); +} + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +static void tlb_batch_pmd_scan(struct mm_struct *mm, unsigned long vaddr, + pmd_t pmd, bool exec) +{ + unsigned long end; + pte_t *pte; + + pte = pte_offset_map(&pmd, vaddr); + end = vaddr + HPAGE_SIZE; + while (vaddr < end) { + if (pte_val(*pte) & _PAGE_VALID) + tlb_batch_add_one(mm, vaddr, exec); + pte++; + vaddr += PAGE_SIZE; + } + pte_unmap(pte); +} - if (fullmm) { - put_cpu_var(tlb_batch); +void set_pmd_at(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd) +{ + pmd_t orig = *pmdp; + + *pmdp = pmd; + + if (mm == &init_mm) return; + + if ((pmd_val(pmd) ^ pmd_val(orig)) & PMD_ISHUGE) { + if (pmd_val(pmd) & PMD_ISHUGE) + mm->context.huge_pte_count++; + else + mm->context.huge_pte_count--; + if (mm->context.huge_pte_count == 1) + hugetlb_setup(mm); } - nr = tb->tlb_nr; + if (!pmd_none(orig)) { + bool exec = ((pmd_val(orig) & PMD_HUGE_EXEC) != 0); - if (unlikely(nr != 0 && mm != tb->mm)) { - flush_tlb_pending(); - nr = 0; + addr &= HPAGE_MASK; + if (pmd_val(orig) & PMD_ISHUGE) + tlb_batch_add_one(mm, addr, exec); + else + tlb_batch_pmd_scan(mm, addr, orig, exec); } +} - if (nr == 0) - tb->mm = mm; +void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable) +{ + struct list_head *lh = (struct list_head *) pgtable; - tb->vaddrs[nr] = vaddr; - tb->tlb_nr = ++nr; - if (nr >= TLB_BATCH_NR) - flush_tlb_pending(); + assert_spin_locked(&mm->page_table_lock); - put_cpu_var(tlb_batch); + /* FIFO */ + if (!mm->pmd_huge_pte) + INIT_LIST_HEAD(lh); + else + list_add(lh, (struct list_head *) mm->pmd_huge_pte); + mm->pmd_huge_pte = pgtable; +} + +pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm) +{ + struct list_head *lh; + pgtable_t pgtable; + + assert_spin_locked(&mm->page_table_lock); + + /* FIFO */ + pgtable = mm->pmd_huge_pte; + lh = (struct list_head *) pgtable; + if (list_empty(lh)) + mm->pmd_huge_pte = NULL; + else { + mm->pmd_huge_pte = (pgtable_t) lh->next; + list_del(lh); + } + pte_val(pgtable[0]) = 0; + pte_val(pgtable[1]) = 0; + + return pgtable; } +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c index c52add79b83d..7f6474347491 100644 --- a/arch/sparc/mm/tsb.c +++ b/arch/sparc/mm/tsb.c @@ -78,7 +78,7 @@ void flush_tsb_user(struct tlb_batch *tb) base = __pa(base); __flush_tsb_one(tb, PAGE_SHIFT, base, nentries); -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) if (mm->context.tsb_block[MM_TSB_HUGE].tsb) { base = (unsigned long) mm->context.tsb_block[MM_TSB_HUGE].tsb; nentries = mm->context.tsb_block[MM_TSB_HUGE].tsb_nentries; @@ -90,29 +90,12 @@ void flush_tsb_user(struct tlb_batch *tb) spin_unlock_irqrestore(&mm->context.lock, flags); } -#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) #define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_8K #define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_8K -#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) -#define HV_PGSZ_IDX_BASE HV_PGSZ_IDX_64K -#define HV_PGSZ_MASK_BASE HV_PGSZ_MASK_64K -#else -#error Broken base page size setting... -#endif -#ifdef CONFIG_HUGETLB_PAGE -#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) -#define HV_PGSZ_IDX_HUGE HV_PGSZ_IDX_64K -#define HV_PGSZ_MASK_HUGE HV_PGSZ_MASK_64K -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) -#define HV_PGSZ_IDX_HUGE HV_PGSZ_IDX_512K -#define HV_PGSZ_MASK_HUGE HV_PGSZ_MASK_512K -#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) #define HV_PGSZ_IDX_HUGE HV_PGSZ_IDX_4MB #define HV_PGSZ_MASK_HUGE HV_PGSZ_MASK_4MB -#else -#error Broken huge page size setting... -#endif #endif static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_idx, unsigned long tsb_bytes) @@ -207,7 +190,7 @@ static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_idx, unsign case MM_TSB_BASE: hp->pgsz_idx = HV_PGSZ_IDX_BASE; break; -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) case MM_TSB_HUGE: hp->pgsz_idx = HV_PGSZ_IDX_HUGE; break; @@ -222,7 +205,7 @@ static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_idx, unsign case MM_TSB_BASE: hp->pgsz_mask = HV_PGSZ_MASK_BASE; break; -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) case MM_TSB_HUGE: hp->pgsz_mask = HV_PGSZ_MASK_HUGE; break; @@ -444,7 +427,7 @@ retry_tsb_alloc: int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) unsigned long huge_pte_count; #endif unsigned int i; @@ -453,7 +436,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) mm->context.sparc64_ctx_val = 0UL; -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) /* We reset it to zero because the fork() page copying * will re-increment the counters as the parent PTEs are * copied into the child address space. @@ -462,6 +445,8 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) mm->context.huge_pte_count = 0; #endif + mm->context.pgtable_page = NULL; + /* copy_mm() copies over the parent's mm_struct before calling * us, so we need to zero out the TSB pointer or else tsb_grow() * will be confused and think there is an older TSB to free up. @@ -474,7 +459,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) */ tsb_grow(mm, MM_TSB_BASE, get_mm_rss(mm)); -#ifdef CONFIG_HUGETLB_PAGE +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) if (unlikely(huge_pte_count)) tsb_grow(mm, MM_TSB_HUGE, huge_pte_count); #endif @@ -500,10 +485,17 @@ static void tsb_destroy_one(struct tsb_config *tp) void destroy_context(struct mm_struct *mm) { unsigned long flags, i; + struct page *page; for (i = 0; i < MM_NUM_TSBS; i++) tsb_destroy_one(&mm->context.tsb_block[i]); + page = mm->context.pgtable_page; + if (page && put_page_testzero(page)) { + pgtable_page_dtor(page); + free_hot_cold_page(page, 0); + } + spin_lock_irqsave(&ctx_alloc_lock, flags); if (CTX_VALID(mm->context)) { diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index c9a3c1fe7297..dc46490adca0 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -7,12 +7,15 @@ config TILE select HAVE_DMA_API_DEBUG select HAVE_KVM if !TILEGX select GENERIC_FIND_FIRST_BIT + select SYSCTL_EXCEPTION_TRACE select USE_GENERIC_SMP_HELPERS select CC_OPTIMIZE_FOR_SIZE + select HAVE_DEBUG_KMEMLEAK select HAVE_GENERIC_HARDIRQS select GENERIC_IRQ_PROBE select GENERIC_PENDING_IRQ if SMP select GENERIC_IRQ_SHOW + select HAVE_DEBUG_BUGVERBOSE select HAVE_SYSCALL_WRAPPERS if TILEGX select SYS_HYPERVISOR select ARCH_HAVE_NMI_SAFE_CMPXCHG diff --git a/arch/tile/include/asm/hugetlb.h b/arch/tile/include/asm/hugetlb.h index b2042380a5aa..0f885af2b621 100644 --- a/arch/tile/include/asm/hugetlb.h +++ b/arch/tile/include/asm/hugetlb.h @@ -106,6 +106,10 @@ static inline void arch_release_hugepage(struct page *page) { } +static inline void arch_clear_hugepage_flags(struct page *page) +{ +} + #ifdef CONFIG_HUGETLB_SUPER_PAGES static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, struct page *page, int writable) diff --git a/arch/tile/mm/elf.c b/arch/tile/mm/elf.c index 758b6038c2b7..3cfa98bf9125 100644 --- a/arch/tile/mm/elf.c +++ b/arch/tile/mm/elf.c @@ -36,19 +36,14 @@ static void sim_notify_exec(const char *binary_name) } while (c); } -static int notify_exec(void) +static int notify_exec(struct mm_struct *mm) { int retval = 0; /* failure */ - struct vm_area_struct *vma = current->mm->mmap; - while (vma) { - if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) - break; - vma = vma->vm_next; - } - if (vma) { + + if (mm->exe_file) { char *buf = (char *) __get_free_page(GFP_KERNEL); if (buf) { - char *path = d_path(&vma->vm_file->f_path, + char *path = d_path(&mm->exe_file->f_path, buf, PAGE_SIZE); if (!IS_ERR(path)) { sim_notify_exec(path); @@ -106,16 +101,16 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, unsigned long vdso_base; int retval = 0; + down_write(&mm->mmap_sem); + /* * Notify the simulator that an exec just occurred. * If we can't find the filename of the mapping, just use * whatever was passed as the linux_binprm filename. */ - if (!notify_exec()) + if (!notify_exec(mm)) sim_notify_exec(bprm->filename); - down_write(&mm->mmap_sem); - /* * MAYWRITE to allow gdb to COW and set breakpoints */ diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index 84ce7abbf5af..fe811fa5f1b9 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -454,6 +454,7 @@ good_area: tsk->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* * No need to up_read(&mm->mmap_sem) as we would diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common index cb837c223922..648121b037d5 100644 --- a/arch/um/Kconfig.common +++ b/arch/um/Kconfig.common @@ -7,6 +7,7 @@ config UML bool default y select HAVE_GENERIC_HARDIRQS + select HAVE_UID16 select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES select GENERIC_IO diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 0353b98ae35a..0f00e9c82080 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -89,6 +89,7 @@ good_area: current->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; goto retry; } diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c index b6f0458c3143..b008586dad75 100644 --- a/arch/unicore32/kernel/process.c +++ b/arch/unicore32/kernel/process.c @@ -380,7 +380,7 @@ int vectors_user_mapping(void) return install_special_mapping(mm, 0xffff0000, PAGE_SIZE, VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYEXEC | - VM_RESERVED, + VM_DONTEXPAND | VM_DONTDUMP, NULL); } diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index b72777ff32a9..1ae94bcae5d9 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -10,6 +10,7 @@ config X86_32 def_bool y depends on !64BIT select CLKSRC_I8253 + select HAVE_UID16 config X86_64 def_bool y @@ -46,6 +47,7 @@ config X86 select HAVE_FUNCTION_GRAPH_FP_TEST select HAVE_FUNCTION_TRACE_MCOUNT_TEST select HAVE_SYSCALL_TRACEPOINTS + select SYSCTL_EXCEPTION_TRACE select HAVE_KVM select HAVE_ARCH_KGDB select HAVE_ARCH_TRACEHOOK @@ -65,6 +67,7 @@ config X86 select HAVE_PERF_EVENTS_NMI select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP + select HAVE_DEBUG_KMEMLEAK select ANON_INODES select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386 select HAVE_CMPXCHG_LOCAL if !M386 @@ -85,6 +88,7 @@ config X86 select IRQ_FORCED_THREADING select USE_GENERIC_SMP_HELPERS if SMP select HAVE_BPF_JIT if X86_64 + select HAVE_ARCH_TRANSPARENT_HUGEPAGE select CLKEVT_I8253 select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_IOMAP @@ -2168,6 +2172,7 @@ config IA32_EMULATION bool "IA32 Emulation" depends on X86_64 select COMPAT_BINFMT_ELF + select HAVE_UID16 ---help--- Include code to run legacy 32-bit programs under a 64-bit kernel. You should likely turn this on, unless you're diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 250b8774c158..b6c3b821acf6 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -240,30 +240,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) return c; } - -/* - * atomic_dec_if_positive - decrement by 1 if old value positive - * @v: pointer of type atomic_t - * - * The function returns the old value of *v minus 1, even if - * the atomic variable, v, was not decremented. - */ -static inline int atomic_dec_if_positive(atomic_t *v) -{ - int c, old, dec; - c = atomic_read(v); - for (;;) { - dec = c - 1; - if (unlikely(dec < 0)) - break; - old = atomic_cmpxchg((v), c, dec); - if (likely(old == c)) - break; - c = old; - } - return dec; -} - /** * atomic_inc_short - increment of a short integer * @v: pointer to type int diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h index 439a9acc132d..bdd35dbd0605 100644 --- a/arch/x86/include/asm/hugetlb.h +++ b/arch/x86/include/asm/hugetlb.h @@ -90,4 +90,8 @@ static inline void arch_release_hugepage(struct page *page) { } +static inline void arch_clear_hugepage_flags(struct page *page) +{ +} + #endif /* _ASM_X86_HUGETLB_H */ diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index fc9948465293..a1f780d45f76 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -146,8 +146,7 @@ static inline unsigned long pmd_pfn(pmd_t pmd) static inline int pmd_large(pmd_t pte) { - return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == - (_PAGE_PSE | _PAGE_PRESENT); + return pmd_flags(pte) & _PAGE_PSE; } #ifdef CONFIG_TRANSPARENT_HUGEPAGE @@ -415,7 +414,13 @@ static inline int pte_hidden(pte_t pte) static inline int pmd_present(pmd_t pmd) { - return pmd_flags(pmd) & _PAGE_PRESENT; + /* + * Checking for _PAGE_PSE is needed too because + * split_huge_page will temporarily clear the present bit (but + * the _PAGE_PSE flag will remain set at all times while the + * _PAGE_PRESENT bit is clear). + */ + return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); } static inline int pmd_none(pmd_t pmd) diff --git a/arch/x86/include/asm/pgtable_32.h b/arch/x86/include/asm/pgtable_32.h index 0c92113c4cb6..8faa215a503e 100644 --- a/arch/x86/include/asm/pgtable_32.h +++ b/arch/x86/include/asm/pgtable_32.h @@ -71,6 +71,7 @@ do { \ * tables contain all the necessary information. */ #define update_mmu_cache(vma, address, ptep) do { } while (0) +#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) #endif /* !__ASSEMBLY__ */ diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index 8251be02301e..47356f9df82e 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -143,6 +143,7 @@ static inline int pgd_large(pgd_t pgd) { return 0; } #define pte_unmap(pte) ((void)(pte))/* NOP */ #define update_mmu_cache(vma, address, ptep) do { } while (0) +#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) /* Encode and de-code a swap entry */ #if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index a530b230e7d7..8e13ecb41bee 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -1220,6 +1220,7 @@ good_area: /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk * of starvation. */ flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; goto retry; } } diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c index b91e48512425..937bff5cdaa7 100644 --- a/arch/x86/mm/hugetlbpage.c +++ b/arch/x86/mm/hugetlbpage.c @@ -71,7 +71,6 @@ huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud) struct address_space *mapping = vma->vm_file->f_mapping; pgoff_t idx = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; - struct prio_tree_iter iter; struct vm_area_struct *svma; unsigned long saddr; pte_t *spte = NULL; @@ -81,7 +80,7 @@ huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud) return (pte_t *)pmd_alloc(mm, pud, addr); mutex_lock(&mapping->i_mmap_mutex); - vma_prio_tree_foreach(svma, &iter, &mapping->i_mmap, idx, idx) { + vma_interval_tree_foreach(svma, &mapping->i_mmap, idx, idx) { if (svma == vma) continue; diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 3d68ef6d2266..0eb572eda406 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -664,20 +664,20 @@ static void free_pfn_range(u64 paddr, unsigned long size) } /* - * track_pfn_vma_copy is called when vma that is covering the pfnmap gets + * track_pfn_copy is called when vma that is covering the pfnmap gets * copied through copy_page_range(). * * If the vma has a linear pfn mapping for the entire range, we get the prot * from pte and reserve the entire vma range with single reserve_pfn_range call. */ -int track_pfn_vma_copy(struct vm_area_struct *vma) +int track_pfn_copy(struct vm_area_struct *vma) { resource_size_t paddr; unsigned long prot; unsigned long vma_size = vma->vm_end - vma->vm_start; pgprot_t pgprot; - if (is_linear_pfn_mapping(vma)) { + if (vma->vm_flags & VM_PAT) { /* * reserve the whole chunk covered by vma. We need the * starting address and protection from pte. @@ -694,31 +694,59 @@ int track_pfn_vma_copy(struct vm_area_struct *vma) } /* - * track_pfn_vma_new is called when a _new_ pfn mapping is being established - * for physical range indicated by pfn and size. - * * prot is passed in as a parameter for the new mapping. If the vma has a * linear pfn mapping for the entire range reserve the entire vma range with * single reserve_pfn_range call. */ -int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t *prot, - unsigned long pfn, unsigned long size) +int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot, + unsigned long pfn, unsigned long addr, unsigned long size) { + resource_size_t paddr = (resource_size_t)pfn << PAGE_SHIFT; unsigned long flags; - resource_size_t paddr; - unsigned long vma_size = vma->vm_end - vma->vm_start; - if (is_linear_pfn_mapping(vma)) { - /* reserve the whole chunk starting from vm_pgoff */ - paddr = (resource_size_t)vma->vm_pgoff << PAGE_SHIFT; - return reserve_pfn_range(paddr, vma_size, prot, 0); + /* reserve the whole chunk starting from paddr */ + if (addr == vma->vm_start && size == (vma->vm_end - vma->vm_start)) { + int ret; + + ret = reserve_pfn_range(paddr, size, prot, 0); + if (!ret) + vma->vm_flags |= VM_PAT; + return ret; } if (!pat_enabled) return 0; - /* for vm_insert_pfn and friends, we set prot based on lookup */ - flags = lookup_memtype(pfn << PAGE_SHIFT); + /* + * For anything smaller than the vma size we set prot based on the + * lookup. + */ + flags = lookup_memtype(paddr); + + /* Check memtype for the remaining pages */ + while (size > PAGE_SIZE) { + size -= PAGE_SIZE; + paddr += PAGE_SIZE; + if (flags != lookup_memtype(paddr)) + return -EINVAL; + } + + *prot = __pgprot((pgprot_val(vma->vm_page_prot) & (~_PAGE_CACHE_MASK)) | + flags); + + return 0; +} + +int track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot, + unsigned long pfn) +{ + unsigned long flags; + + if (!pat_enabled) + return 0; + + /* Set prot based on lookup */ + flags = lookup_memtype((resource_size_t)pfn << PAGE_SHIFT); *prot = __pgprot((pgprot_val(vma->vm_page_prot) & (~_PAGE_CACHE_MASK)) | flags); @@ -726,22 +754,31 @@ int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t *prot, } /* - * untrack_pfn_vma is called while unmapping a pfnmap for a region. + * untrack_pfn is called while unmapping a pfnmap for a region. * untrack can be called for a specific region indicated by pfn and size or - * can be for the entire vma (in which case size can be zero). + * can be for the entire vma (in which case pfn, size are zero). */ -void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn, - unsigned long size) +void untrack_pfn(struct vm_area_struct *vma, unsigned long pfn, + unsigned long size) { resource_size_t paddr; - unsigned long vma_size = vma->vm_end - vma->vm_start; + unsigned long prot; - if (is_linear_pfn_mapping(vma)) { - /* free the whole chunk starting from vm_pgoff */ - paddr = (resource_size_t)vma->vm_pgoff << PAGE_SHIFT; - free_pfn_range(paddr, vma_size); + if (!(vma->vm_flags & VM_PAT)) return; + + /* free the chunk starting from pfn or the whole chunk */ + paddr = (resource_size_t)pfn << PAGE_SHIFT; + if (!paddr && !size) { + if (follow_phys(vma, vma->vm_start, 0, &prot, &paddr)) { + WARN_ON_ONCE(1); + return; + } + + size = vma->vm_end - vma->vm_start; } + free_pfn_range(paddr, size); + vma->vm_flags &= ~VM_PAT; } pgprot_t pgprot_writecombine(pgprot_t prot) diff --git a/arch/x86/mm/pat_rbtree.c b/arch/x86/mm/pat_rbtree.c index 8acaddd0fb21..415f6c4ced36 100644 --- a/arch/x86/mm/pat_rbtree.c +++ b/arch/x86/mm/pat_rbtree.c @@ -12,7 +12,7 @@ #include <linux/debugfs.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/rbtree.h> +#include <linux/rbtree_augmented.h> #include <linux/sched.h> #include <linux/gfp.h> @@ -54,29 +54,24 @@ static u64 get_subtree_max_end(struct rb_node *node) return ret; } -/* Update 'subtree_max_end' for a node, based on node and its children */ -static void memtype_rb_augment_cb(struct rb_node *node, void *__unused) +static u64 compute_subtree_max_end(struct memtype *data) { - struct memtype *data; - u64 max_end, child_max_end; - - if (!node) - return; + u64 max_end = data->end, child_max_end; - data = container_of(node, struct memtype, rb); - max_end = data->end; - - child_max_end = get_subtree_max_end(node->rb_right); + child_max_end = get_subtree_max_end(data->rb.rb_right); if (child_max_end > max_end) max_end = child_max_end; - child_max_end = get_subtree_max_end(node->rb_left); + child_max_end = get_subtree_max_end(data->rb.rb_left); if (child_max_end > max_end) max_end = child_max_end; - data->subtree_max_end = max_end; + return max_end; } +RB_DECLARE_CALLBACKS(static, memtype_rb_augment_cb, struct memtype, rb, + u64, subtree_max_end, compute_subtree_max_end) + /* Find the first (lowest start addr) overlapping range from rb tree */ static struct memtype *memtype_rb_lowest_match(struct rb_root *root, u64 start, u64 end) @@ -179,15 +174,17 @@ static void memtype_rb_insert(struct rb_root *root, struct memtype *newdata) struct memtype *data = container_of(*node, struct memtype, rb); parent = *node; + if (data->subtree_max_end < newdata->end) + data->subtree_max_end = newdata->end; if (newdata->start <= data->start) node = &((*node)->rb_left); else if (newdata->start > data->start) node = &((*node)->rb_right); } + newdata->subtree_max_end = newdata->end; rb_link_node(&newdata->rb, parent, node); - rb_insert_color(&newdata->rb, root); - rb_augment_insert(&newdata->rb, memtype_rb_augment_cb, NULL); + rb_insert_augmented(&newdata->rb, root, &memtype_rb_augment_cb); } int rbt_memtype_check_insert(struct memtype *new, unsigned long *ret_type) @@ -209,16 +206,13 @@ int rbt_memtype_check_insert(struct memtype *new, unsigned long *ret_type) struct memtype *rbt_memtype_erase(u64 start, u64 end) { - struct rb_node *deepest; struct memtype *data; data = memtype_rb_exact_match(&memtype_rbroot, start, end); if (!data) goto out; - deepest = rb_augment_erase_begin(&data->rb); - rb_erase(&data->rb, &memtype_rbroot); - rb_augment_erase_end(deepest, memtype_rb_augment_cb, NULL); + rb_erase_augmented(&data->rb, &memtype_rbroot, &memtype_rb_augment_cb); out: return data; } diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 5a16824cc2b3..fd28d86fe3d2 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -2451,8 +2451,7 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma, prot = __pgprot(pgprot_val(prot) | _PAGE_IOMAP); - BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_RESERVED | VM_IO)) == - (VM_PFNMAP | VM_RESERVED | VM_IO))); + BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO))); rmd.mfn = mfn; rmd.prot = prot; diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c index 5a74c53bc69c..2c2f710ed1dc 100644 --- a/arch/xtensa/mm/fault.c +++ b/arch/xtensa/mm/fault.c @@ -126,6 +126,7 @@ good_area: current->min_flt++; if (fault & VM_FAULT_RETRY) { flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; /* No need to up_read(&mm->mmap_sem) as we would * have already released it in __lock_page_or_retry diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 7dda4f790f00..86c88216a503 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -248,26 +248,23 @@ static bool pages_correctly_reserved(unsigned long start_pfn, static int memory_block_action(unsigned long phys_index, unsigned long action) { - unsigned long start_pfn, start_paddr; + unsigned long start_pfn; unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block; struct page *first_page; int ret; first_page = pfn_to_page(phys_index << PFN_SECTION_SHIFT); + start_pfn = page_to_pfn(first_page); switch (action) { case MEM_ONLINE: - start_pfn = page_to_pfn(first_page); - if (!pages_correctly_reserved(start_pfn, nr_pages)) return -EBUSY; ret = online_pages(start_pfn, nr_pages); break; case MEM_OFFLINE: - start_paddr = page_to_pfn(first_page) << PAGE_SHIFT; - ret = remove_memory(start_paddr, - nr_pages << PAGE_SHIFT); + ret = offline_pages(start_pfn, nr_pages); break; default: WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: " @@ -278,13 +275,11 @@ memory_block_action(unsigned long phys_index, unsigned long action) return ret; } -static int memory_block_change_state(struct memory_block *mem, +static int __memory_block_change_state(struct memory_block *mem, unsigned long to_state, unsigned long from_state_req) { int ret = 0; - mutex_lock(&mem->state_mutex); - if (mem->state != from_state_req) { ret = -EINVAL; goto out; @@ -312,10 +307,20 @@ static int memory_block_change_state(struct memory_block *mem, break; } out: - mutex_unlock(&mem->state_mutex); return ret; } +static int memory_block_change_state(struct memory_block *mem, + unsigned long to_state, unsigned long from_state_req) +{ + int ret; + + mutex_lock(&mem->state_mutex); + ret = __memory_block_change_state(mem, to_state, from_state_req); + mutex_unlock(&mem->state_mutex); + + return ret; +} static ssize_t store_mem_state(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -656,6 +661,21 @@ int unregister_memory_section(struct mem_section *section) } /* + * offline one memory block. If the memory block has been offlined, do nothing. + */ +int offline_memory_block(struct memory_block *mem) +{ + int ret = 0; + + mutex_lock(&mem->state_mutex); + if (mem->state != MEM_OFFLINE) + ret = __memory_block_change_state(mem, MEM_OFFLINE, MEM_ONLINE); + mutex_unlock(&mem->state_mutex); + + return ret; +} + +/* * Initialize the sysfs support for memory devices... */ int __init memory_dev_init(void) diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c index 0c7d340b9ab9..f74e892711dd 100644 --- a/drivers/char/mbcs.c +++ b/drivers/char/mbcs.c @@ -507,7 +507,7 @@ static int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma) vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - /* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */ + /* Remap-pfn-range will mark the range VM_IO */ if (remap_pfn_range(vma, vma->vm_start, __pa(soft->gscr_addr) >> PAGE_SHIFT, diff --git a/drivers/char/mem.c b/drivers/char/mem.c index e5eedfa24c91..0537903c985b 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -322,7 +322,7 @@ static int mmap_mem(struct file *file, struct vm_area_struct *vma) vma->vm_ops = &mmap_mem_ops; - /* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */ + /* Remap-pfn-range will mark the range VM_IO */ if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c index 845f97fd1832..e1f60f968fdd 100644 --- a/drivers/char/mspec.c +++ b/drivers/char/mspec.c @@ -286,7 +286,7 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma, atomic_set(&vdata->refcnt, 1); vma->vm_private_data = vdata; - vma->vm_flags |= (VM_IO | VM_RESERVED | VM_PFNMAP | VM_DONTEXPAND); + vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP; if (vdata->type == MSPEC_FETCHOP || vdata->type == MSPEC_UNCACHED) vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); vma->vm_ops = &mspec_vm_ops; diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 92177d5aedee..24efae464e2c 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -706,7 +706,7 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) goto out_unlock; } - vma->vm_flags |= VM_RESERVED | VM_IO | VM_PFNMAP | VM_DONTEXPAND; + vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = obj->dev->driver->gem_vm_ops; vma->vm_private_data = map->handle; vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c index 23a824e6a22a..db7bd292410b 100644 --- a/drivers/gpu/drm/drm_vm.c +++ b/drivers/gpu/drm/drm_vm.c @@ -514,8 +514,7 @@ static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) vma->vm_ops = &drm_vm_dma_ops; - vma->vm_flags |= VM_RESERVED; /* Don't swap */ - vma->vm_flags |= VM_DONTEXPAND; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; drm_vm_open_locked(dev, vma); return 0; @@ -643,21 +642,16 @@ int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) case _DRM_SHM: vma->vm_ops = &drm_vm_shm_ops; vma->vm_private_data = (void *)map; - /* Don't let this area swap. Change when - DRM_KERNEL advisory is supported. */ - vma->vm_flags |= VM_RESERVED; break; case _DRM_SCATTER_GATHER: vma->vm_ops = &drm_vm_sg_ops; vma->vm_private_data = (void *)map; - vma->vm_flags |= VM_RESERVED; vma->vm_page_prot = drm_dma_prot(map->type, vma); break; default: return -EINVAL; /* This should never happen. */ } - vma->vm_flags |= VM_RESERVED; /* Don't swap */ - vma->vm_flags |= VM_DONTEXPAND; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; drm_vm_open_locked(dev, vma); return 0; diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index fcdbe46914f7..d2545560664f 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -500,7 +500,7 @@ static int exynos_drm_gem_mmap_buffer(struct file *filp, DRM_DEBUG_KMS("%s\n", __FILE__); - vma->vm_flags |= (VM_IO | VM_RESERVED); + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; update_vm_cache_attr(exynos_gem_obj, vma); diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c index 884ba73ac6ce..afded54dbb10 100644 --- a/drivers/gpu/drm/gma500/framebuffer.c +++ b/drivers/gpu/drm/gma500/framebuffer.c @@ -178,8 +178,7 @@ static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma) */ vma->vm_ops = &psbfb_vm_ops; vma->vm_private_data = (void *)psbfb; - vma->vm_flags |= VM_RESERVED | VM_IO | - VM_MIXEDMAP | VM_DONTEXPAND; + vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; return 0; } diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index a877813571a4..3ba72dbdc4bd 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -285,7 +285,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, */ vma->vm_private_data = bo; - vma->vm_flags |= VM_RESERVED | VM_IO | VM_MIXEDMAP | VM_DONTEXPAND; + vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; return 0; out_unref: ttm_bo_unref(&bo); @@ -300,7 +300,7 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo) vma->vm_ops = &ttm_bo_vm_ops; vma->vm_private_data = ttm_bo_reference(bo); - vma->vm_flags |= VM_RESERVED | VM_IO | VM_MIXEDMAP | VM_DONTEXPAND; + vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND; return 0; } EXPORT_SYMBOL(ttm_fbdev_mmap); diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c index 67df842fbb33..69a2b16f42a6 100644 --- a/drivers/gpu/drm/udl/udl_fb.c +++ b/drivers/gpu/drm/udl/udl_fb.c @@ -243,7 +243,7 @@ static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) size = 0; } - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ return 0; } diff --git a/drivers/infiniband/hw/ehca/ehca_uverbs.c b/drivers/infiniband/hw/ehca/ehca_uverbs.c index 45ee89b65c23..1a1d5d99fcf9 100644 --- a/drivers/infiniband/hw/ehca/ehca_uverbs.c +++ b/drivers/infiniband/hw/ehca/ehca_uverbs.c @@ -117,7 +117,7 @@ static int ehca_mmap_fw(struct vm_area_struct *vma, struct h_galpas *galpas, physical = galpas->user.fw_handle; vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); ehca_gen_dbg("vsize=%llx physical=%llx", vsize, physical); - /* VM_IO | VM_RESERVED are set by remap_pfn_range() */ + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ ret = remap_4k_pfn(vma, vma->vm_start, physical >> EHCA_PAGESHIFT, vma->vm_page_prot); if (unlikely(ret)) { @@ -139,7 +139,7 @@ static int ehca_mmap_queue(struct vm_area_struct *vma, struct ipz_queue *queue, u64 start, ofs; struct page *page; - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; start = vma->vm_start; for (ofs = 0; ofs < queue->queue_length; ofs += PAGE_SIZE) { u64 virt_addr = (u64)ipz_qeit_calc(queue, ofs); diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c index 736d9edbdbe7..3eb7e454849b 100644 --- a/drivers/infiniband/hw/ipath/ipath_file_ops.c +++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c @@ -1225,7 +1225,7 @@ static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; vma->vm_ops = &ipath_file_vm_ops; - vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; ret = 1; bail: diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c index faa44cb08071..959a5c4ff812 100644 --- a/drivers/infiniband/hw/qib/qib_file_ops.c +++ b/drivers/infiniband/hw/qib/qib_file_ops.c @@ -971,7 +971,7 @@ static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; vma->vm_ops = &qib_file_vm_ops; - vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; ret = 1; bail: diff --git a/drivers/media/pci/meye/meye.c b/drivers/media/pci/meye/meye.c index 7bc775219f97..e5a76da86081 100644 --- a/drivers/media/pci/meye/meye.c +++ b/drivers/media/pci/meye/meye.c @@ -1647,7 +1647,7 @@ static int meye_mmap(struct file *file, struct vm_area_struct *vma) vma->vm_ops = &meye_vm_ops; vma->vm_flags &= ~VM_IO; /* not I/O memory */ - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_private_data = (void *) (offset / gbufsize); meye_vm_open(vma); diff --git a/drivers/media/platform/omap/omap_vout.c b/drivers/media/platform/omap/omap_vout.c index 66ac21d466af..134016f0e660 100644 --- a/drivers/media/platform/omap/omap_vout.c +++ b/drivers/media/platform/omap/omap_vout.c @@ -911,7 +911,7 @@ static int omap_vout_mmap(struct file *file, struct vm_area_struct *vma) q->bufs[i]->baddr = vma->vm_start; - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); vma->vm_ops = &omap_vout_vm_ops; vma->vm_private_data = (void *) vout; diff --git a/drivers/media/platform/vino.c b/drivers/media/platform/vino.c index 790d96cffeea..70b0bf4b2900 100644 --- a/drivers/media/platform/vino.c +++ b/drivers/media/platform/vino.c @@ -3950,7 +3950,7 @@ found: fb->map_count = 1; - vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_flags &= ~VM_IO; vma->vm_private_data = fb; vma->vm_file = file; diff --git a/drivers/media/usb/sn9c102/sn9c102_core.c b/drivers/media/usb/sn9c102/sn9c102_core.c index 19ea780b16ff..5bfc8e2f018f 100644 --- a/drivers/media/usb/sn9c102/sn9c102_core.c +++ b/drivers/media/usb/sn9c102/sn9c102_core.c @@ -2126,8 +2126,7 @@ static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma) return -EINVAL; } - vma->vm_flags |= VM_IO; - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; pos = cam->frame[i].bufmem; while (size > 0) { /* size is page-aligned */ diff --git a/drivers/media/usb/usbvision/usbvision-video.c b/drivers/media/usb/usbvision/usbvision-video.c index f67018ed3795..5c36a57e6590 100644 --- a/drivers/media/usb/usbvision/usbvision-video.c +++ b/drivers/media/usb/usbvision/usbvision-video.c @@ -1108,8 +1108,7 @@ static int usbvision_mmap(struct file *file, struct vm_area_struct *vma) } /* VM_IO is eventually going to replace PageReserved altogether */ - vma->vm_flags |= VM_IO; - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; pos = usbvision->frame[i].data; while (size > 0) { diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c index f300deafd268..828e7c10bd70 100644 --- a/drivers/media/v4l2-core/videobuf-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf-dma-sg.c @@ -582,7 +582,7 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, map->count = 1; map->q = q; vma->vm_ops = &videobuf_vm_ops; - vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_flags &= ~VM_IO; /* using shared anonymous pages */ vma->vm_private_data = map; dprintk(1, "mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n", diff --git a/drivers/media/v4l2-core/videobuf-vmalloc.c b/drivers/media/v4l2-core/videobuf-vmalloc.c index df142580e44c..2ff7fcc77b11 100644 --- a/drivers/media/v4l2-core/videobuf-vmalloc.c +++ b/drivers/media/v4l2-core/videobuf-vmalloc.c @@ -270,7 +270,7 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q, } vma->vm_ops = &videobuf_vm_ops; - vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_private_data = map; dprintk(1, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", diff --git a/drivers/media/v4l2-core/videobuf2-memops.c b/drivers/media/v4l2-core/videobuf2-memops.c index 504cd4cbe29e..051ea3571b20 100644 --- a/drivers/media/v4l2-core/videobuf2-memops.c +++ b/drivers/media/v4l2-core/videobuf2-memops.c @@ -163,7 +163,7 @@ int vb2_mmap_pfn_range(struct vm_area_struct *vma, unsigned long paddr, return ret; } - vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_private_data = priv; vma->vm_ops = vm_ops; diff --git a/drivers/misc/carma/carma-fpga.c b/drivers/misc/carma/carma-fpga.c index 0c43297ed9ac..8835eabb3b87 100644 --- a/drivers/misc/carma/carma-fpga.c +++ b/drivers/misc/carma/carma-fpga.c @@ -1243,8 +1243,6 @@ static int data_mmap(struct file *filp, struct vm_area_struct *vma) return -EINVAL; } - /* IO memory (stop cacheing) */ - vma->vm_flags |= VM_IO | VM_RESERVED; vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); return io_remap_pfn_range(vma, vma->vm_start, addr, vsize, diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c index ecafa4ba238b..492c8cac69ac 100644 --- a/drivers/misc/sgi-gru/grufile.c +++ b/drivers/misc/sgi-gru/grufile.c @@ -108,9 +108,8 @@ static int gru_file_mmap(struct file *file, struct vm_area_struct *vma) vma->vm_end & (GRU_GSEG_PAGESIZE - 1)) return -EINVAL; - vma->vm_flags |= - (VM_IO | VM_DONTCOPY | VM_LOCKED | VM_DONTEXPAND | VM_PFNMAP | - VM_RESERVED); + vma->vm_flags |= VM_IO | VM_PFNMAP | VM_LOCKED | + VM_DONTCOPY | VM_DONTEXPAND | VM_DONTDUMP; vma->vm_page_prot = PAGE_SHARED; vma->vm_ops = &gru_vm_ops; diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index a6e74514e662..73ae81a629f2 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -1182,7 +1182,7 @@ static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) return -EINVAL; if (set_vm_offset(vma, off) < 0) return -EINVAL; - vma->vm_flags |= VM_IO | VM_RESERVED; + vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; #ifdef pgprot_noncached if (file->f_flags & O_DSYNC || off >= __pa(high_memory)) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 575730744fdb..b9adff543f5f 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -1056,8 +1056,7 @@ EXPORT_SYMBOL_GPL(mtd_writev); * until the request succeeds or until the allocation size falls below * the system page size. This attempts to make sure it does not adversely * impact system performance, so when allocating more than one page, we - * ask the memory allocator to avoid re-trying, swapping, writing back - * or performing I/O. + * ask the memory allocator to avoid re-trying. * * Note, this function also makes sure that the allocated buffer is aligned to * the MTD device's min. I/O unit, i.e. the "mtd->writesize" value. @@ -1071,8 +1070,7 @@ EXPORT_SYMBOL_GPL(mtd_writev); */ void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size) { - gfp_t flags = __GFP_NOWARN | __GFP_WAIT | - __GFP_NORETRY | __GFP_NO_KSWAPD; + gfp_t flags = __GFP_NOWARN | __GFP_WAIT | __GFP_NORETRY; size_t min_alloc = max_t(size_t, mtd->writesize, PAGE_SIZE); void *kbuf; diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c index f34b5b29fb95..d93b2b6b1f7a 100644 --- a/drivers/oprofile/buffer_sync.c +++ b/drivers/oprofile/buffer_sync.c @@ -216,7 +216,7 @@ static inline unsigned long fast_get_dcookie(struct path *path) } -/* Look up the dcookie for the task's first VM_EXECUTABLE mapping, +/* Look up the dcookie for the task's mm->exe_file, * which corresponds loosely to "application name". This is * not strictly necessary but allows oprofile to associate * shared-library samples with particular applications @@ -224,21 +224,10 @@ static inline unsigned long fast_get_dcookie(struct path *path) static unsigned long get_exec_dcookie(struct mm_struct *mm) { unsigned long cookie = NO_COOKIE; - struct vm_area_struct *vma; - - if (!mm) - goto out; - for (vma = mm->mmap; vma; vma = vma->vm_next) { - if (!vma->vm_file) - continue; - if (!(vma->vm_flags & VM_EXECUTABLE)) - continue; - cookie = fast_get_dcookie(&vma->vm_file->f_path); - break; - } + if (mm && mm->exe_file) + cookie = fast_get_dcookie(&mm->exe_file->f_path); -out: return cookie; } diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 9c5c5f2b3962..be2c9a6561ff 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1257,7 +1257,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma) } sfp->mmap_called = 1; - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_private_data = sfp; vma->vm_ops = &sg_mmap_vm_ops; return 0; diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c index 94a740d2883d..634b9ae713e0 100644 --- a/drivers/staging/android/ashmem.c +++ b/drivers/staging/android/ashmem.c @@ -332,7 +332,6 @@ static int ashmem_mmap(struct file *file, struct vm_area_struct *vma) if (vma->vm_file) fput(vma->vm_file); vma->vm_file = asma->file; - vma->vm_flags |= VM_CAN_NONLINEAR; out: mutex_unlock(&ashmem_mutex); diff --git a/drivers/staging/omapdrm/omap_gem_dmabuf.c b/drivers/staging/omapdrm/omap_gem_dmabuf.c index 42728e0cc194..c6f3ef6f57b9 100644 --- a/drivers/staging/omapdrm/omap_gem_dmabuf.c +++ b/drivers/staging/omapdrm/omap_gem_dmabuf.c @@ -160,7 +160,7 @@ static int omap_gem_dmabuf_mmap(struct dma_buf *buffer, goto out_unlock; } - vma->vm_flags |= VM_RESERVED | VM_IO | VM_PFNMAP | VM_DONTEXPAND; + vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = obj->dev->driver->gem_vm_ops; vma->vm_private_data = obj; vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); diff --git a/drivers/staging/tidspbridge/rmgr/drv_interface.c b/drivers/staging/tidspbridge/rmgr/drv_interface.c index bddea1d3b2c3..701a11ac676d 100644 --- a/drivers/staging/tidspbridge/rmgr/drv_interface.c +++ b/drivers/staging/tidspbridge/rmgr/drv_interface.c @@ -261,7 +261,7 @@ static int bridge_mmap(struct file *filp, struct vm_area_struct *vma) { u32 status; - vma->vm_flags |= VM_RESERVED | VM_IO; + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); dev_dbg(bridge, "%s: vm filp %p start %lx end %lx page_prot %ulx " diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index a783d533a1a6..5110f367f1f1 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -653,8 +653,6 @@ static int uio_mmap_physical(struct vm_area_struct *vma) if (mi < 0) return -EINVAL; - vma->vm_flags |= VM_IO | VM_RESERVED; - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); return remap_pfn_range(vma, @@ -666,7 +664,7 @@ static int uio_mmap_physical(struct vm_area_struct *vma) static int uio_mmap_logical(struct vm_area_struct *vma) { - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = &uio_vm_ops; uio_vma_open(vma); return 0; diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c index 91cd85076a44..9a62e89d6dc0 100644 --- a/drivers/usb/mon/mon_bin.c +++ b/drivers/usb/mon/mon_bin.c @@ -1247,7 +1247,7 @@ static int mon_bin_mmap(struct file *filp, struct vm_area_struct *vma) { /* don't do anything here: "fault" will set up page table entries */ vma->vm_ops = &mon_bin_vm_ops; - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_private_data = filp->private_data; mon_bin_vma_open(vma); return 0; diff --git a/drivers/video/68328fb.c b/drivers/video/68328fb.c index a425d65d5ba2..fa44fbed397d 100644 --- a/drivers/video/68328fb.c +++ b/drivers/video/68328fb.c @@ -400,7 +400,7 @@ static int mc68x328fb_mmap(struct fb_info *info, struct vm_area_struct *vma) #ifndef MMU /* this is uClinux (no MMU) specific code */ - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_start = videomemory; return 0; diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c index 3f2e8c13f1ca..868932f904ef 100644 --- a/drivers/video/aty/atyfb_base.c +++ b/drivers/video/aty/atyfb_base.c @@ -1942,8 +1942,7 @@ static int atyfb_mmap(struct fb_info *info, struct vm_area_struct *vma) off = vma->vm_pgoff << PAGE_SHIFT; size = vma->vm_end - vma->vm_start; - /* To stop the swapper from even considering these pages. */ - vma->vm_flags |= (VM_IO | VM_RESERVED); + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ if (((vma->vm_pgoff == 0) && (size == info->fix.smem_len)) || ((off == info->fix.smem_len) && (size == PAGE_SIZE))) diff --git a/drivers/video/fb-puv3.c b/drivers/video/fb-puv3.c index 60a787fa32cf..7d106f1f4906 100644 --- a/drivers/video/fb-puv3.c +++ b/drivers/video/fb-puv3.c @@ -653,9 +653,8 @@ int unifb_mmap(struct fb_info *info, vma->vm_page_prot)) return -EAGAIN; - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ return 0; - } static struct fb_ops unifb_ops = { diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c index 64cda560c488..88cad6b8b479 100644 --- a/drivers/video/fb_defio.c +++ b/drivers/video/fb_defio.c @@ -166,7 +166,7 @@ static const struct address_space_operations fb_deferred_io_aops = { static int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma) { vma->vm_ops = &fb_deferred_io_vm_ops; - vma->vm_flags |= ( VM_RESERVED | VM_DONTEXPAND ); + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; if (!(info->flags & FBINFO_VIRTFB)) vma->vm_flags |= VM_IO; vma->vm_private_data = info; diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 0dff12a1daef..3ff0105a496a 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1410,8 +1410,7 @@ fb_mmap(struct file *file, struct vm_area_struct * vma) return -EINVAL; off += start; vma->vm_pgoff = off >> PAGE_SHIFT; - /* This is an IO map - tell maydump to skip this VMA */ - vma->vm_flags |= VM_IO | VM_RESERVED; + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by io_remap_pfn_range()*/ vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); fb_pgprotect(file, vma, off); if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, diff --git a/drivers/video/gbefb.c b/drivers/video/gbefb.c index 7e7b7a9ba274..05e2a8a99d8f 100644 --- a/drivers/video/gbefb.c +++ b/drivers/video/gbefb.c @@ -1024,7 +1024,7 @@ static int gbefb_mmap(struct fb_info *info, pgprot_val(vma->vm_page_prot) = pgprot_fb(pgprot_val(vma->vm_page_prot)); - vma->vm_flags |= VM_IO | VM_RESERVED; + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ /* look for the starting tile */ tile = &gbe_tiles.cpu[offset >> TILE_SHIFT]; diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c index 3c39aa8de928..15373f4aee19 100644 --- a/drivers/video/omap2/omapfb/omapfb-main.c +++ b/drivers/video/omap2/omapfb/omapfb-main.c @@ -1128,7 +1128,7 @@ static int omapfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma) DBG("user mmap region start %lx, len %d, off %lx\n", start, len, off); vma->vm_pgoff = off >> PAGE_SHIFT; - vma->vm_flags |= VM_IO | VM_RESERVED; + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); vma->vm_ops = &mmap_user_ops; vma->vm_private_data = rg; diff --git a/drivers/video/sbuslib.c b/drivers/video/sbuslib.c index 3c1de981a18c..296afae442f4 100644 --- a/drivers/video/sbuslib.c +++ b/drivers/video/sbuslib.c @@ -57,9 +57,8 @@ int sbusfb_mmap_helper(struct sbus_mmap_map *map, off = vma->vm_pgoff << PAGE_SHIFT; - /* To stop the swapper from even considering these pages */ - vma->vm_flags |= (VM_IO | VM_RESERVED); - + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); /* Each page, see which map applies */ diff --git a/drivers/video/smscufx.c b/drivers/video/smscufx.c index 5533a32c6ca1..97bd6620c364 100644 --- a/drivers/video/smscufx.c +++ b/drivers/video/smscufx.c @@ -803,7 +803,6 @@ static int ufx_ops_mmap(struct fb_info *info, struct vm_area_struct *vma) size = 0; } - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ return 0; } diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c index 8af64148294b..f45eba3d6150 100644 --- a/drivers/video/udlfb.c +++ b/drivers/video/udlfb.c @@ -345,7 +345,6 @@ static int dlfb_ops_mmap(struct fb_info *info, struct vm_area_struct *vma) size = 0; } - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ return 0; } diff --git a/drivers/video/vermilion/vermilion.c b/drivers/video/vermilion/vermilion.c index 970e43d13f52..89aef343e295 100644 --- a/drivers/video/vermilion/vermilion.c +++ b/drivers/video/vermilion/vermilion.c @@ -1018,7 +1018,6 @@ static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma) offset += vinfo->vram_start; pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT; - vma->vm_flags |= VM_RESERVED | VM_IO; if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT, size, vma->vm_page_prot)) return -EAGAIN; diff --git a/drivers/video/vfb.c b/drivers/video/vfb.c index 501a922aa9dc..c7f692525b88 100644 --- a/drivers/video/vfb.c +++ b/drivers/video/vfb.c @@ -439,7 +439,6 @@ static int vfb_mmap(struct fb_info *info, size = 0; } - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ return 0; } diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index 934985d14c24..4097987b330e 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -535,7 +535,7 @@ static int gntalloc_mmap(struct file *filp, struct vm_area_struct *vma) vma->vm_private_data = vm_priv; - vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = &gntalloc_vmops; diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 5df9fd847b2e..610bfc6be177 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -720,7 +720,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) vma->vm_ops = &gntdev_vmops; - vma->vm_flags |= VM_RESERVED|VM_DONTEXPAND; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; if (use_ptemod) vma->vm_flags |= VM_DONTCOPY; diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index ef6389580b8c..8adb9cc267f9 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -455,7 +455,8 @@ static int privcmd_mmap(struct file *file, struct vm_area_struct *vma) { /* DONTCOPY is essential for Xen because copy_page_range doesn't know * how to recreate these mappings */ - vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY | VM_PFNMAP; + vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTCOPY | + VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = &privcmd_vm_ops; vma->vm_private_data = NULL; diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index dd6f7ee1e312..c2483e97beee 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -738,6 +738,7 @@ v9fs_cached_file_write(struct file *filp, const char __user * data, static const struct vm_operations_struct v9fs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = v9fs_vm_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 28a64e769527..e800dec958c3 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1123,7 +1123,7 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma, if (always_dump_vma(vma)) goto whole; - if (vma->vm_flags & VM_NODUMP) + if (vma->vm_flags & VM_DONTDUMP) return 0; /* Hugetlb memory check */ @@ -1135,7 +1135,7 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma, } /* Do not dump I/O mapped devices or special mappings */ - if (vma->vm_flags & (VM_IO | VM_RESERVED)) + if (vma->vm_flags & VM_IO) return 0; /* By default, dump shared memory if mapped from an anonymous file. */ diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 08d812b32282..262db114ff01 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -1205,7 +1205,7 @@ static int maydump(struct vm_area_struct *vma, unsigned long mm_flags) int dump_ok; /* Do not dump I/O mapped devices or special mappings */ - if (vma->vm_flags & (VM_IO | VM_RESERVED)) { + if (vma->vm_flags & VM_IO) { kdcore("%08lx: %08lx: no (IO)", vma->vm_start, vma->vm_flags); return 0; } diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 5caf285c6e4d..f6b40e86121b 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1599,6 +1599,7 @@ out: static const struct vm_operations_struct btrfs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = btrfs_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; static int btrfs_file_mmap(struct file *filp, struct vm_area_struct *vma) @@ -1610,7 +1611,6 @@ static int btrfs_file_mmap(struct file *filp, struct vm_area_struct *vma) file_accessed(filp); vma->vm_ops = &btrfs_file_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 22b6e4583faa..6690269f5dde 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1224,6 +1224,7 @@ out: static struct vm_operations_struct ceph_vmops = { .fault = filemap_fault, .page_mkwrite = ceph_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; int ceph_mmap(struct file *file, struct vm_area_struct *vma) @@ -1234,6 +1235,5 @@ int ceph_mmap(struct file *file, struct vm_area_struct *vma) return -ENOEXEC; file_accessed(file); vma->vm_ops = &ceph_vmops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 7d7bbdc4c8e7..edb25b4bbb95 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -3003,6 +3003,7 @@ cifs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) static struct vm_operations_struct cifs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = cifs_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma) diff --git a/fs/exec.c b/fs/exec.c index 19f4fb80cd17..4f2bebc276c5 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -603,7 +603,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, unsigned long shift) * process cleanup to remove whatever mess we made. */ if (length != move_page_tables(vma, old_start, - vma, new_start, length)) + vma, new_start, length, false)) return -ENOMEM; lru_add_drain(); diff --git a/fs/ext4/file.c b/fs/ext4/file.c index ca6f07afe601..bf3966bccd34 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -207,6 +207,7 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov, static const struct vm_operations_struct ext4_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = ext4_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) @@ -217,7 +218,6 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma) return -ENOEXEC; file_accessed(file); vma->vm_ops = &ext4_file_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 8e1d7b9e4a33..401b6c6248ae 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -439,8 +439,7 @@ static void requeue_inode(struct inode *inode, struct bdi_writeback *wb, * setting I_SYNC flag and calling inode_sync_complete() to clear it. */ static int -__writeback_single_inode(struct inode *inode, struct bdi_writeback *wb, - struct writeback_control *wbc) +__writeback_single_inode(struct inode *inode, struct writeback_control *wbc) { struct address_space *mapping = inode->i_mapping; long nr_to_write = wbc->nr_to_write; @@ -527,7 +526,7 @@ writeback_single_inode(struct inode *inode, struct bdi_writeback *wb, inode->i_state |= I_SYNC; spin_unlock(&inode->i_lock); - ret = __writeback_single_inode(inode, wb, wbc); + ret = __writeback_single_inode(inode, wbc); spin_lock(&wb->list_lock); spin_lock(&inode->i_lock); @@ -670,7 +669,7 @@ static long writeback_sb_inodes(struct super_block *sb, * We use I_SYNC to pin the inode in memory. While it is set * evict_inode() will wait so the inode cannot be freed. */ - __writeback_single_inode(inode, wb, &wbc); + __writeback_single_inode(inode, &wbc); work->nr_pages -= write_chunk - wbc.nr_to_write; wrote += write_chunk - wbc.nr_to_write; diff --git a/fs/fuse/file.c b/fs/fuse/file.c index aba15f1b7ad2..78d2837bc940 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1379,6 +1379,7 @@ static const struct vm_operations_struct fuse_file_vm_ops = { .close = fuse_vma_close, .fault = filemap_fault, .page_mkwrite = fuse_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma) diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 30e21997a1a1..0def0504afc1 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -492,6 +492,7 @@ out: static const struct vm_operations_struct gfs2_vm_ops = { .fault = filemap_fault, .page_mkwrite = gfs2_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; /** @@ -526,7 +527,6 @@ static int gfs2_mmap(struct file *file, struct vm_area_struct *vma) return error; } vma->vm_ops = &gfs2_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 9460120a5170..c5bc355d8243 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -110,7 +110,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) * way when do_mmap_pgoff unwinds (may be important on powerpc * and ia64). */ - vma->vm_flags |= VM_HUGETLB | VM_RESERVED; + vma->vm_flags |= VM_HUGETLB | VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = &hugetlb_vm_ops; if (vma->vm_pgoff & (~huge_page_mask(h) >> PAGE_SHIFT)) @@ -397,17 +397,16 @@ static void hugetlbfs_evict_inode(struct inode *inode) } static inline void -hugetlb_vmtruncate_list(struct prio_tree_root *root, pgoff_t pgoff) +hugetlb_vmtruncate_list(struct rb_root *root, pgoff_t pgoff) { struct vm_area_struct *vma; - struct prio_tree_iter iter; - vma_prio_tree_foreach(vma, &iter, root, pgoff, ULONG_MAX) { + vma_interval_tree_foreach(vma, root, pgoff, ULONG_MAX) { unsigned long v_offset; /* * Can the expression below overflow on 32-bit arches? - * No, because the prio_tree returns us only those vmas + * No, because the interval tree returns us only those vmas * which overlap the truncated area starting at pgoff, * and no vma on a 32-bit arch can span beyond the 4GB. */ @@ -432,7 +431,7 @@ static int hugetlb_vmtruncate(struct inode *inode, loff_t offset) i_size_write(inode, offset); mutex_lock(&mapping->i_mmap_mutex); - if (!prio_tree_empty(&mapping->i_mmap)) + if (!RB_EMPTY_ROOT(&mapping->i_mmap)) hugetlb_vmtruncate_list(&mapping->i_mmap, pgoff); mutex_unlock(&mapping->i_mmap_mutex); truncate_hugepages(inode, offset); diff --git a/fs/inode.c b/fs/inode.c index ac8d904b3f16..b03c71957246 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -348,7 +348,7 @@ void address_space_init_once(struct address_space *mapping) mutex_init(&mapping->i_mmap_mutex); INIT_LIST_HEAD(&mapping->private_list); spin_lock_init(&mapping->private_lock); - INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap); + mapping->i_mmap = RB_ROOT; INIT_LIST_HEAD(&mapping->i_mmap_nonlinear); } EXPORT_SYMBOL(address_space_init_once); diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index 1ea349fff68b..ae81b01e6fd7 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -394,8 +394,11 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c, } /* Trivial function to remove the last node in the tree. Which by definition - has no right-hand -- so can be removed just by making its only child (if - any) take its place under its parent. */ + has no right-hand child — so can be removed just by making its left-hand + child (if any) take its place under its parent. Since this is only done + when we're consuming the whole tree, there's no need to use rb_erase() + and let it worry about adjusting colours and balancing the tree. That + would just be a waste of time. */ static void eat_last(struct rb_root *root, struct rb_node *node) { struct rb_node *parent = rb_parent(node); @@ -412,12 +415,12 @@ static void eat_last(struct rb_root *root, struct rb_node *node) link = &parent->rb_right; *link = node->rb_left; - /* Colour doesn't matter now. Only the parent pointer. */ if (node->rb_left) - node->rb_left->rb_parent_color = node->rb_parent_color; + node->rb_left->__rb_parent_color = node->__rb_parent_color; } -/* We put this in reverse order, so we can just use eat_last */ +/* We put the version tree in reverse order, so we can use the same eat_last() + function that we use to consume the tmpnode tree (tn_root). */ static void ver_insert(struct rb_root *ver_root, struct jffs2_tmp_dnode_info *tn) { struct rb_node **link = &ver_root->rb_node; diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 6a7fcab7ecb3..f692be97676d 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -578,6 +578,7 @@ out: static const struct vm_operations_struct nfs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = nfs_vm_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; static int nfs_need_sync_write(struct file *filp, struct inode *inode) diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index 5b387a4c293e..16f35f7423c5 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -135,13 +135,13 @@ static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) static const struct vm_operations_struct nilfs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = nilfs_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; static int nilfs_file_mmap(struct file *file, struct vm_area_struct *vma) { file_accessed(file); vma->vm_ops = &nilfs_file_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c index d150372fd81d..47a87dda54ce 100644 --- a/fs/ocfs2/mmap.c +++ b/fs/ocfs2/mmap.c @@ -173,6 +173,7 @@ out: static const struct vm_operations_struct ocfs2_file_vm_ops = { .fault = ocfs2_fault, .page_mkwrite = ocfs2_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; int ocfs2_mmap(struct file *file, struct vm_area_struct *vma) @@ -188,7 +189,6 @@ int ocfs2_mmap(struct file *file, struct vm_area_struct *vma) ocfs2_inode_unlock(file->f_dentry->d_inode, lock_level); out: vma->vm_ops = &ocfs2_file_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/fs/proc/base.c b/fs/proc/base.c index d295af993677..ef5c84be66f9 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -873,111 +873,6 @@ static const struct file_operations proc_environ_operations = { .release = mem_release, }; -static ssize_t oom_adjust_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode); - char buffer[PROC_NUMBUF]; - size_t len; - int oom_adjust = OOM_DISABLE; - unsigned long flags; - - if (!task) - return -ESRCH; - - if (lock_task_sighand(task, &flags)) { - oom_adjust = task->signal->oom_adj; - unlock_task_sighand(task, &flags); - } - - put_task_struct(task); - - len = snprintf(buffer, sizeof(buffer), "%i\n", oom_adjust); - - return simple_read_from_buffer(buf, count, ppos, buffer, len); -} - -static ssize_t oom_adjust_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) -{ - struct task_struct *task; - char buffer[PROC_NUMBUF]; - int oom_adjust; - unsigned long flags; - int err; - - memset(buffer, 0, sizeof(buffer)); - if (count > sizeof(buffer) - 1) - count = sizeof(buffer) - 1; - if (copy_from_user(buffer, buf, count)) { - err = -EFAULT; - goto out; - } - - err = kstrtoint(strstrip(buffer), 0, &oom_adjust); - if (err) - goto out; - if ((oom_adjust < OOM_ADJUST_MIN || oom_adjust > OOM_ADJUST_MAX) && - oom_adjust != OOM_DISABLE) { - err = -EINVAL; - goto out; - } - - task = get_proc_task(file->f_path.dentry->d_inode); - if (!task) { - err = -ESRCH; - goto out; - } - - task_lock(task); - if (!task->mm) { - err = -EINVAL; - goto err_task_lock; - } - - if (!lock_task_sighand(task, &flags)) { - err = -ESRCH; - goto err_task_lock; - } - - if (oom_adjust < task->signal->oom_adj && !capable(CAP_SYS_RESOURCE)) { - err = -EACCES; - goto err_sighand; - } - - /* - * Warn that /proc/pid/oom_adj is deprecated, see - * Documentation/feature-removal-schedule.txt. - */ - printk_once(KERN_WARNING "%s (%d): /proc/%d/oom_adj is deprecated, please use /proc/%d/oom_score_adj instead.\n", - current->comm, task_pid_nr(current), task_pid_nr(task), - task_pid_nr(task)); - task->signal->oom_adj = oom_adjust; - /* - * Scale /proc/pid/oom_score_adj appropriately ensuring that a maximum - * value is always attainable. - */ - if (task->signal->oom_adj == OOM_ADJUST_MAX) - task->signal->oom_score_adj = OOM_SCORE_ADJ_MAX; - else - task->signal->oom_score_adj = (oom_adjust * OOM_SCORE_ADJ_MAX) / - -OOM_DISABLE; - trace_oom_score_adj_update(task); -err_sighand: - unlock_task_sighand(task, &flags); -err_task_lock: - task_unlock(task); - put_task_struct(task); -out: - return err < 0 ? err : count; -} - -static const struct file_operations proc_oom_adjust_operations = { - .read = oom_adjust_read, - .write = oom_adjust_write, - .llseek = generic_file_llseek, -}; - static ssize_t oom_score_adj_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { @@ -1051,15 +946,7 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf, if (has_capability_noaudit(current, CAP_SYS_RESOURCE)) task->signal->oom_score_adj_min = oom_score_adj; trace_oom_score_adj_update(task); - /* - * Scale /proc/pid/oom_adj appropriately ensuring that OOM_DISABLE is - * always attainable. - */ - if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) - task->signal->oom_adj = OOM_DISABLE; - else - task->signal->oom_adj = (oom_score_adj * OOM_ADJUST_MAX) / - OOM_SCORE_ADJ_MAX; + err_sighand: unlock_task_sighand(task, &flags); err_task_lock: @@ -2710,7 +2597,6 @@ static const struct pid_entry tgid_base_stuff[] = { REG("cgroup", S_IRUGO, proc_cgroup_operations), #endif INF("oom_score", S_IRUGO, proc_oom_score), - REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adjust_operations), REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations), #ifdef CONFIG_AUDITSYSCALL REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations), @@ -3077,7 +2963,6 @@ static const struct pid_entry tid_base_stuff[] = { REG("cgroup", S_IRUGO, proc_cgroup_operations), #endif INF("oom_score", S_IRUGO, proc_oom_score), - REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adjust_operations), REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations), #ifdef CONFIG_AUDITSYSCALL REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations), diff --git a/fs/proc/page.c b/fs/proc/page.c index 7fcd0d60a968..b8730d9ebaee 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -115,7 +115,13 @@ u64 stable_page_flags(struct page *page) u |= 1 << KPF_COMPOUND_TAIL; if (PageHuge(page)) u |= 1 << KPF_HUGE; - else if (PageTransCompound(page)) + /* + * PageTransCompound can be true for non-huge compound pages (slab + * pages or pages allocated by drivers with __GFP_COMP) because it + * just checks PG_head/PG_tail, so we need to check PageLRU to make + * sure a given page is a thp, not a non-huge compound page. + */ + else if (PageTransCompound(page) && PageLRU(compound_trans_head(page))) u |= 1 << KPF_THP; /* diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index dcd56f84db7e..a781bdf06694 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -142,6 +142,7 @@ static int insert_entry(struct ctl_table_header *head, struct ctl_table *entry) } rb_link_node(node, parent, p); + rb_insert_color(node, &head->parent->root); return 0; } @@ -168,10 +169,8 @@ static void init_header(struct ctl_table_header *head, head->node = node; if (node) { struct ctl_table *entry; - for (entry = table; entry->procname; entry++, node++) { - rb_init_node(&node->node); + for (entry = table; entry->procname; entry++, node++) node->header = head; - } } } diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 4540b8f76f16..79827ce03e3b 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -54,7 +54,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm) "VmPTE:\t%8lu kB\n" "VmSwap:\t%8lu kB\n", hiwater_vm << (PAGE_SHIFT-10), - (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10), + total_vm << (PAGE_SHIFT-10), mm->locked_vm << (PAGE_SHIFT-10), mm->pinned_vm << (PAGE_SHIFT-10), hiwater_rss << (PAGE_SHIFT-10), diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index ff48c5a85309..5bc77817f382 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -1536,6 +1536,7 @@ out_unlock: static const struct vm_operations_struct ubifs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = ubifs_vm_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 1eaeb8be3aae..aa473fa640a2 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -940,7 +940,6 @@ xfs_file_mmap( struct vm_area_struct *vma) { vma->vm_ops = &xfs_file_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; file_accessed(filp); return 0; @@ -1443,4 +1442,5 @@ const struct file_operations xfs_dir_file_operations = { static const struct vm_operations_struct xfs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = xfs_vm_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index ff4947b7a976..b36ce40bd1c6 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -87,7 +87,7 @@ static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, pmd_t *pmdp) { pmd_t pmd = *pmdp; - pmd_clear(mm, address, pmdp); + pmd_clear(pmdp); return pmd; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ @@ -162,6 +162,19 @@ extern void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp); #endif +#ifndef __HAVE_ARCH_PGTABLE_DEPOSIT +extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable); +#endif + +#ifndef __HAVE_ARCH_PGTABLE_WITHDRAW +extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm); +#endif + +#ifndef __HAVE_ARCH_PMDP_INVALIDATE +extern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, + pmd_t *pmdp); +#endif + #ifndef __HAVE_ARCH_PTE_SAME static inline int pte_same(pte_t pte_a, pte_t pte_b) { @@ -381,48 +394,59 @@ static inline void ptep_modify_prot_commit(struct mm_struct *mm, #ifndef __HAVE_PFNMAP_TRACKING /* - * Interface that can be used by architecture code to keep track of - * memory type of pfn mappings (remap_pfn_range, vm_insert_pfn) - * - * track_pfn_vma_new is called when a _new_ pfn mapping is being established - * for physical range indicated by pfn and size. + * Interfaces that can be used by architecture code to keep track of + * memory type of pfn mappings specified by the remap_pfn_range, + * vm_insert_pfn. + */ + +/* + * track_pfn_remap is called when a _new_ pfn mapping is being established + * by remap_pfn_range() for physical range indicated by pfn and size. */ -static inline int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t *prot, - unsigned long pfn, unsigned long size) +static inline int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot, + unsigned long pfn, unsigned long addr, + unsigned long size) { return 0; } /* - * Interface that can be used by architecture code to keep track of - * memory type of pfn mappings (remap_pfn_range, vm_insert_pfn) - * - * track_pfn_vma_copy is called when vma that is covering the pfnmap gets + * track_pfn_insert is called when a _new_ single pfn is established + * by vm_insert_pfn(). + */ +static inline int track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot, + unsigned long pfn) +{ + return 0; +} + +/* + * track_pfn_copy is called when vma that is covering the pfnmap gets * copied through copy_page_range(). */ -static inline int track_pfn_vma_copy(struct vm_area_struct *vma) +static inline int track_pfn_copy(struct vm_area_struct *vma) { return 0; } /* - * Interface that can be used by architecture code to keep track of - * memory type of pfn mappings (remap_pfn_range, vm_insert_pfn) - * * untrack_pfn_vma is called while unmapping a pfnmap for a region. * untrack can be called for a specific region indicated by pfn and size or - * can be for the entire vma (in which case size can be zero). + * can be for the entire vma (in which case pfn, size are zero). */ -static inline void untrack_pfn_vma(struct vm_area_struct *vma, - unsigned long pfn, unsigned long size) +static inline void untrack_pfn(struct vm_area_struct *vma, + unsigned long pfn, unsigned long size) { } #else -extern int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t *prot, - unsigned long pfn, unsigned long size); -extern int track_pfn_vma_copy(struct vm_area_struct *vma); -extern void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn, - unsigned long size); +extern int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot, + unsigned long pfn, unsigned long addr, + unsigned long size); +extern int track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot, + unsigned long pfn); +extern int track_pfn_copy(struct vm_area_struct *vma); +extern void untrack_pfn(struct vm_area_struct *vma, unsigned long pfn, + unsigned long size); #endif #ifdef CONFIG_MMU diff --git a/include/linux/atomic.h b/include/linux/atomic.h index 70cfcb2d63c4..5b08a8540ecf 100644 --- a/include/linux/atomic.h +++ b/include/linux/atomic.h @@ -86,6 +86,31 @@ static inline int atomic_dec_unless_positive(atomic_t *p) } #endif +/* + * atomic_dec_if_positive - decrement by 1 if old value positive + * @v: pointer of type atomic_t + * + * The function returns the old value of *v minus 1, even if + * the atomic variable, v, was not decremented. + */ +#ifndef atomic_dec_if_positive +static inline int atomic_dec_if_positive(atomic_t *v) +{ + int c, old, dec; + c = atomic_read(v); + for (;;) { + dec = c - 1; + if (unlikely(dec < 0)) + break; + old = atomic_cmpxchg((v), c, dec); + if (likely(old == c)) + break; + c = old; + } + return dec; +} +#endif + #ifndef CONFIG_ARCH_HAS_ATOMIC_OR static inline void atomic_or(int i, atomic_t *v) { diff --git a/include/linux/compaction.h b/include/linux/compaction.h index ef658147e4e8..6ecb6dc2f303 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -22,8 +22,9 @@ extern int sysctl_extfrag_handler(struct ctl_table *table, int write, extern int fragmentation_index(struct zone *zone, unsigned int order); extern unsigned long try_to_compact_pages(struct zonelist *zonelist, int order, gfp_t gfp_mask, nodemask_t *mask, - bool sync, bool *contended); + bool sync, bool *contended, struct page **page); extern int compact_pgdat(pg_data_t *pgdat, int order); +extern void reset_isolation_suitable(pg_data_t *pgdat); extern unsigned long compaction_suitable(struct zone *zone, int order); /* Do not skip compaction more than 64 times */ @@ -61,10 +62,20 @@ static inline bool compaction_deferred(struct zone *zone, int order) return zone->compact_considered < defer_limit; } +/* Returns true if restarting compaction after many failures */ +static inline bool compaction_restarting(struct zone *zone, int order) +{ + if (order < zone->compact_order_failed) + return false; + + return zone->compact_defer_shift == COMPACT_MAX_DEFER_SHIFT && + zone->compact_considered >= 1UL << zone->compact_defer_shift; +} + #else static inline unsigned long try_to_compact_pages(struct zonelist *zonelist, int order, gfp_t gfp_mask, nodemask_t *nodemask, - bool sync, bool *contended) + bool sync, bool *contended, struct page **page) { return COMPACT_CONTINUE; } @@ -74,6 +85,10 @@ static inline int compact_pgdat(pg_data_t *pgdat, int order) return COMPACT_CONTINUE; } +static inline void reset_isolation_suitable(pg_data_t *pgdat) +{ +} + static inline unsigned long compaction_suitable(struct zone *zone, int order) { return COMPACT_SKIPPED; diff --git a/include/linux/fs.h b/include/linux/fs.h index ca6d8c806f47..c617ed024df8 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -401,7 +401,7 @@ struct inodes_stat_t { #include <linux/cache.h> #include <linux/list.h> #include <linux/radix-tree.h> -#include <linux/prio_tree.h> +#include <linux/rbtree.h> #include <linux/init.h> #include <linux/pid.h> #include <linux/bug.h> @@ -669,7 +669,7 @@ struct address_space { struct radix_tree_root page_tree; /* radix tree of all pages */ spinlock_t tree_lock; /* and lock protecting it */ unsigned int i_mmap_writable;/* count VM_SHARED mappings */ - struct prio_tree_root i_mmap; /* tree of private and shared mappings */ + struct rb_root i_mmap; /* tree of private and shared mappings */ struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */ struct mutex i_mmap_mutex; /* protect tree, count, list */ /* Protected by tree_lock together with the radix tree */ @@ -741,7 +741,7 @@ int mapping_tagged(struct address_space *mapping, int tag); */ static inline int mapping_mapped(struct address_space *mapping) { - return !prio_tree_empty(&mapping->i_mmap) || + return !RB_EMPTY_ROOT(&mapping->i_mmap) || !list_empty(&mapping->i_mmap_nonlinear); } @@ -2552,6 +2552,8 @@ extern int sb_min_blocksize(struct super_block *, int); extern int generic_file_mmap(struct file *, struct vm_area_struct *); extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *); +extern int generic_file_remap_pages(struct vm_area_struct *, unsigned long addr, + unsigned long size, pgoff_t pgoff); extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size); int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk); extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t); diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 4883f393f50a..02c1c9710be0 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -30,12 +30,7 @@ struct vm_area_struct; #define ___GFP_HARDWALL 0x20000u #define ___GFP_THISNODE 0x40000u #define ___GFP_RECLAIMABLE 0x80000u -#ifdef CONFIG_KMEMCHECK #define ___GFP_NOTRACK 0x200000u -#else -#define ___GFP_NOTRACK 0 -#endif -#define ___GFP_NO_KSWAPD 0x400000u #define ___GFP_OTHER_NODE 0x800000u #define ___GFP_WRITE 0x1000000u @@ -90,7 +85,6 @@ struct vm_area_struct; #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE) /* Page is reclaimable */ #define __GFP_NOTRACK ((__force gfp_t)___GFP_NOTRACK) /* Don't track with kmemcheck */ -#define __GFP_NO_KSWAPD ((__force gfp_t)___GFP_NO_KSWAPD) #define __GFP_OTHER_NODE ((__force gfp_t)___GFP_OTHER_NODE) /* On behalf of other node */ #define __GFP_WRITE ((__force gfp_t)___GFP_WRITE) /* Allocator intends to dirty page */ @@ -120,8 +114,7 @@ struct vm_area_struct; __GFP_MOVABLE) #define GFP_IOFS (__GFP_IO | __GFP_FS) #define GFP_TRANSHUGE (GFP_HIGHUSER_MOVABLE | __GFP_COMP | \ - __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN | \ - __GFP_NO_KSWAPD) + __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN) #ifdef CONFIG_NUMA #define GFP_THISNODE (__GFP_THISNODE | __GFP_NOWARN | __GFP_NORETRY) diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 4c59b1131187..b31cb7da0346 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -11,8 +11,7 @@ extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, extern int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pmd_t *pmd, pmd_t orig_pmd); -extern pgtable_t get_pmd_huge_pte(struct mm_struct *mm); -extern struct page *follow_trans_huge_pmd(struct mm_struct *mm, +extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, unsigned int flags); diff --git a/include/linux/interval_tree.h b/include/linux/interval_tree.h new file mode 100644 index 000000000000..724556aa3c95 --- /dev/null +++ b/include/linux/interval_tree.h @@ -0,0 +1,27 @@ +#ifndef _LINUX_INTERVAL_TREE_H +#define _LINUX_INTERVAL_TREE_H + +#include <linux/rbtree.h> + +struct interval_tree_node { + struct rb_node rb; + unsigned long start; /* Start of interval */ + unsigned long last; /* Last location _in_ interval */ + unsigned long __subtree_last; +}; + +extern void +interval_tree_insert(struct interval_tree_node *node, struct rb_root *root); + +extern void +interval_tree_remove(struct interval_tree_node *node, struct rb_root *root); + +extern struct interval_tree_node * +interval_tree_iter_first(struct rb_root *root, + unsigned long start, unsigned long last); + +extern struct interval_tree_node * +interval_tree_iter_next(struct interval_tree_node *node, + unsigned long start, unsigned long last); + +#endif /* _LINUX_INTERVAL_TREE_H */ diff --git a/include/linux/interval_tree_generic.h b/include/linux/interval_tree_generic.h new file mode 100644 index 000000000000..58370e1862ad --- /dev/null +++ b/include/linux/interval_tree_generic.h @@ -0,0 +1,191 @@ +/* + Interval Trees + (C) 2012 Michel Lespinasse <walken@google.com> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + include/linux/interval_tree_generic.h +*/ + +#include <linux/rbtree_augmented.h> + +/* + * Template for implementing interval trees + * + * ITSTRUCT: struct type of the interval tree nodes + * ITRB: name of struct rb_node field within ITSTRUCT + * ITTYPE: type of the interval endpoints + * ITSUBTREE: name of ITTYPE field within ITSTRUCT holding last-in-subtree + * ITSTART(n): start endpoint of ITSTRUCT node n + * ITLAST(n): last endpoint of ITSTRUCT node n + * ITSTATIC: 'static' or empty + * ITPREFIX: prefix to use for the inline tree definitions + * + * Note - before using this, please consider if non-generic version + * (interval_tree.h) would work for you... + */ + +#define INTERVAL_TREE_DEFINE(ITSTRUCT, ITRB, ITTYPE, ITSUBTREE, \ + ITSTART, ITLAST, ITSTATIC, ITPREFIX) \ + \ +/* Callbacks for augmented rbtree insert and remove */ \ + \ +static inline ITTYPE ITPREFIX ## _compute_subtree_last(ITSTRUCT *node) \ +{ \ + ITTYPE max = ITLAST(node), subtree_last; \ + if (node->ITRB.rb_left) { \ + subtree_last = rb_entry(node->ITRB.rb_left, \ + ITSTRUCT, ITRB)->ITSUBTREE; \ + if (max < subtree_last) \ + max = subtree_last; \ + } \ + if (node->ITRB.rb_right) { \ + subtree_last = rb_entry(node->ITRB.rb_right, \ + ITSTRUCT, ITRB)->ITSUBTREE; \ + if (max < subtree_last) \ + max = subtree_last; \ + } \ + return max; \ +} \ + \ +RB_DECLARE_CALLBACKS(static, ITPREFIX ## _augment, ITSTRUCT, ITRB, \ + ITTYPE, ITSUBTREE, ITPREFIX ## _compute_subtree_last) \ + \ +/* Insert / remove interval nodes from the tree */ \ + \ +ITSTATIC void ITPREFIX ## _insert(ITSTRUCT *node, struct rb_root *root) \ +{ \ + struct rb_node **link = &root->rb_node, *rb_parent = NULL; \ + ITTYPE start = ITSTART(node), last = ITLAST(node); \ + ITSTRUCT *parent; \ + \ + while (*link) { \ + rb_parent = *link; \ + parent = rb_entry(rb_parent, ITSTRUCT, ITRB); \ + if (parent->ITSUBTREE < last) \ + parent->ITSUBTREE = last; \ + if (start < ITSTART(parent)) \ + link = &parent->ITRB.rb_left; \ + else \ + link = &parent->ITRB.rb_right; \ + } \ + \ + node->ITSUBTREE = last; \ + rb_link_node(&node->ITRB, rb_parent, link); \ + rb_insert_augmented(&node->ITRB, root, &ITPREFIX ## _augment); \ +} \ + \ +ITSTATIC void ITPREFIX ## _remove(ITSTRUCT *node, struct rb_root *root) \ +{ \ + rb_erase_augmented(&node->ITRB, root, &ITPREFIX ## _augment); \ +} \ + \ +/* \ + * Iterate over intervals intersecting [start;last] \ + * \ + * Note that a node's interval intersects [start;last] iff: \ + * Cond1: ITSTART(node) <= last \ + * and \ + * Cond2: start <= ITLAST(node) \ + */ \ + \ +static ITSTRUCT * \ +ITPREFIX ## _subtree_search(ITSTRUCT *node, ITTYPE start, ITTYPE last) \ +{ \ + while (true) { \ + /* \ + * Loop invariant: start <= node->ITSUBTREE \ + * (Cond2 is satisfied by one of the subtree nodes) \ + */ \ + if (node->ITRB.rb_left) { \ + ITSTRUCT *left = rb_entry(node->ITRB.rb_left, \ + ITSTRUCT, ITRB); \ + if (start <= left->ITSUBTREE) { \ + /* \ + * Some nodes in left subtree satisfy Cond2. \ + * Iterate to find the leftmost such node N. \ + * If it also satisfies Cond1, that's the \ + * match we are looking for. Otherwise, there \ + * is no matching interval as nodes to the \ + * right of N can't satisfy Cond1 either. \ + */ \ + node = left; \ + continue; \ + } \ + } \ + if (ITSTART(node) <= last) { /* Cond1 */ \ + if (start <= ITLAST(node)) /* Cond2 */ \ + return node; /* node is leftmost match */ \ + if (node->ITRB.rb_right) { \ + node = rb_entry(node->ITRB.rb_right, \ + ITSTRUCT, ITRB); \ + if (start <= node->ITSUBTREE) \ + continue; \ + } \ + } \ + return NULL; /* No match */ \ + } \ +} \ + \ +ITSTATIC ITSTRUCT * \ +ITPREFIX ## _iter_first(struct rb_root *root, ITTYPE start, ITTYPE last) \ +{ \ + ITSTRUCT *node; \ + \ + if (!root->rb_node) \ + return NULL; \ + node = rb_entry(root->rb_node, ITSTRUCT, ITRB); \ + if (node->ITSUBTREE < start) \ + return NULL; \ + return ITPREFIX ## _subtree_search(node, start, last); \ +} \ + \ +ITSTATIC ITSTRUCT * \ +ITPREFIX ## _iter_next(ITSTRUCT *node, ITTYPE start, ITTYPE last) \ +{ \ + struct rb_node *rb = node->ITRB.rb_right, *prev; \ + \ + while (true) { \ + /* \ + * Loop invariants: \ + * Cond1: ITSTART(node) <= last \ + * rb == node->ITRB.rb_right \ + * \ + * First, search right subtree if suitable \ + */ \ + if (rb) { \ + ITSTRUCT *right = rb_entry(rb, ITSTRUCT, ITRB); \ + if (start <= right->ITSUBTREE) \ + return ITPREFIX ## _subtree_search(right, \ + start, last); \ + } \ + \ + /* Move up the tree until we come from a node's left child */ \ + do { \ + rb = rb_parent(&node->ITRB); \ + if (!rb) \ + return NULL; \ + prev = &node->ITRB; \ + node = rb_entry(rb, ITSTRUCT, ITRB); \ + rb = node->ITRB.rb_right; \ + } while (prev == rb); \ + \ + /* Check if the node intersects [start;last] */ \ + if (last < ITSTART(node)) /* !Cond1 */ \ + return NULL; \ + else if (start <= ITLAST(node)) /* Cond2 */ \ + return node; \ + } \ +} diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 19dc455b4f3d..569d67d4243e 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -70,8 +70,7 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, * @p_end: ptr to ulong for end pfn of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL * - * Walks over configured memory ranges. Available after early_node_map is - * populated. + * Walks over configured memory ranges. */ #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 8d9489fdab2e..fd0e6d53836e 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -84,14 +84,14 @@ extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont); static inline -int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) +bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg) { - struct mem_cgroup *memcg; - int match; + struct mem_cgroup *task_memcg; + bool match; rcu_read_lock(); - memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner)); - match = __mem_cgroup_same_or_subtree(cgroup, memcg); + task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); + match = __mem_cgroup_same_or_subtree(memcg, task_memcg); rcu_read_unlock(); return match; } @@ -258,10 +258,10 @@ static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm return NULL; } -static inline int mm_match_cgroup(struct mm_struct *mm, +static inline bool mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *memcg) { - return 1; + return true; } static inline int task_in_mem_cgroup(struct task_struct *task, diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 910550f3b70e..95573ec4ee6c 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -10,6 +10,7 @@ struct page; struct zone; struct pglist_data; struct mem_section; +struct memory_block; #ifdef CONFIG_MEMORY_HOTPLUG @@ -233,6 +234,8 @@ static inline int is_mem_section_removable(unsigned long pfn, extern int mem_online_node(int nid); extern int add_memory(int nid, u64 start, u64 size); extern int arch_add_memory(int nid, u64 start, u64 size); +extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); +extern int offline_memory_block(struct memory_block *mem); extern int remove_memory(u64 start, u64 size); extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn, int nr_pages); diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h index 95b738c7abff..cec569325608 100644 --- a/include/linux/mempolicy.h +++ b/include/linux/mempolicy.h @@ -188,7 +188,7 @@ struct sp_node { struct shared_policy { struct rb_root root; - spinlock_t lock; + struct mutex mutex; }; void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol); @@ -239,7 +239,7 @@ extern int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol, /* Check if a vma is migratable */ static inline int vma_migratable(struct vm_area_struct *vma) { - if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED)) + if (vma->vm_flags & (VM_IO | VM_HUGETLB | VM_PFNMAP)) return 0; /* * Migration allocates pages in the highest zone. If we cannot diff --git a/include/linux/mm.h b/include/linux/mm.h index 311be906b57d..fa0680402738 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -10,7 +10,6 @@ #include <linux/list.h> #include <linux/mmzone.h> #include <linux/rbtree.h> -#include <linux/prio_tree.h> #include <linux/atomic.h> #include <linux/debug_locks.h> #include <linux/mm_types.h> @@ -21,6 +20,7 @@ struct mempolicy; struct anon_vma; +struct anon_vma_chain; struct file_ra_state; struct user_struct; struct writeback_control; @@ -70,6 +70,8 @@ extern unsigned int kobjsize(const void *objp); /* * vm_flags in vm_area_struct, see mm_types.h. */ +#define VM_NONE 0x00000000 + #define VM_READ 0x00000001 /* currently active flags */ #define VM_WRITE 0x00000002 #define VM_EXEC 0x00000004 @@ -82,16 +84,9 @@ extern unsigned int kobjsize(const void *objp); #define VM_MAYSHARE 0x00000080 #define VM_GROWSDOWN 0x00000100 /* general info on the segment */ -#if defined(CONFIG_STACK_GROWSUP) || defined(CONFIG_IA64) -#define VM_GROWSUP 0x00000200 -#else -#define VM_GROWSUP 0x00000000 -#define VM_NOHUGEPAGE 0x00000200 /* MADV_NOHUGEPAGE marked this vma */ -#endif #define VM_PFNMAP 0x00000400 /* Page-ranges managed without "struct page", just pure PFN */ #define VM_DENYWRITE 0x00000800 /* ETXTBSY on write attempts.. */ -#define VM_EXECUTABLE 0x00001000 #define VM_LOCKED 0x00002000 #define VM_IO 0x00004000 /* Memory mapped I/O or similar */ @@ -101,25 +96,34 @@ extern unsigned int kobjsize(const void *objp); #define VM_DONTCOPY 0x00020000 /* Do not copy this vma on fork */ #define VM_DONTEXPAND 0x00040000 /* Cannot expand with mremap() */ -#define VM_RESERVED 0x00080000 /* Count as reserved_vm like IO */ #define VM_ACCOUNT 0x00100000 /* Is a VM accounted object */ #define VM_NORESERVE 0x00200000 /* should the VM suppress accounting */ #define VM_HUGETLB 0x00400000 /* Huge TLB Page VM */ #define VM_NONLINEAR 0x00800000 /* Is non-linear (remap_file_pages) */ -#ifndef CONFIG_TRANSPARENT_HUGEPAGE -#define VM_MAPPED_COPY 0x01000000 /* T if mapped copy of data (nommu mmap) */ -#else -#define VM_HUGEPAGE 0x01000000 /* MADV_HUGEPAGE marked this vma */ -#endif -#define VM_INSERTPAGE 0x02000000 /* The vma has had "vm_insert_page()" done on it */ -#define VM_NODUMP 0x04000000 /* Do not include in the core dump */ +#define VM_ARCH_1 0x01000000 /* Architecture-specific flag */ +#define VM_DONTDUMP 0x04000000 /* Do not include in the core dump */ -#define VM_CAN_NONLINEAR 0x08000000 /* Has ->fault & does nonlinear pages */ #define VM_MIXEDMAP 0x10000000 /* Can contain "struct page" and pure PFN pages */ -#define VM_SAO 0x20000000 /* Strong Access Ordering (powerpc) */ -#define VM_PFN_AT_MMAP 0x40000000 /* PFNMAP vma that is fully mapped at mmap time */ +#define VM_HUGEPAGE 0x20000000 /* MADV_HUGEPAGE marked this vma */ +#define VM_NOHUGEPAGE 0x40000000 /* MADV_NOHUGEPAGE marked this vma */ #define VM_MERGEABLE 0x80000000 /* KSM may merge identical pages */ +#if defined(CONFIG_X86) +# define VM_PAT VM_ARCH_1 /* PAT reserves whole VMA at once (x86) */ +#elif defined(CONFIG_PPC) +# define VM_SAO VM_ARCH_1 /* Strong Access Ordering (powerpc) */ +#elif defined(CONFIG_PARISC) +# define VM_GROWSUP VM_ARCH_1 +#elif defined(CONFIG_IA64) +# define VM_GROWSUP VM_ARCH_1 +#elif !defined(CONFIG_MMU) +# define VM_MAPPED_COPY VM_ARCH_1 /* T if mapped copy of data (nommu mmap) */ +#endif + +#ifndef VM_GROWSUP +# define VM_GROWSUP VM_NONE +#endif + /* Bits set in the VMA until the stack is in its final location */ #define VM_STACK_INCOMPLETE_SETUP (VM_RAND_READ | VM_SEQ_READ) @@ -143,7 +147,7 @@ extern unsigned int kobjsize(const void *objp); * Special vmas that are non-mergable, non-mlock()able. * Note: mm/huge_memory.c VM_NO_THP depends on this definition. */ -#define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_RESERVED | VM_PFNMAP) +#define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP) /* * mapping from the currently active vm_flags protection bits (the @@ -157,24 +161,7 @@ extern pgprot_t protection_map[16]; #define FAULT_FLAG_ALLOW_RETRY 0x08 /* Retry fault if blocking */ #define FAULT_FLAG_RETRY_NOWAIT 0x10 /* Don't drop mmap_sem and wait when retrying */ #define FAULT_FLAG_KILLABLE 0x20 /* The fault task is in SIGKILL killable region */ - -/* - * This interface is used by x86 PAT code to identify a pfn mapping that is - * linear over entire vma. This is to optimize PAT code that deals with - * marking the physical region with a particular prot. This is not for generic - * mm use. Note also that this check will not work if the pfn mapping is - * linear for a vma starting at physical address 0. In which case PAT code - * falls back to slow path of reserving physical range page by page. - */ -static inline int is_linear_pfn_mapping(struct vm_area_struct *vma) -{ - return !!(vma->vm_flags & VM_PFN_AT_MMAP); -} - -static inline int is_pfn_mapping(struct vm_area_struct *vma) -{ - return !!(vma->vm_flags & VM_PFNMAP); -} +#define FAULT_FLAG_TRIED 0x40 /* second try */ /* * vm_fault is filled by the the pagefault handler and passed to the vma's @@ -182,8 +169,7 @@ static inline int is_pfn_mapping(struct vm_area_struct *vma) * of VM_FAULT_xxx flags that give details about how the fault was handled. * * pgoff should be used in favour of virtual_address, if possible. If pgoff - * is used, one may set VM_CAN_NONLINEAR in the vma->vm_flags to get nonlinear - * mapping support. + * is used, one may implement ->remap_pages to get nonlinear mapping support. */ struct vm_fault { unsigned int flags; /* FAULT_FLAG_xxx flags */ @@ -241,6 +227,9 @@ struct vm_operations_struct { int (*migrate)(struct vm_area_struct *vma, const nodemask_t *from, const nodemask_t *to, unsigned long flags); #endif + /* called by sys_remap_file_pages() to populate non-linear mapping */ + int (*remap_pages)(struct vm_area_struct *vma, unsigned long addr, + unsigned long size, pgoff_t pgoff); }; struct mmu_gather; @@ -249,6 +238,18 @@ struct inode; #define page_private(page) ((page)->private) #define set_page_private(page, v) ((page)->private = (v)) +/* It's valid only if the page is free path or free_list */ +static inline void set_freepage_migratetype(struct page *page, int migratetype) +{ + page->index = migratetype; +} + +/* It's valid only if the page is free path or free_list */ +static inline int get_freepage_migratetype(struct page *page) +{ + return page->index; +} + /* * FIXME: take this include out, include page-flags.h in * files which need it (119 of them) @@ -454,6 +455,7 @@ void put_pages_list(struct list_head *pages); void split_page(struct page *page, unsigned int order); int split_free_page(struct page *page); +int capture_free_page(struct page *page, int alloc_order, int migratetype); /* * Compound pages have a destructor function. Provide a @@ -1071,7 +1073,8 @@ vm_is_stack(struct task_struct *task, struct vm_area_struct *vma, int in_group); extern unsigned long move_page_tables(struct vm_area_struct *vma, unsigned long old_addr, struct vm_area_struct *new_vma, - unsigned long new_addr, unsigned long len); + unsigned long new_addr, unsigned long len, + bool need_rmap_locks); extern unsigned long do_mremap(unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flags, unsigned long new_addr); @@ -1366,24 +1369,45 @@ extern void zone_pcp_reset(struct zone *zone); extern atomic_long_t mmap_pages_allocated; extern int nommu_shrink_inode_mappings(struct inode *, size_t, size_t); -/* prio_tree.c */ -void vma_prio_tree_add(struct vm_area_struct *, struct vm_area_struct *old); -void vma_prio_tree_insert(struct vm_area_struct *, struct prio_tree_root *); -void vma_prio_tree_remove(struct vm_area_struct *, struct prio_tree_root *); -struct vm_area_struct *vma_prio_tree_next(struct vm_area_struct *vma, - struct prio_tree_iter *iter); - -#define vma_prio_tree_foreach(vma, iter, root, begin, end) \ - for (prio_tree_iter_init(iter, root, begin, end), vma = NULL; \ - (vma = vma_prio_tree_next(vma, iter)); ) +/* interval_tree.c */ +void vma_interval_tree_insert(struct vm_area_struct *node, + struct rb_root *root); +void vma_interval_tree_insert_after(struct vm_area_struct *node, + struct vm_area_struct *prev, + struct rb_root *root); +void vma_interval_tree_remove(struct vm_area_struct *node, + struct rb_root *root); +struct vm_area_struct *vma_interval_tree_iter_first(struct rb_root *root, + unsigned long start, unsigned long last); +struct vm_area_struct *vma_interval_tree_iter_next(struct vm_area_struct *node, + unsigned long start, unsigned long last); + +#define vma_interval_tree_foreach(vma, root, start, last) \ + for (vma = vma_interval_tree_iter_first(root, start, last); \ + vma; vma = vma_interval_tree_iter_next(vma, start, last)) static inline void vma_nonlinear_insert(struct vm_area_struct *vma, struct list_head *list) { - vma->shared.vm_set.parent = NULL; - list_add_tail(&vma->shared.vm_set.list, list); + list_add_tail(&vma->shared.nonlinear, list); } +void anon_vma_interval_tree_insert(struct anon_vma_chain *node, + struct rb_root *root); +void anon_vma_interval_tree_remove(struct anon_vma_chain *node, + struct rb_root *root); +struct anon_vma_chain *anon_vma_interval_tree_iter_first( + struct rb_root *root, unsigned long start, unsigned long last); +struct anon_vma_chain *anon_vma_interval_tree_iter_next( + struct anon_vma_chain *node, unsigned long start, unsigned long last); +#ifdef CONFIG_DEBUG_VM_RB +void anon_vma_interval_tree_verify(struct anon_vma_chain *node); +#endif + +#define anon_vma_interval_tree_foreach(avc, root, start, last) \ + for (avc = anon_vma_interval_tree_iter_first(root, start, last); \ + avc; avc = anon_vma_interval_tree_iter_next(avc, start, last)) + /* mmap.c */ extern int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin); extern int vma_adjust(struct vm_area_struct *vma, unsigned long start, @@ -1400,15 +1424,13 @@ extern void __vma_link_rb(struct mm_struct *, struct vm_area_struct *, struct rb_node **, struct rb_node *); extern void unlink_file_vma(struct vm_area_struct *); extern struct vm_area_struct *copy_vma(struct vm_area_struct **, - unsigned long addr, unsigned long len, pgoff_t pgoff); + unsigned long addr, unsigned long len, pgoff_t pgoff, + bool *need_rmap_locks); extern void exit_mmap(struct mm_struct *); extern int mm_take_all_locks(struct mm_struct *mm); extern void mm_drop_all_locks(struct mm_struct *mm); -/* From fs/proc/base.c. callers must _not_ hold the mm's exe_file_lock */ -extern void added_exe_file_vma(struct mm_struct *mm); -extern void removed_exe_file_vma(struct mm_struct *mm); extern void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file); extern struct file *get_mm_exe_file(struct mm_struct *mm); @@ -1662,5 +1684,9 @@ static inline unsigned int debug_guardpage_minorder(void) { return 0; } static inline bool page_is_guard(struct page *page) { return false; } #endif /* CONFIG_DEBUG_PAGEALLOC */ +extern void reset_zone_present_pages(void); +extern void fixup_zone_present_pages(int nid, unsigned long start_pfn, + unsigned long end_pfn); + #endif /* __KERNEL__ */ #endif /* _LINUX_MM_H */ diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index bf7867200b95..31f8a3af7d94 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -6,7 +6,6 @@ #include <linux/threads.h> #include <linux/list.h> #include <linux/spinlock.h> -#include <linux/prio_tree.h> #include <linux/rbtree.h> #include <linux/rwsem.h> #include <linux/completion.h> @@ -240,18 +239,15 @@ struct vm_area_struct { /* * For areas with an address space and backing store, - * linkage into the address_space->i_mmap prio tree, or - * linkage to the list of like vmas hanging off its node, or + * linkage into the address_space->i_mmap interval tree, or * linkage of vma in the address_space->i_mmap_nonlinear list. */ union { struct { - struct list_head list; - void *parent; /* aligns with prio_tree_node parent */ - struct vm_area_struct *head; - } vm_set; - - struct raw_prio_tree_node prio_tree_node; + struct rb_node rb; + unsigned long rb_subtree_last; + } linear; + struct list_head nonlinear; } shared; /* @@ -349,7 +345,6 @@ struct mm_struct { unsigned long shared_vm; /* Shared pages (files) */ unsigned long exec_vm; /* VM_EXEC & ~VM_WRITE */ unsigned long stack_vm; /* VM_GROWSUP/DOWN */ - unsigned long reserved_vm; /* VM_RESERVED|VM_IO pages */ unsigned long def_flags; unsigned long nr_ptes; /* Page table pages */ unsigned long start_code, end_code, start_data, end_data; @@ -394,7 +389,6 @@ struct mm_struct { /* store ref to file /proc/<pid>/exe symlink points to */ struct file *exe_file; - unsigned long num_exe_file_vmas; #ifdef CONFIG_MMU_NOTIFIER struct mmu_notifier_mm *mmu_notifier_mm; #endif diff --git a/include/linux/mman.h b/include/linux/mman.h index 8b74e9b1d0ad..77cec2f45cb7 100644 --- a/include/linux/mman.h +++ b/include/linux/mman.h @@ -86,7 +86,6 @@ calc_vm_flag_bits(unsigned long flags) { return _calc_vm_trans(flags, MAP_GROWSDOWN, VM_GROWSDOWN ) | _calc_vm_trans(flags, MAP_DENYWRITE, VM_DENYWRITE ) | - _calc_vm_trans(flags, MAP_EXECUTABLE, VM_EXECUTABLE) | _calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ); } #endif /* __KERNEL__ */ diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 1d1b1e13f79f..bc823c4c028b 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -4,6 +4,7 @@ #include <linux/list.h> #include <linux/spinlock.h> #include <linux/mm_types.h> +#include <linux/srcu.h> struct mmu_notifier; struct mmu_notifier_ops; @@ -245,50 +246,6 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm) __mmu_notifier_mm_destroy(mm); } -/* - * These two macros will sometime replace ptep_clear_flush. - * ptep_clear_flush is implemented as macro itself, so this also is - * implemented as a macro until ptep_clear_flush will converted to an - * inline function, to diminish the risk of compilation failure. The - * invalidate_page method over time can be moved outside the PT lock - * and these two macros can be later removed. - */ -#define ptep_clear_flush_notify(__vma, __address, __ptep) \ -({ \ - pte_t __pte; \ - struct vm_area_struct *___vma = __vma; \ - unsigned long ___address = __address; \ - __pte = ptep_clear_flush(___vma, ___address, __ptep); \ - mmu_notifier_invalidate_page(___vma->vm_mm, ___address); \ - __pte; \ -}) - -#define pmdp_clear_flush_notify(__vma, __address, __pmdp) \ -({ \ - pmd_t __pmd; \ - struct vm_area_struct *___vma = __vma; \ - unsigned long ___address = __address; \ - VM_BUG_ON(__address & ~HPAGE_PMD_MASK); \ - mmu_notifier_invalidate_range_start(___vma->vm_mm, ___address, \ - (__address)+HPAGE_PMD_SIZE);\ - __pmd = pmdp_clear_flush(___vma, ___address, __pmdp); \ - mmu_notifier_invalidate_range_end(___vma->vm_mm, ___address, \ - (__address)+HPAGE_PMD_SIZE); \ - __pmd; \ -}) - -#define pmdp_splitting_flush_notify(__vma, __address, __pmdp) \ -({ \ - struct vm_area_struct *___vma = __vma; \ - unsigned long ___address = __address; \ - VM_BUG_ON(__address & ~HPAGE_PMD_MASK); \ - mmu_notifier_invalidate_range_start(___vma->vm_mm, ___address, \ - (__address)+HPAGE_PMD_SIZE);\ - pmdp_splitting_flush(___vma, ___address, __pmdp); \ - mmu_notifier_invalidate_range_end(___vma->vm_mm, ___address, \ - (__address)+HPAGE_PMD_SIZE); \ -}) - #define ptep_clear_flush_young_notify(__vma, __address, __ptep) \ ({ \ int __young; \ @@ -311,14 +268,24 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm) __young; \ }) +/* + * set_pte_at_notify() sets the pte _after_ running the notifier. + * This is safe to start by updating the secondary MMUs, because the primary MMU + * pte invalidate must have already happened with a ptep_clear_flush() before + * set_pte_at_notify() has been invoked. Updating the secondary MMUs first is + * required when we change both the protection of the mapping from read-only to + * read-write and the pfn (like during copy on write page faults). Otherwise the + * old page would remain mapped readonly in the secondary MMUs after the new + * page is already writable by some CPU through the primary MMU. + */ #define set_pte_at_notify(__mm, __address, __ptep, __pte) \ ({ \ struct mm_struct *___mm = __mm; \ unsigned long ___address = __address; \ pte_t ___pte = __pte; \ \ - set_pte_at(___mm, ___address, __ptep, ___pte); \ mmu_notifier_change_pte(___mm, ___address, ___pte); \ + set_pte_at(___mm, ___address, __ptep, ___pte); \ }) #else /* CONFIG_MMU_NOTIFIER */ @@ -369,9 +336,6 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm) #define ptep_clear_flush_young_notify ptep_clear_flush_young #define pmdp_clear_flush_young_notify pmdp_clear_flush_young -#define ptep_clear_flush_notify ptep_clear_flush -#define pmdp_clear_flush_notify pmdp_clear_flush -#define pmdp_splitting_flush_notify pmdp_splitting_flush #define set_pte_at_notify set_pte_at #endif /* CONFIG_MMU_NOTIFIER */ diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 2daa54f55db7..50aaca81f63d 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -142,6 +142,7 @@ enum zone_stat_item { NUMA_OTHER, /* allocation from other node */ #endif NR_ANON_TRANSPARENT_HUGEPAGES, + NR_FREE_CMA_PAGES, NR_VM_ZONE_STAT_ITEMS }; /* @@ -217,6 +218,8 @@ struct lruvec { #define ISOLATE_UNMAPPED ((__force isolate_mode_t)0x2) /* Isolate for asynchronous migration */ #define ISOLATE_ASYNC_MIGRATE ((__force isolate_mode_t)0x4) +/* Isolate unevictable pages */ +#define ISOLATE_UNEVICTABLE ((__force isolate_mode_t)0x8) /* LRU Isolation modes. */ typedef unsigned __bitwise__ isolate_mode_t; @@ -369,8 +372,12 @@ struct zone { spinlock_t lock; int all_unreclaimable; /* All pages pinned */ #if defined CONFIG_COMPACTION || defined CONFIG_CMA - /* pfn where the last incremental compaction isolated free pages */ + /* Set to true when the PG_migrate_skip bits should be cleared */ + bool compact_blockskip_flush; + + /* pfns where compaction scanners should start */ unsigned long compact_cached_free_pfn; + unsigned long compact_cached_migrate_pfn; #endif #ifdef CONFIG_MEMORY_HOTPLUG /* see spanned/present_pages for more description */ @@ -704,6 +711,7 @@ typedef struct pglist_data { unsigned long node_spanned_pages; /* total size of physical page range, including holes */ int node_id; + nodemask_t reclaim_nodes; /* Nodes allowed to reclaim from */ wait_queue_head_t kswapd_wait; wait_queue_head_t pfmemalloc_wait; struct task_struct *kswapd; /* Protected by lock_memory_hotplug() */ diff --git a/include/linux/oom.h b/include/linux/oom.h index 49a3031fda50..d36a8221f58b 100644 --- a/include/linux/oom.h +++ b/include/linux/oom.h @@ -2,17 +2,6 @@ #define __INCLUDE_LINUX_OOM_H /* - * /proc/<pid>/oom_adj is deprecated, see - * Documentation/feature-removal-schedule.txt. - * - * /proc/<pid>/oom_adj set to -17 protects from the oom-killer - */ -#define OOM_DISABLE (-17) -/* inclusive */ -#define OOM_ADJUST_MIN (-16) -#define OOM_ADJUST_MAX 15 - -/* * /proc/<pid>/oom_score_adj set to OOM_SCORE_ADJ_MIN disables oom killing for * pid. */ diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h index 105077aa7685..76a9539cfd3f 100644 --- a/include/linux/page-isolation.h +++ b/include/linux/page-isolation.h @@ -6,6 +6,10 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count); void set_pageblock_migratetype(struct page *page, int migratetype); int move_freepages_block(struct zone *zone, struct page *page, int migratetype); +int move_freepages(struct zone *zone, + struct page *start_page, struct page *end_page, + int migratetype); + /* * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE. * If specified range includes migrate types other than MOVABLE or CMA, @@ -37,6 +41,7 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn); */ int set_migratetype_isolate(struct page *page); void unset_migratetype_isolate(struct page *page, unsigned migratetype); - +struct page *alloc_migrate_target(struct page *page, unsigned long private, + int **resultp); #endif diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h index 19ef95d293ae..eed27f4f4c3e 100644 --- a/include/linux/pageblock-flags.h +++ b/include/linux/pageblock-flags.h @@ -30,6 +30,9 @@ enum pageblock_bits { PB_migrate, PB_migrate_end = PB_migrate + 3 - 1, /* 3 bits required for migrate types */ +#ifdef CONFIG_COMPACTION + PB_migrate_skip,/* If set the block is skipped by compaction */ +#endif /* CONFIG_COMPACTION */ NR_PAGEBLOCK_BITS }; @@ -65,10 +68,22 @@ unsigned long get_pageblock_flags_group(struct page *page, void set_pageblock_flags_group(struct page *page, unsigned long flags, int start_bitidx, int end_bitidx); +#ifdef CONFIG_COMPACTION +#define get_pageblock_skip(page) \ + get_pageblock_flags_group(page, PB_migrate_skip, \ + PB_migrate_skip + 1) +#define clear_pageblock_skip(page) \ + set_pageblock_flags_group(page, 0, PB_migrate_skip, \ + PB_migrate_skip + 1) +#define set_pageblock_skip(page) \ + set_pageblock_flags_group(page, 1, PB_migrate_skip, \ + PB_migrate_skip + 1) +#endif /* CONFIG_COMPACTION */ + #define get_pageblock_flags(page) \ - get_pageblock_flags_group(page, 0, NR_PAGEBLOCK_BITS-1) + get_pageblock_flags_group(page, 0, PB_migrate_end) #define set_pageblock_flags(page, flags) \ set_pageblock_flags_group(page, flags, \ - 0, NR_PAGEBLOCK_BITS-1) + 0, PB_migrate_end) #endif /* PAGEBLOCK_FLAGS_H */ diff --git a/include/linux/prio_tree.h b/include/linux/prio_tree.h deleted file mode 100644 index db04abb557e0..000000000000 --- a/include/linux/prio_tree.h +++ /dev/null @@ -1,120 +0,0 @@ -#ifndef _LINUX_PRIO_TREE_H -#define _LINUX_PRIO_TREE_H - -/* - * K&R 2nd ed. A8.3 somewhat obliquely hints that initial sequences of struct - * fields with identical types should end up at the same location. We'll use - * this until we can scrap struct raw_prio_tree_node. - * - * Note: all this could be done more elegantly by using unnamed union/struct - * fields. However, gcc 2.95.3 and apparently also gcc 3.0.4 don't support this - * language extension. - */ - -struct raw_prio_tree_node { - struct prio_tree_node *left; - struct prio_tree_node *right; - struct prio_tree_node *parent; -}; - -struct prio_tree_node { - struct prio_tree_node *left; - struct prio_tree_node *right; - struct prio_tree_node *parent; - unsigned long start; - unsigned long last; /* last location _in_ interval */ -}; - -struct prio_tree_root { - struct prio_tree_node *prio_tree_node; - unsigned short index_bits; - unsigned short raw; - /* - * 0: nodes are of type struct prio_tree_node - * 1: nodes are of type raw_prio_tree_node - */ -}; - -struct prio_tree_iter { - struct prio_tree_node *cur; - unsigned long mask; - unsigned long value; - int size_level; - - struct prio_tree_root *root; - pgoff_t r_index; - pgoff_t h_index; -}; - -static inline void prio_tree_iter_init(struct prio_tree_iter *iter, - struct prio_tree_root *root, pgoff_t r_index, pgoff_t h_index) -{ - iter->root = root; - iter->r_index = r_index; - iter->h_index = h_index; - iter->cur = NULL; -} - -#define __INIT_PRIO_TREE_ROOT(ptr, _raw) \ -do { \ - (ptr)->prio_tree_node = NULL; \ - (ptr)->index_bits = 1; \ - (ptr)->raw = (_raw); \ -} while (0) - -#define INIT_PRIO_TREE_ROOT(ptr) __INIT_PRIO_TREE_ROOT(ptr, 0) -#define INIT_RAW_PRIO_TREE_ROOT(ptr) __INIT_PRIO_TREE_ROOT(ptr, 1) - -#define INIT_PRIO_TREE_NODE(ptr) \ -do { \ - (ptr)->left = (ptr)->right = (ptr)->parent = (ptr); \ -} while (0) - -#define INIT_PRIO_TREE_ITER(ptr) \ -do { \ - (ptr)->cur = NULL; \ - (ptr)->mask = 0UL; \ - (ptr)->value = 0UL; \ - (ptr)->size_level = 0; \ -} while (0) - -#define prio_tree_entry(ptr, type, member) \ - ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member))) - -static inline int prio_tree_empty(const struct prio_tree_root *root) -{ - return root->prio_tree_node == NULL; -} - -static inline int prio_tree_root(const struct prio_tree_node *node) -{ - return node->parent == node; -} - -static inline int prio_tree_left_empty(const struct prio_tree_node *node) -{ - return node->left == node; -} - -static inline int prio_tree_right_empty(const struct prio_tree_node *node) -{ - return node->right == node; -} - - -struct prio_tree_node *prio_tree_replace(struct prio_tree_root *root, - struct prio_tree_node *old, struct prio_tree_node *node); -struct prio_tree_node *prio_tree_insert(struct prio_tree_root *root, - struct prio_tree_node *node); -void prio_tree_remove(struct prio_tree_root *root, struct prio_tree_node *node); -struct prio_tree_node *prio_tree_next(struct prio_tree_iter *iter); - -#define raw_prio_tree_replace(root, old, node) \ - prio_tree_replace(root, (struct prio_tree_node *) (old), \ - (struct prio_tree_node *) (node)) -#define raw_prio_tree_insert(root, node) \ - prio_tree_insert(root, (struct prio_tree_node *) (node)) -#define raw_prio_tree_remove(root, node) \ - prio_tree_remove(root, (struct prio_tree_node *) (node)) - -#endif /* _LINUX_PRIO_TREE_H */ diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h index 033b507b33b1..0022c1bb1e26 100644 --- a/include/linux/rbtree.h +++ b/include/linux/rbtree.h @@ -23,72 +23,7 @@ I know it's not the cleaner way, but in C (not in C++) to get performances and genericity... - Some example of insert and search follows here. The search is a plain - normal search over an ordered tree. The insert instead must be implemented - in two steps: First, the code must insert the element in order as a red leaf - in the tree, and then the support library function rb_insert_color() must - be called. Such function will do the not trivial work to rebalance the - rbtree, if necessary. - ------------------------------------------------------------------------ -static inline struct page * rb_search_page_cache(struct inode * inode, - unsigned long offset) -{ - struct rb_node * n = inode->i_rb_page_cache.rb_node; - struct page * page; - - while (n) - { - page = rb_entry(n, struct page, rb_page_cache); - - if (offset < page->offset) - n = n->rb_left; - else if (offset > page->offset) - n = n->rb_right; - else - return page; - } - return NULL; -} - -static inline struct page * __rb_insert_page_cache(struct inode * inode, - unsigned long offset, - struct rb_node * node) -{ - struct rb_node ** p = &inode->i_rb_page_cache.rb_node; - struct rb_node * parent = NULL; - struct page * page; - - while (*p) - { - parent = *p; - page = rb_entry(parent, struct page, rb_page_cache); - - if (offset < page->offset) - p = &(*p)->rb_left; - else if (offset > page->offset) - p = &(*p)->rb_right; - else - return page; - } - - rb_link_node(node, parent, p); - - return NULL; -} - -static inline struct page * rb_insert_page_cache(struct inode * inode, - unsigned long offset, - struct rb_node * node) -{ - struct page * ret; - if ((ret = __rb_insert_page_cache(inode, offset, node))) - goto out; - rb_insert_color(node, &inode->i_rb_page_cache); - out: - return ret; -} ------------------------------------------------------------------------ + See Documentation/rbtree.txt for documentation and samples. */ #ifndef _LINUX_RBTREE_H @@ -97,63 +32,35 @@ static inline struct page * rb_insert_page_cache(struct inode * inode, #include <linux/kernel.h> #include <linux/stddef.h> -struct rb_node -{ - unsigned long rb_parent_color; -#define RB_RED 0 -#define RB_BLACK 1 +struct rb_node { + unsigned long __rb_parent_color; struct rb_node *rb_right; struct rb_node *rb_left; } __attribute__((aligned(sizeof(long)))); /* The alignment might seem pointless, but allegedly CRIS needs it */ -struct rb_root -{ +struct rb_root { struct rb_node *rb_node; }; -#define rb_parent(r) ((struct rb_node *)((r)->rb_parent_color & ~3)) -#define rb_color(r) ((r)->rb_parent_color & 1) -#define rb_is_red(r) (!rb_color(r)) -#define rb_is_black(r) rb_color(r) -#define rb_set_red(r) do { (r)->rb_parent_color &= ~1; } while (0) -#define rb_set_black(r) do { (r)->rb_parent_color |= 1; } while (0) - -static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p) -{ - rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p; -} -static inline void rb_set_color(struct rb_node *rb, int color) -{ - rb->rb_parent_color = (rb->rb_parent_color & ~1) | color; -} +#define rb_parent(r) ((struct rb_node *)((r)->__rb_parent_color & ~3)) #define RB_ROOT (struct rb_root) { NULL, } #define rb_entry(ptr, type, member) container_of(ptr, type, member) -#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL) -#define RB_EMPTY_NODE(node) (rb_parent(node) == node) -#define RB_CLEAR_NODE(node) (rb_set_parent(node, node)) +#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL) + +/* 'empty' nodes are nodes that are known not to be inserted in an rbree */ +#define RB_EMPTY_NODE(node) \ + ((node)->__rb_parent_color == (unsigned long)(node)) +#define RB_CLEAR_NODE(node) \ + ((node)->__rb_parent_color = (unsigned long)(node)) -static inline void rb_init_node(struct rb_node *rb) -{ - rb->rb_parent_color = 0; - rb->rb_right = NULL; - rb->rb_left = NULL; - RB_CLEAR_NODE(rb); -} extern void rb_insert_color(struct rb_node *, struct rb_root *); extern void rb_erase(struct rb_node *, struct rb_root *); -typedef void (*rb_augment_f)(struct rb_node *node, void *data); - -extern void rb_augment_insert(struct rb_node *node, - rb_augment_f func, void *data); -extern struct rb_node *rb_augment_erase_begin(struct rb_node *node); -extern void rb_augment_erase_end(struct rb_node *node, - rb_augment_f func, void *data); /* Find logical next and previous nodes in a tree */ extern struct rb_node *rb_next(const struct rb_node *); @@ -168,7 +75,7 @@ extern void rb_replace_node(struct rb_node *victim, struct rb_node *new, static inline void rb_link_node(struct rb_node * node, struct rb_node * parent, struct rb_node ** rb_link) { - node->rb_parent_color = (unsigned long )parent; + node->__rb_parent_color = (unsigned long)parent; node->rb_left = node->rb_right = NULL; *rb_link = node; diff --git a/include/linux/rbtree_augmented.h b/include/linux/rbtree_augmented.h new file mode 100644 index 000000000000..214caa33433b --- /dev/null +++ b/include/linux/rbtree_augmented.h @@ -0,0 +1,223 @@ +/* + Red Black Trees + (C) 1999 Andrea Arcangeli <andrea@suse.de> + (C) 2002 David Woodhouse <dwmw2@infradead.org> + (C) 2012 Michel Lespinasse <walken@google.com> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + linux/include/linux/rbtree_augmented.h +*/ + +#ifndef _LINUX_RBTREE_AUGMENTED_H +#define _LINUX_RBTREE_AUGMENTED_H + +#include <linux/rbtree.h> + +/* + * Please note - only struct rb_augment_callbacks and the prototypes for + * rb_insert_augmented() and rb_erase_augmented() are intended to be public. + * The rest are implementation details you are not expected to depend on. + * + * See Documentation/rbtree.txt for documentation and samples. + */ + +struct rb_augment_callbacks { + void (*propagate)(struct rb_node *node, struct rb_node *stop); + void (*copy)(struct rb_node *old, struct rb_node *new); + void (*rotate)(struct rb_node *old, struct rb_node *new); +}; + +extern void __rb_insert_augmented(struct rb_node *node, struct rb_root *root, + void (*augment_rotate)(struct rb_node *old, struct rb_node *new)); +static inline void +rb_insert_augmented(struct rb_node *node, struct rb_root *root, + const struct rb_augment_callbacks *augment) +{ + __rb_insert_augmented(node, root, augment->rotate); +} + +#define RB_DECLARE_CALLBACKS(rbstatic, rbname, rbstruct, rbfield, \ + rbtype, rbaugmented, rbcompute) \ +static inline void \ +rbname ## _propagate(struct rb_node *rb, struct rb_node *stop) \ +{ \ + while (rb != stop) { \ + rbstruct *node = rb_entry(rb, rbstruct, rbfield); \ + rbtype augmented = rbcompute(node); \ + if (node->rbaugmented == augmented) \ + break; \ + node->rbaugmented = augmented; \ + rb = rb_parent(&node->rbfield); \ + } \ +} \ +static inline void \ +rbname ## _copy(struct rb_node *rb_old, struct rb_node *rb_new) \ +{ \ + rbstruct *old = rb_entry(rb_old, rbstruct, rbfield); \ + rbstruct *new = rb_entry(rb_new, rbstruct, rbfield); \ + new->rbaugmented = old->rbaugmented; \ +} \ +static void \ +rbname ## _rotate(struct rb_node *rb_old, struct rb_node *rb_new) \ +{ \ + rbstruct *old = rb_entry(rb_old, rbstruct, rbfield); \ + rbstruct *new = rb_entry(rb_new, rbstruct, rbfield); \ + new->rbaugmented = old->rbaugmented; \ + old->rbaugmented = rbcompute(old); \ +} \ +rbstatic const struct rb_augment_callbacks rbname = { \ + rbname ## _propagate, rbname ## _copy, rbname ## _rotate \ +}; + + +#define RB_RED 0 +#define RB_BLACK 1 + +#define __rb_parent(pc) ((struct rb_node *)(pc & ~3)) + +#define __rb_color(pc) ((pc) & 1) +#define __rb_is_black(pc) __rb_color(pc) +#define __rb_is_red(pc) (!__rb_color(pc)) +#define rb_color(rb) __rb_color((rb)->__rb_parent_color) +#define rb_is_red(rb) __rb_is_red((rb)->__rb_parent_color) +#define rb_is_black(rb) __rb_is_black((rb)->__rb_parent_color) + +static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p) +{ + rb->__rb_parent_color = rb_color(rb) | (unsigned long)p; +} + +static inline void rb_set_parent_color(struct rb_node *rb, + struct rb_node *p, int color) +{ + rb->__rb_parent_color = (unsigned long)p | color; +} + +static inline void +__rb_change_child(struct rb_node *old, struct rb_node *new, + struct rb_node *parent, struct rb_root *root) +{ + if (parent) { + if (parent->rb_left == old) + parent->rb_left = new; + else + parent->rb_right = new; + } else + root->rb_node = new; +} + +extern void __rb_erase_color(struct rb_node *parent, struct rb_root *root, + void (*augment_rotate)(struct rb_node *old, struct rb_node *new)); + +static __always_inline void +rb_erase_augmented(struct rb_node *node, struct rb_root *root, + const struct rb_augment_callbacks *augment) +{ + struct rb_node *child = node->rb_right, *tmp = node->rb_left; + struct rb_node *parent, *rebalance; + unsigned long pc; + + if (!tmp) { + /* + * Case 1: node to erase has no more than 1 child (easy!) + * + * Note that if there is one child it must be red due to 5) + * and node must be black due to 4). We adjust colors locally + * so as to bypass __rb_erase_color() later on. + */ + pc = node->__rb_parent_color; + parent = __rb_parent(pc); + __rb_change_child(node, child, parent, root); + if (child) { + child->__rb_parent_color = pc; + rebalance = NULL; + } else + rebalance = __rb_is_black(pc) ? parent : NULL; + tmp = parent; + } else if (!child) { + /* Still case 1, but this time the child is node->rb_left */ + tmp->__rb_parent_color = pc = node->__rb_parent_color; + parent = __rb_parent(pc); + __rb_change_child(node, tmp, parent, root); + rebalance = NULL; + tmp = parent; + } else { + struct rb_node *successor = child, *child2; + tmp = child->rb_left; + if (!tmp) { + /* + * Case 2: node's successor is its right child + * + * (n) (s) + * / \ / \ + * (x) (s) -> (x) (c) + * \ + * (c) + */ + parent = successor; + child2 = successor->rb_right; + augment->copy(node, successor); + } else { + /* + * Case 3: node's successor is leftmost under + * node's right child subtree + * + * (n) (s) + * / \ / \ + * (x) (y) -> (x) (y) + * / / + * (p) (p) + * / / + * (s) (c) + * \ + * (c) + */ + do { + parent = successor; + successor = tmp; + tmp = tmp->rb_left; + } while (tmp); + parent->rb_left = child2 = successor->rb_right; + successor->rb_right = child; + rb_set_parent(child, successor); + augment->copy(node, successor); + augment->propagate(parent, successor); + } + + successor->rb_left = tmp = node->rb_left; + rb_set_parent(tmp, successor); + + pc = node->__rb_parent_color; + tmp = __rb_parent(pc); + __rb_change_child(node, successor, tmp, root); + if (child2) { + successor->__rb_parent_color = pc; + rb_set_parent_color(child2, parent, RB_BLACK); + rebalance = NULL; + } else { + unsigned long pc2 = successor->__rb_parent_color; + successor->__rb_parent_color = pc; + rebalance = __rb_is_black(pc2) ? parent : NULL; + } + tmp = successor; + } + + augment->propagate(tmp, NULL); + if (rebalance) + __rb_erase_color(rebalance, root, augment->rotate); +} + +#endif /* _LINUX_RBTREE_AUGMENTED_H */ diff --git a/include/linux/rmap.h b/include/linux/rmap.h index 3fce545df394..bfe1f4780644 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -37,14 +37,14 @@ struct anon_vma { atomic_t refcount; /* - * NOTE: the LSB of the head.next is set by + * NOTE: the LSB of the rb_root.rb_node is set by * mm_take_all_locks() _after_ taking the above lock. So the - * head must only be read/written after taking the above lock + * rb_root must only be read/written after taking the above lock * to be sure to see a valid next pointer. The LSB bit itself * is serialized by a system wide lock only visible to * mm_take_all_locks() (mm_all_locks_mutex). */ - struct list_head head; /* Chain of private "related" vmas */ + struct rb_root rb_root; /* Interval tree of private "related" vmas */ }; /* @@ -57,14 +57,29 @@ struct anon_vma { * with a VMA, or the VMAs associated with an anon_vma. * The "same_vma" list contains the anon_vma_chains linking * all the anon_vmas associated with this VMA. - * The "same_anon_vma" list contains the anon_vma_chains + * The "rb" field indexes on an interval tree the anon_vma_chains * which link all the VMAs associated with this anon_vma. */ struct anon_vma_chain { struct vm_area_struct *vma; struct anon_vma *anon_vma; struct list_head same_vma; /* locked by mmap_sem & page_table_lock */ - struct list_head same_anon_vma; /* locked by anon_vma->mutex */ + struct rb_node rb; /* locked by anon_vma->mutex */ + unsigned long rb_subtree_last; +#ifdef CONFIG_DEBUG_VM_RB + unsigned long cached_vma_start, cached_vma_last; +#endif +}; + +enum ttu_flags { + TTU_UNMAP = 0, /* unmap mode */ + TTU_MIGRATION = 1, /* migration mode */ + TTU_MUNLOCK = 2, /* munlock mode */ + TTU_ACTION_MASK = 0xff, + + TTU_IGNORE_MLOCK = (1 << 8), /* ignore mlock */ + TTU_IGNORE_ACCESS = (1 << 9), /* don't age */ + TTU_IGNORE_HWPOISON = (1 << 10),/* corrupted page is recoverable */ }; #ifdef CONFIG_MMU @@ -120,7 +135,6 @@ void anon_vma_init(void); /* create anon_vma_cachep */ int anon_vma_prepare(struct vm_area_struct *); void unlink_anon_vmas(struct vm_area_struct *); int anon_vma_clone(struct vm_area_struct *, struct vm_area_struct *); -void anon_vma_moveto_tail(struct vm_area_struct *); int anon_vma_fork(struct vm_area_struct *, struct vm_area_struct *); static inline void anon_vma_merge(struct vm_area_struct *vma, @@ -161,16 +175,6 @@ int page_referenced(struct page *, int is_locked, int page_referenced_one(struct page *, struct vm_area_struct *, unsigned long address, unsigned int *mapcount, unsigned long *vm_flags); -enum ttu_flags { - TTU_UNMAP = 0, /* unmap mode */ - TTU_MIGRATION = 1, /* migration mode */ - TTU_MUNLOCK = 2, /* munlock mode */ - TTU_ACTION_MASK = 0xff, - - TTU_IGNORE_MLOCK = (1 << 8), /* ignore mlock */ - TTU_IGNORE_ACCESS = (1 << 9), /* don't age */ - TTU_IGNORE_HWPOISON = (1 << 10),/* corrupted page is recoverable */ -}; #define TTU_ACTION(x) ((x) & TTU_ACTION_MASK) int try_to_unmap(struct page *, enum ttu_flags flags); diff --git a/include/linux/sched.h b/include/linux/sched.h index 9c5612f0374b..c2070e92a9d6 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -671,7 +671,6 @@ struct signal_struct { struct rw_semaphore group_rwsem; #endif - int oom_adj; /* OOM kill score adjustment (bit shift) */ int oom_score_adj; /* OOM kill score adjustment */ int oom_score_adj_min; /* OOM kill score adjustment minimum value. * Only settable by CAP_SYS_RESOURCE. */ diff --git a/include/linux/swap.h b/include/linux/swap.h index 388e70601413..68df9c17fbbb 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -281,7 +281,7 @@ static inline int zone_reclaim(struct zone *z, gfp_t mask, unsigned int order) } #endif -extern int page_evictable(struct page *page, struct vm_area_struct *vma); +extern int page_evictable(struct page *page); extern void check_move_unevictable_pages(struct page **, int nr_pages); extern unsigned long scan_unevictable_pages; diff --git a/include/linux/timerqueue.h b/include/linux/timerqueue.h index 5088727478fd..a520fd70a59f 100644 --- a/include/linux/timerqueue.h +++ b/include/linux/timerqueue.h @@ -39,7 +39,7 @@ struct timerqueue_node *timerqueue_getnext(struct timerqueue_head *head) static inline void timerqueue_init(struct timerqueue_node *node) { - rb_init_node(&node->node); + RB_CLEAR_NODE(&node->node); } static inline void timerqueue_init_head(struct timerqueue_head *head) diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 57f7b1091511..3d3114594370 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -52,7 +52,6 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, UNEVICTABLE_PGMUNLOCKED, UNEVICTABLE_PGCLEARED, /* on COW, page truncate */ UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */ - UNEVICTABLE_MLOCKFREED, #ifdef CONFIG_TRANSPARENT_HUGEPAGE THP_FAULT_ALLOC, THP_FAULT_FALLBACK, diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index ad2cfd53dadc..92a86b2cce33 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -198,6 +198,8 @@ extern void __dec_zone_state(struct zone *, enum zone_stat_item); void refresh_cpu_vm_stats(int); void refresh_zone_stat_thresholds(void); +void drain_zonestat(struct zone *zone, struct per_cpu_pageset *); + int calculate_pressure_threshold(struct zone *zone); int calculate_normal_threshold(struct zone *zone); void set_pgdat_percpu_threshold(pg_data_t *pgdat, @@ -251,8 +253,18 @@ static inline void __dec_zone_page_state(struct page *page, static inline void refresh_cpu_vm_stats(int cpu) { } static inline void refresh_zone_stat_thresholds(void) { } +static inline void drain_zonestat(struct zone *zone, + struct per_cpu_pageset *pset) { } #endif /* CONFIG_SMP */ +static inline void __mod_zone_freepage_state(struct zone *zone, int nr_pages, + int migratetype) +{ + __mod_zone_page_state(zone, NR_FREE_PAGES, nr_pages); + if (is_migrate_cma(migratetype)) + __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, nr_pages); +} + extern const char * const vmstat_text[]; #endif /* _LINUX_VMSTAT_H */ diff --git a/include/trace/events/gfpflags.h b/include/trace/events/gfpflags.h index d6fd8e5b14b7..9391706e9254 100644 --- a/include/trace/events/gfpflags.h +++ b/include/trace/events/gfpflags.h @@ -36,7 +36,6 @@ {(unsigned long)__GFP_RECLAIMABLE, "GFP_RECLAIMABLE"}, \ {(unsigned long)__GFP_MOVABLE, "GFP_MOVABLE"}, \ {(unsigned long)__GFP_NOTRACK, "GFP_NOTRACK"}, \ - {(unsigned long)__GFP_NO_KSWAPD, "GFP_NO_KSWAPD"}, \ {(unsigned long)__GFP_OTHER_NODE, "GFP_OTHER_NODE"} \ ) : "GFP_NOWAIT" diff --git a/init/Kconfig b/init/Kconfig index ed6334dd5e71..4c93533da42c 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1125,10 +1125,12 @@ menuconfig EXPERT environments which can tolerate a "non-standard" kernel. Only use this if you really know what you are doing. +config HAVE_UID16 + bool + config UID16 bool "Enable 16-bit UID system calls" if EXPERT - depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && COMPAT) || UML || (X86_64 && IA32_EMULATION) \ - || AARCH32_EMULATION + depends on HAVE_UID16 default y help This enables the legacy 16-bit UID syscall wrappers. @@ -1150,6 +1152,11 @@ config SYSCTL_SYSCALL If unsure say N here. +config SYSCTL_EXCEPTION_TRACE + bool + help + Enable support for /proc/sys/debug/exception-trace. + config KALLSYMS bool "Load all symbols for debugging/ksymoops" if EXPERT default y diff --git a/init/main.c b/init/main.c index db34c0ec4711..313360fe1118 100644 --- a/init/main.c +++ b/init/main.c @@ -86,7 +86,6 @@ extern void init_IRQ(void); extern void fork_init(unsigned long); extern void mca_init(void); extern void sbus_init(void); -extern void prio_tree_init(void); extern void radix_tree_init(void); #ifndef CONFIG_DEBUG_RODATA static inline void mark_rodata_ro(void) { } @@ -547,7 +546,6 @@ asmlinkage void __init start_kernel(void) /* init some links before init_ISA_irqs() */ early_irq_init(); init_IRQ(); - prio_tree_init(); init_timers(); hrtimers_init(); softirq_init(); diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 6d255e535d03..6b97e2466fad 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -142,7 +142,6 @@ static int msg_insert(struct msg_msg *msg, struct mqueue_inode_info *info) leaf = kmalloc(sizeof(*leaf), GFP_ATOMIC); if (!leaf) return -ENOMEM; - rb_init_node(&leaf->rb_node); INIT_LIST_HEAD(&leaf->msg_list); info->qsize += sizeof(*leaf); } @@ -1013,7 +1012,6 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr, if (!info->node_cache && new_leaf) { /* Save our speculative allocation into the cache */ - rb_init_node(&new_leaf->rb_node); INIT_LIST_HEAD(&new_leaf->msg_list); info->node_cache = new_leaf; info->qsize += sizeof(*new_leaf); @@ -1121,7 +1119,6 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr, if (!info->node_cache && new_leaf) { /* Save our speculative allocation into the cache */ - rb_init_node(&new_leaf->rb_node); INIT_LIST_HEAD(&new_leaf->msg_list); info->node_cache = new_leaf; info->qsize += sizeof(*new_leaf); diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 29e090cc0e46..f4a7756f999c 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -1151,7 +1151,6 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) const struct cred *cred; char name[sizeof(tsk->comm)]; struct mm_struct *mm = tsk->mm; - struct vm_area_struct *vma; char *tty; if (!ab) @@ -1191,16 +1190,8 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) if (mm) { down_read(&mm->mmap_sem); - vma = mm->mmap; - while (vma) { - if ((vma->vm_flags & VM_EXECUTABLE) && - vma->vm_file) { - audit_log_d_path(ab, " exe=", - &vma->vm_file->f_path); - break; - } - vma = vma->vm_next; - } + if (mm->exe_file) + audit_log_d_path(ab, " exe=", &mm->exe_file->f_path); up_read(&mm->mmap_sem); } audit_log_task_context(ab); diff --git a/kernel/cpu.c b/kernel/cpu.c index f560598807c1..42bd331ee0ab 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -80,6 +80,10 @@ void put_online_cpus(void) if (cpu_hotplug.active_writer == current) return; mutex_lock(&cpu_hotplug.lock); + + if (WARN_ON(!cpu_hotplug.refcount)) + cpu_hotplug.refcount++; /* try to fix things up */ + if (!--cpu_hotplug.refcount && unlikely(cpu_hotplug.active_writer)) wake_up_process(cpu_hotplug.active_writer); mutex_unlock(&cpu_hotplug.lock); diff --git a/kernel/events/core.c b/kernel/events/core.c index f16f3c58f11a..cda3ebd49e86 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -3671,7 +3671,7 @@ unlock: atomic_inc(&event->mmap_count); mutex_unlock(&event->mmap_mutex); - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = &perf_mmap_vmops; return ret; diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 912ef48d28ab..98256bc71ee1 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -141,10 +141,14 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr, spinlock_t *ptl; pte_t *ptep; int err; + /* For mmu_notifiers */ + const unsigned long mmun_start = addr; + const unsigned long mmun_end = addr + PAGE_SIZE; /* For try_to_free_swap() and munlock_vma_page() below */ lock_page(page); + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); err = -EAGAIN; ptep = page_check_address(page, mm, addr, &ptl, 0); if (!ptep) @@ -173,6 +177,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr, err = 0; unlock: + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); unlock_page(page); return err; } @@ -735,7 +740,6 @@ static struct map_info * build_map_info(struct address_space *mapping, loff_t offset, bool is_register) { unsigned long pgoff = offset >> PAGE_SHIFT; - struct prio_tree_iter iter; struct vm_area_struct *vma; struct map_info *curr = NULL; struct map_info *prev = NULL; @@ -744,7 +748,7 @@ build_map_info(struct address_space *mapping, loff_t offset, bool is_register) again: mutex_lock(&mapping->i_mmap_mutex); - vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { if (!valid_vma(vma, is_register)) continue; diff --git a/kernel/fork.c b/kernel/fork.c index a2b1efc20928..1cd7d581b3b2 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -423,7 +423,12 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm) mapping->i_mmap_writable++; flush_dcache_mmap_lock(mapping); /* insert tmp into the share list, just after mpnt */ - vma_prio_tree_add(tmp, mpnt); + if (unlikely(tmp->vm_flags & VM_NONLINEAR)) + vma_nonlinear_insert(tmp, + &mapping->i_mmap_nonlinear); + else + vma_interval_tree_insert_after(tmp, mpnt, + &mapping->i_mmap); flush_dcache_mmap_unlock(mapping); mutex_unlock(&mapping->i_mmap_mutex); } @@ -622,26 +627,6 @@ void mmput(struct mm_struct *mm) } EXPORT_SYMBOL_GPL(mmput); -/* - * We added or removed a vma mapping the executable. The vmas are only mapped - * during exec and are not mapped with the mmap system call. - * Callers must hold down_write() on the mm's mmap_sem for these - */ -void added_exe_file_vma(struct mm_struct *mm) -{ - mm->num_exe_file_vmas++; -} - -void removed_exe_file_vma(struct mm_struct *mm) -{ - mm->num_exe_file_vmas--; - if ((mm->num_exe_file_vmas == 0) && mm->exe_file) { - fput(mm->exe_file); - mm->exe_file = NULL; - } - -} - void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file) { if (new_exe_file) @@ -649,15 +634,13 @@ void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file) if (mm->exe_file) fput(mm->exe_file); mm->exe_file = new_exe_file; - mm->num_exe_file_vmas = 0; } struct file *get_mm_exe_file(struct mm_struct *mm) { struct file *exe_file; - /* We need mmap_sem to protect against races with removal of - * VM_EXECUTABLE vmas */ + /* We need mmap_sem to protect against races with removal of exe_file */ down_read(&mm->mmap_sem); exe_file = mm->exe_file; if (exe_file) @@ -1078,7 +1061,6 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) init_rwsem(&sig->group_rwsem); #endif - sig->oom_adj = current->signal->oom_adj; sig->oom_score_adj = current->signal->oom_score_adj; sig->oom_score_adj_min = current->signal->oom_score_adj_min; diff --git a/kernel/sysctl.c b/kernel/sysctl.c index c2a2f8084bad..26f65eaa01f9 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1549,8 +1549,7 @@ static struct ctl_table fs_table[] = { }; static struct ctl_table debug_table[] = { -#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \ - defined(CONFIG_S390) || defined(CONFIG_TILE) || defined(CONFIG_ARM64) +#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE { .procname = "exception-trace", .data = &show_unhandled_signals, diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7fba3a98967f..28e9d6c98941 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -450,12 +450,12 @@ config SLUB_STATS out which slabs are relevant to a particular load. Try running: slabinfo -DA +config HAVE_DEBUG_KMEMLEAK + bool + config DEBUG_KMEMLEAK bool "Kernel memory leak detector" - depends on DEBUG_KERNEL && EXPERIMENTAL && \ - (X86 || ARM || PPC || MIPS || S390 || SPARC64 || SUPERH || \ - MICROBLAZE || TILE || ARM64) - + depends on DEBUG_KERNEL && EXPERIMENTAL && HAVE_DEBUG_KMEMLEAK select DEBUG_FS select STACKTRACE if STACKTRACE_SUPPORT select KALLSYMS @@ -751,12 +751,12 @@ config DEBUG_HIGHMEM This options enables addition error checking for high memory systems. Disable for production systems. +config HAVE_DEBUG_BUGVERBOSE + bool + config DEBUG_BUGVERBOSE bool "Verbose BUG() reporting (adds 70K)" if DEBUG_KERNEL && EXPERT - depends on BUG - depends on ARM || AVR32 || M32R || M68K || SPARC32 || SPARC64 || \ - FRV || SUPERH || GENERIC_BUG || BLACKFIN || MN10300 || \ - TILE || ARM64 + depends on BUG && (GENERIC_BUG || HAVE_DEBUG_BUGVERBOSE) default y help Say Y here to make BUG() panics output the file name and line number @@ -798,6 +798,15 @@ config DEBUG_VM If unsure, say N. +config DEBUG_VM_RB + bool "Debug VM red-black trees" + depends on DEBUG_VM + help + Enable this to turn on more extended checks in the virtual-memory + system that may impact performance. + + If unsure, say N. + config DEBUG_VIRTUAL bool "Debug VM translations" depends on DEBUG_KERNEL && X86 @@ -1282,6 +1291,19 @@ config LATENCYTOP source mm/Kconfig.debug source kernel/trace/Kconfig +config RBTREE_TEST + tristate "Red-Black tree test" + depends on m && DEBUG_KERNEL + help + A benchmark measuring the performance of the rbtree library. + Also includes rbtree invariant checks. + +config INTERVAL_TREE_TEST + tristate "Interval tree test" + depends on m && DEBUG_KERNEL + help + A benchmark measuring the performance of the interval tree library + config PROVIDE_OHCI1394_DMA_INIT bool "Remote debugging over FireWire early on boot" depends on PCI && X86 diff --git a/lib/Makefile b/lib/Makefile index 42d283edc4d3..3128e357e286 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -9,7 +9,7 @@ endif lib-y := ctype.o string.o vsprintf.o cmdline.o \ rbtree.o radix-tree.o dump_stack.o timerqueue.o\ - idr.o int_sqrt.o extable.o prio_tree.o \ + idr.o int_sqrt.o extable.o \ sha1.o md5.o irq_regs.o reciprocal_div.o argv_split.o \ proportions.o flex_proportions.o prio_heap.o ratelimit.o show_mem.o \ is_single_threaded.o plist.o decompress.o @@ -140,6 +140,11 @@ $(foreach file, $(libfdt_files), \ $(eval CFLAGS_$(file) = -I$(src)/../scripts/dtc/libfdt)) lib-$(CONFIG_LIBFDT) += $(libfdt_files) +obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o +obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o + +interval_tree_test-objs := interval_tree_test_main.o interval_tree.o + hostprogs-y := gen_crc32table clean-files := crc32table.h diff --git a/lib/interval_tree.c b/lib/interval_tree.c new file mode 100644 index 000000000000..e6eb406f2d65 --- /dev/null +++ b/lib/interval_tree.c @@ -0,0 +1,10 @@ +#include <linux/init.h> +#include <linux/interval_tree.h> +#include <linux/interval_tree_generic.h> + +#define START(node) ((node)->start) +#define LAST(node) ((node)->last) + +INTERVAL_TREE_DEFINE(struct interval_tree_node, rb, + unsigned long, __subtree_last, + START, LAST,, interval_tree) diff --git a/lib/interval_tree_test_main.c b/lib/interval_tree_test_main.c new file mode 100644 index 000000000000..b25903987f7a --- /dev/null +++ b/lib/interval_tree_test_main.c @@ -0,0 +1,105 @@ +#include <linux/module.h> +#include <linux/interval_tree.h> +#include <linux/random.h> +#include <asm/timex.h> + +#define NODES 100 +#define PERF_LOOPS 100000 +#define SEARCHES 100 +#define SEARCH_LOOPS 10000 + +static struct rb_root root = RB_ROOT; +static struct interval_tree_node nodes[NODES]; +static u32 queries[SEARCHES]; + +static struct rnd_state rnd; + +static inline unsigned long +search(unsigned long query, struct rb_root *root) +{ + struct interval_tree_node *node; + unsigned long results = 0; + + for (node = interval_tree_iter_first(root, query, query); node; + node = interval_tree_iter_next(node, query, query)) + results++; + return results; +} + +static void init(void) +{ + int i; + for (i = 0; i < NODES; i++) { + u32 a = prandom32(&rnd), b = prandom32(&rnd); + if (a <= b) { + nodes[i].start = a; + nodes[i].last = b; + } else { + nodes[i].start = b; + nodes[i].last = a; + } + } + for (i = 0; i < SEARCHES; i++) + queries[i] = prandom32(&rnd); +} + +static int interval_tree_test_init(void) +{ + int i, j; + unsigned long results; + cycles_t time1, time2, time; + + printk(KERN_ALERT "interval tree insert/remove"); + + prandom32_seed(&rnd, 3141592653589793238ULL); + init(); + + time1 = get_cycles(); + + for (i = 0; i < PERF_LOOPS; i++) { + for (j = 0; j < NODES; j++) + interval_tree_insert(nodes + j, &root); + for (j = 0; j < NODES; j++) + interval_tree_remove(nodes + j, &root); + } + + time2 = get_cycles(); + time = time2 - time1; + + time = div_u64(time, PERF_LOOPS); + printk(" -> %llu cycles\n", (unsigned long long)time); + + printk(KERN_ALERT "interval tree search"); + + for (j = 0; j < NODES; j++) + interval_tree_insert(nodes + j, &root); + + time1 = get_cycles(); + + results = 0; + for (i = 0; i < SEARCH_LOOPS; i++) + for (j = 0; j < SEARCHES; j++) + results += search(queries[j], &root); + + time2 = get_cycles(); + time = time2 - time1; + + time = div_u64(time, SEARCH_LOOPS); + results = div_u64(results, SEARCH_LOOPS); + printk(" -> %llu cycles (%lu results)\n", + (unsigned long long)time, results); + + return -EAGAIN; /* Fail will directly unload the module */ +} + +static void interval_tree_test_exit(void) +{ + printk(KERN_ALERT "test exit\n"); +} + +module_init(interval_tree_test_init) +module_exit(interval_tree_test_exit) + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Michel Lespinasse"); +MODULE_DESCRIPTION("Interval Tree test"); diff --git a/lib/prio_tree.c b/lib/prio_tree.c deleted file mode 100644 index 8d443af03b4c..000000000000 --- a/lib/prio_tree.c +++ /dev/null @@ -1,466 +0,0 @@ -/* - * lib/prio_tree.c - priority search tree - * - * Copyright (C) 2004, Rajesh Venkatasubramanian <vrajesh@umich.edu> - * - * This file is released under the GPL v2. - * - * Based on the radix priority search tree proposed by Edward M. McCreight - * SIAM Journal of Computing, vol. 14, no.2, pages 257-276, May 1985 - * - * 02Feb2004 Initial version - */ - -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/prio_tree.h> - -/* - * A clever mix of heap and radix trees forms a radix priority search tree (PST) - * which is useful for storing intervals, e.g, we can consider a vma as a closed - * interval of file pages [offset_begin, offset_end], and store all vmas that - * map a file in a PST. Then, using the PST, we can answer a stabbing query, - * i.e., selecting a set of stored intervals (vmas) that overlap with (map) a - * given input interval X (a set of consecutive file pages), in "O(log n + m)" - * time where 'log n' is the height of the PST, and 'm' is the number of stored - * intervals (vmas) that overlap (map) with the input interval X (the set of - * consecutive file pages). - * - * In our implementation, we store closed intervals of the form [radix_index, - * heap_index]. We assume that always radix_index <= heap_index. McCreight's PST - * is designed for storing intervals with unique radix indices, i.e., each - * interval have different radix_index. However, this limitation can be easily - * overcome by using the size, i.e., heap_index - radix_index, as part of the - * index, so we index the tree using [(radix_index,size), heap_index]. - * - * When the above-mentioned indexing scheme is used, theoretically, in a 32 bit - * machine, the maximum height of a PST can be 64. We can use a balanced version - * of the priority search tree to optimize the tree height, but the balanced - * tree proposed by McCreight is too complex and memory-hungry for our purpose. - */ - -/* - * The following macros are used for implementing prio_tree for i_mmap - */ - -#define RADIX_INDEX(vma) ((vma)->vm_pgoff) -#define VMA_SIZE(vma) (((vma)->vm_end - (vma)->vm_start) >> PAGE_SHIFT) -/* avoid overflow */ -#define HEAP_INDEX(vma) ((vma)->vm_pgoff + (VMA_SIZE(vma) - 1)) - - -static void get_index(const struct prio_tree_root *root, - const struct prio_tree_node *node, - unsigned long *radix, unsigned long *heap) -{ - if (root->raw) { - struct vm_area_struct *vma = prio_tree_entry( - node, struct vm_area_struct, shared.prio_tree_node); - - *radix = RADIX_INDEX(vma); - *heap = HEAP_INDEX(vma); - } - else { - *radix = node->start; - *heap = node->last; - } -} - -static unsigned long index_bits_to_maxindex[BITS_PER_LONG]; - -void __init prio_tree_init(void) -{ - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(index_bits_to_maxindex) - 1; i++) - index_bits_to_maxindex[i] = (1UL << (i + 1)) - 1; - index_bits_to_maxindex[ARRAY_SIZE(index_bits_to_maxindex) - 1] = ~0UL; -} - -/* - * Maximum heap_index that can be stored in a PST with index_bits bits - */ -static inline unsigned long prio_tree_maxindex(unsigned int bits) -{ - return index_bits_to_maxindex[bits - 1]; -} - -static void prio_set_parent(struct prio_tree_node *parent, - struct prio_tree_node *child, bool left) -{ - if (left) - parent->left = child; - else - parent->right = child; - - child->parent = parent; -} - -/* - * Extend a priority search tree so that it can store a node with heap_index - * max_heap_index. In the worst case, this algorithm takes O((log n)^2). - * However, this function is used rarely and the common case performance is - * not bad. - */ -static struct prio_tree_node *prio_tree_expand(struct prio_tree_root *root, - struct prio_tree_node *node, unsigned long max_heap_index) -{ - struct prio_tree_node *prev; - - if (max_heap_index > prio_tree_maxindex(root->index_bits)) - root->index_bits++; - - prev = node; - INIT_PRIO_TREE_NODE(node); - - while (max_heap_index > prio_tree_maxindex(root->index_bits)) { - struct prio_tree_node *tmp = root->prio_tree_node; - - root->index_bits++; - - if (prio_tree_empty(root)) - continue; - - prio_tree_remove(root, root->prio_tree_node); - INIT_PRIO_TREE_NODE(tmp); - - prio_set_parent(prev, tmp, true); - prev = tmp; - } - - if (!prio_tree_empty(root)) - prio_set_parent(prev, root->prio_tree_node, true); - - root->prio_tree_node = node; - return node; -} - -/* - * Replace a prio_tree_node with a new node and return the old node - */ -struct prio_tree_node *prio_tree_replace(struct prio_tree_root *root, - struct prio_tree_node *old, struct prio_tree_node *node) -{ - INIT_PRIO_TREE_NODE(node); - - if (prio_tree_root(old)) { - BUG_ON(root->prio_tree_node != old); - /* - * We can reduce root->index_bits here. However, it is complex - * and does not help much to improve performance (IMO). - */ - root->prio_tree_node = node; - } else - prio_set_parent(old->parent, node, old->parent->left == old); - - if (!prio_tree_left_empty(old)) - prio_set_parent(node, old->left, true); - - if (!prio_tree_right_empty(old)) - prio_set_parent(node, old->right, false); - - return old; -} - -/* - * Insert a prio_tree_node @node into a radix priority search tree @root. The - * algorithm typically takes O(log n) time where 'log n' is the number of bits - * required to represent the maximum heap_index. In the worst case, the algo - * can take O((log n)^2) - check prio_tree_expand. - * - * If a prior node with same radix_index and heap_index is already found in - * the tree, then returns the address of the prior node. Otherwise, inserts - * @node into the tree and returns @node. - */ -struct prio_tree_node *prio_tree_insert(struct prio_tree_root *root, - struct prio_tree_node *node) -{ - struct prio_tree_node *cur, *res = node; - unsigned long radix_index, heap_index; - unsigned long r_index, h_index, index, mask; - int size_flag = 0; - - get_index(root, node, &radix_index, &heap_index); - - if (prio_tree_empty(root) || - heap_index > prio_tree_maxindex(root->index_bits)) - return prio_tree_expand(root, node, heap_index); - - cur = root->prio_tree_node; - mask = 1UL << (root->index_bits - 1); - - while (mask) { - get_index(root, cur, &r_index, &h_index); - - if (r_index == radix_index && h_index == heap_index) - return cur; - - if (h_index < heap_index || - (h_index == heap_index && r_index > radix_index)) { - struct prio_tree_node *tmp = node; - node = prio_tree_replace(root, cur, node); - cur = tmp; - /* swap indices */ - index = r_index; - r_index = radix_index; - radix_index = index; - index = h_index; - h_index = heap_index; - heap_index = index; - } - - if (size_flag) - index = heap_index - radix_index; - else - index = radix_index; - - if (index & mask) { - if (prio_tree_right_empty(cur)) { - INIT_PRIO_TREE_NODE(node); - prio_set_parent(cur, node, false); - return res; - } else - cur = cur->right; - } else { - if (prio_tree_left_empty(cur)) { - INIT_PRIO_TREE_NODE(node); - prio_set_parent(cur, node, true); - return res; - } else - cur = cur->left; - } - - mask >>= 1; - - if (!mask) { - mask = 1UL << (BITS_PER_LONG - 1); - size_flag = 1; - } - } - /* Should not reach here */ - BUG(); - return NULL; -} - -/* - * Remove a prio_tree_node @node from a radix priority search tree @root. The - * algorithm takes O(log n) time where 'log n' is the number of bits required - * to represent the maximum heap_index. - */ -void prio_tree_remove(struct prio_tree_root *root, struct prio_tree_node *node) -{ - struct prio_tree_node *cur; - unsigned long r_index, h_index_right, h_index_left; - - cur = node; - - while (!prio_tree_left_empty(cur) || !prio_tree_right_empty(cur)) { - if (!prio_tree_left_empty(cur)) - get_index(root, cur->left, &r_index, &h_index_left); - else { - cur = cur->right; - continue; - } - - if (!prio_tree_right_empty(cur)) - get_index(root, cur->right, &r_index, &h_index_right); - else { - cur = cur->left; - continue; - } - - /* both h_index_left and h_index_right cannot be 0 */ - if (h_index_left >= h_index_right) - cur = cur->left; - else - cur = cur->right; - } - - if (prio_tree_root(cur)) { - BUG_ON(root->prio_tree_node != cur); - __INIT_PRIO_TREE_ROOT(root, root->raw); - return; - } - - if (cur->parent->right == cur) - cur->parent->right = cur->parent; - else - cur->parent->left = cur->parent; - - while (cur != node) - cur = prio_tree_replace(root, cur->parent, cur); -} - -static void iter_walk_down(struct prio_tree_iter *iter) -{ - iter->mask >>= 1; - if (iter->mask) { - if (iter->size_level) - iter->size_level++; - return; - } - - if (iter->size_level) { - BUG_ON(!prio_tree_left_empty(iter->cur)); - BUG_ON(!prio_tree_right_empty(iter->cur)); - iter->size_level++; - iter->mask = ULONG_MAX; - } else { - iter->size_level = 1; - iter->mask = 1UL << (BITS_PER_LONG - 1); - } -} - -static void iter_walk_up(struct prio_tree_iter *iter) -{ - if (iter->mask == ULONG_MAX) - iter->mask = 1UL; - else if (iter->size_level == 1) - iter->mask = 1UL; - else - iter->mask <<= 1; - if (iter->size_level) - iter->size_level--; - if (!iter->size_level && (iter->value & iter->mask)) - iter->value ^= iter->mask; -} - -/* - * Following functions help to enumerate all prio_tree_nodes in the tree that - * overlap with the input interval X [radix_index, heap_index]. The enumeration - * takes O(log n + m) time where 'log n' is the height of the tree (which is - * proportional to # of bits required to represent the maximum heap_index) and - * 'm' is the number of prio_tree_nodes that overlap the interval X. - */ - -static struct prio_tree_node *prio_tree_left(struct prio_tree_iter *iter, - unsigned long *r_index, unsigned long *h_index) -{ - if (prio_tree_left_empty(iter->cur)) - return NULL; - - get_index(iter->root, iter->cur->left, r_index, h_index); - - if (iter->r_index <= *h_index) { - iter->cur = iter->cur->left; - iter_walk_down(iter); - return iter->cur; - } - - return NULL; -} - -static struct prio_tree_node *prio_tree_right(struct prio_tree_iter *iter, - unsigned long *r_index, unsigned long *h_index) -{ - unsigned long value; - - if (prio_tree_right_empty(iter->cur)) - return NULL; - - if (iter->size_level) - value = iter->value; - else - value = iter->value | iter->mask; - - if (iter->h_index < value) - return NULL; - - get_index(iter->root, iter->cur->right, r_index, h_index); - - if (iter->r_index <= *h_index) { - iter->cur = iter->cur->right; - iter_walk_down(iter); - return iter->cur; - } - - return NULL; -} - -static struct prio_tree_node *prio_tree_parent(struct prio_tree_iter *iter) -{ - iter->cur = iter->cur->parent; - iter_walk_up(iter); - return iter->cur; -} - -static inline int overlap(struct prio_tree_iter *iter, - unsigned long r_index, unsigned long h_index) -{ - return iter->h_index >= r_index && iter->r_index <= h_index; -} - -/* - * prio_tree_first: - * - * Get the first prio_tree_node that overlaps with the interval [radix_index, - * heap_index]. Note that always radix_index <= heap_index. We do a pre-order - * traversal of the tree. - */ -static struct prio_tree_node *prio_tree_first(struct prio_tree_iter *iter) -{ - struct prio_tree_root *root; - unsigned long r_index, h_index; - - INIT_PRIO_TREE_ITER(iter); - - root = iter->root; - if (prio_tree_empty(root)) - return NULL; - - get_index(root, root->prio_tree_node, &r_index, &h_index); - - if (iter->r_index > h_index) - return NULL; - - iter->mask = 1UL << (root->index_bits - 1); - iter->cur = root->prio_tree_node; - - while (1) { - if (overlap(iter, r_index, h_index)) - return iter->cur; - - if (prio_tree_left(iter, &r_index, &h_index)) - continue; - - if (prio_tree_right(iter, &r_index, &h_index)) - continue; - - break; - } - return NULL; -} - -/* - * prio_tree_next: - * - * Get the next prio_tree_node that overlaps with the input interval in iter - */ -struct prio_tree_node *prio_tree_next(struct prio_tree_iter *iter) -{ - unsigned long r_index, h_index; - - if (iter->cur == NULL) - return prio_tree_first(iter); - -repeat: - while (prio_tree_left(iter, &r_index, &h_index)) - if (overlap(iter, r_index, h_index)) - return iter->cur; - - while (!prio_tree_right(iter, &r_index, &h_index)) { - while (!prio_tree_root(iter->cur) && - iter->cur->parent->right == iter->cur) - prio_tree_parent(iter); - - if (prio_tree_root(iter->cur)) - return NULL; - - prio_tree_parent(iter); - } - - if (overlap(iter, r_index, h_index)) - return iter->cur; - - goto repeat; -} diff --git a/lib/rbtree.c b/lib/rbtree.c index d4175565dc2c..4f56a11d67fa 100644 --- a/lib/rbtree.c +++ b/lib/rbtree.c @@ -2,7 +2,8 @@ Red Black Trees (C) 1999 Andrea Arcangeli <andrea@suse.de> (C) 2002 David Woodhouse <dwmw2@infradead.org> - + (C) 2012 Michel Lespinasse <walken@google.com> + This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or @@ -20,339 +21,382 @@ linux/lib/rbtree.c */ -#include <linux/rbtree.h> +#include <linux/rbtree_augmented.h> #include <linux/export.h> -static void __rb_rotate_left(struct rb_node *node, struct rb_root *root) -{ - struct rb_node *right = node->rb_right; - struct rb_node *parent = rb_parent(node); - - if ((node->rb_right = right->rb_left)) - rb_set_parent(right->rb_left, node); - right->rb_left = node; - - rb_set_parent(right, parent); +/* + * red-black trees properties: http://en.wikipedia.org/wiki/Rbtree + * + * 1) A node is either red or black + * 2) The root is black + * 3) All leaves (NULL) are black + * 4) Both children of every red node are black + * 5) Every simple path from root to leaves contains the same number + * of black nodes. + * + * 4 and 5 give the O(log n) guarantee, since 4 implies you cannot have two + * consecutive red nodes in a path and every red node is therefore followed by + * a black. So if B is the number of black nodes on every simple path (as per + * 5), then the longest possible path due to 4 is 2B. + * + * We shall indicate color with case, where black nodes are uppercase and red + * nodes will be lowercase. Unknown color nodes shall be drawn as red within + * parentheses and have some accompanying text comment. + */ - if (parent) - { - if (node == parent->rb_left) - parent->rb_left = right; - else - parent->rb_right = right; - } - else - root->rb_node = right; - rb_set_parent(node, right); +static inline void rb_set_black(struct rb_node *rb) +{ + rb->__rb_parent_color |= RB_BLACK; } -static void __rb_rotate_right(struct rb_node *node, struct rb_root *root) +static inline struct rb_node *rb_red_parent(struct rb_node *red) { - struct rb_node *left = node->rb_left; - struct rb_node *parent = rb_parent(node); - - if ((node->rb_left = left->rb_right)) - rb_set_parent(left->rb_right, node); - left->rb_right = node; - - rb_set_parent(left, parent); + return (struct rb_node *)red->__rb_parent_color; +} - if (parent) - { - if (node == parent->rb_right) - parent->rb_right = left; - else - parent->rb_left = left; - } - else - root->rb_node = left; - rb_set_parent(node, left); +/* + * Helper function for rotations: + * - old's parent and color get assigned to new + * - old gets assigned new as a parent and 'color' as a color. + */ +static inline void +__rb_rotate_set_parents(struct rb_node *old, struct rb_node *new, + struct rb_root *root, int color) +{ + struct rb_node *parent = rb_parent(old); + new->__rb_parent_color = old->__rb_parent_color; + rb_set_parent_color(old, new, color); + __rb_change_child(old, new, parent, root); } -void rb_insert_color(struct rb_node *node, struct rb_root *root) +static __always_inline void +__rb_insert(struct rb_node *node, struct rb_root *root, + void (*augment_rotate)(struct rb_node *old, struct rb_node *new)) { - struct rb_node *parent, *gparent; - - while ((parent = rb_parent(node)) && rb_is_red(parent)) - { - gparent = rb_parent(parent); - - if (parent == gparent->rb_left) - { - { - register struct rb_node *uncle = gparent->rb_right; - if (uncle && rb_is_red(uncle)) - { - rb_set_black(uncle); - rb_set_black(parent); - rb_set_red(gparent); - node = gparent; - continue; - } + struct rb_node *parent = rb_red_parent(node), *gparent, *tmp; + + while (true) { + /* + * Loop invariant: node is red + * + * If there is a black parent, we are done. + * Otherwise, take some corrective action as we don't + * want a red root or two consecutive red nodes. + */ + if (!parent) { + rb_set_parent_color(node, NULL, RB_BLACK); + break; + } else if (rb_is_black(parent)) + break; + + gparent = rb_red_parent(parent); + + tmp = gparent->rb_right; + if (parent != tmp) { /* parent == gparent->rb_left */ + if (tmp && rb_is_red(tmp)) { + /* + * Case 1 - color flips + * + * G g + * / \ / \ + * p u --> P U + * / / + * n N + * + * However, since g's parent might be red, and + * 4) does not allow this, we need to recurse + * at g. + */ + rb_set_parent_color(tmp, gparent, RB_BLACK); + rb_set_parent_color(parent, gparent, RB_BLACK); + node = gparent; + parent = rb_parent(node); + rb_set_parent_color(node, parent, RB_RED); + continue; } - if (parent->rb_right == node) - { - register struct rb_node *tmp; - __rb_rotate_left(parent, root); - tmp = parent; + tmp = parent->rb_right; + if (node == tmp) { + /* + * Case 2 - left rotate at parent + * + * G G + * / \ / \ + * p U --> n U + * \ / + * n p + * + * This still leaves us in violation of 4), the + * continuation into Case 3 will fix that. + */ + parent->rb_right = tmp = node->rb_left; + node->rb_left = parent; + if (tmp) + rb_set_parent_color(tmp, parent, + RB_BLACK); + rb_set_parent_color(parent, node, RB_RED); + augment_rotate(parent, node); parent = node; - node = tmp; + tmp = node->rb_right; } - rb_set_black(parent); - rb_set_red(gparent); - __rb_rotate_right(gparent, root); + /* + * Case 3 - right rotate at gparent + * + * G P + * / \ / \ + * p U --> n g + * / \ + * n U + */ + gparent->rb_left = tmp; /* == parent->rb_right */ + parent->rb_right = gparent; + if (tmp) + rb_set_parent_color(tmp, gparent, RB_BLACK); + __rb_rotate_set_parents(gparent, parent, root, RB_RED); + augment_rotate(gparent, parent); + break; } else { - { - register struct rb_node *uncle = gparent->rb_left; - if (uncle && rb_is_red(uncle)) - { - rb_set_black(uncle); - rb_set_black(parent); - rb_set_red(gparent); - node = gparent; - continue; - } + tmp = gparent->rb_left; + if (tmp && rb_is_red(tmp)) { + /* Case 1 - color flips */ + rb_set_parent_color(tmp, gparent, RB_BLACK); + rb_set_parent_color(parent, gparent, RB_BLACK); + node = gparent; + parent = rb_parent(node); + rb_set_parent_color(node, parent, RB_RED); + continue; } - if (parent->rb_left == node) - { - register struct rb_node *tmp; - __rb_rotate_right(parent, root); - tmp = parent; + tmp = parent->rb_left; + if (node == tmp) { + /* Case 2 - right rotate at parent */ + parent->rb_left = tmp = node->rb_right; + node->rb_right = parent; + if (tmp) + rb_set_parent_color(tmp, parent, + RB_BLACK); + rb_set_parent_color(parent, node, RB_RED); + augment_rotate(parent, node); parent = node; - node = tmp; + tmp = node->rb_left; } - rb_set_black(parent); - rb_set_red(gparent); - __rb_rotate_left(gparent, root); + /* Case 3 - left rotate at gparent */ + gparent->rb_right = tmp; /* == parent->rb_left */ + parent->rb_left = gparent; + if (tmp) + rb_set_parent_color(tmp, gparent, RB_BLACK); + __rb_rotate_set_parents(gparent, parent, root, RB_RED); + augment_rotate(gparent, parent); + break; } } - - rb_set_black(root->rb_node); } -EXPORT_SYMBOL(rb_insert_color); -static void __rb_erase_color(struct rb_node *node, struct rb_node *parent, - struct rb_root *root) +__always_inline void +__rb_erase_color(struct rb_node *parent, struct rb_root *root, + void (*augment_rotate)(struct rb_node *old, struct rb_node *new)) { - struct rb_node *other; - - while ((!node || rb_is_black(node)) && node != root->rb_node) - { - if (parent->rb_left == node) - { - other = parent->rb_right; - if (rb_is_red(other)) - { - rb_set_black(other); - rb_set_red(parent); - __rb_rotate_left(parent, root); - other = parent->rb_right; + struct rb_node *node = NULL, *sibling, *tmp1, *tmp2; + + while (true) { + /* + * Loop invariants: + * - node is black (or NULL on first iteration) + * - node is not the root (parent is not NULL) + * - All leaf paths going through parent and node have a + * black node count that is 1 lower than other leaf paths. + */ + sibling = parent->rb_right; + if (node != sibling) { /* node == parent->rb_left */ + if (rb_is_red(sibling)) { + /* + * Case 1 - left rotate at parent + * + * P S + * / \ / \ + * N s --> p Sr + * / \ / \ + * Sl Sr N Sl + */ + parent->rb_right = tmp1 = sibling->rb_left; + sibling->rb_left = parent; + rb_set_parent_color(tmp1, parent, RB_BLACK); + __rb_rotate_set_parents(parent, sibling, root, + RB_RED); + augment_rotate(parent, sibling); + sibling = tmp1; } - if ((!other->rb_left || rb_is_black(other->rb_left)) && - (!other->rb_right || rb_is_black(other->rb_right))) - { - rb_set_red(other); - node = parent; - parent = rb_parent(node); - } - else - { - if (!other->rb_right || rb_is_black(other->rb_right)) - { - rb_set_black(other->rb_left); - rb_set_red(other); - __rb_rotate_right(other, root); - other = parent->rb_right; + tmp1 = sibling->rb_right; + if (!tmp1 || rb_is_black(tmp1)) { + tmp2 = sibling->rb_left; + if (!tmp2 || rb_is_black(tmp2)) { + /* + * Case 2 - sibling color flip + * (p could be either color here) + * + * (p) (p) + * / \ / \ + * N S --> N s + * / \ / \ + * Sl Sr Sl Sr + * + * This leaves us violating 5) which + * can be fixed by flipping p to black + * if it was red, or by recursing at p. + * p is red when coming from Case 1. + */ + rb_set_parent_color(sibling, parent, + RB_RED); + if (rb_is_red(parent)) + rb_set_black(parent); + else { + node = parent; + parent = rb_parent(node); + if (parent) + continue; + } + break; } - rb_set_color(other, rb_color(parent)); - rb_set_black(parent); - rb_set_black(other->rb_right); - __rb_rotate_left(parent, root); - node = root->rb_node; - break; - } - } - else - { - other = parent->rb_left; - if (rb_is_red(other)) - { - rb_set_black(other); - rb_set_red(parent); - __rb_rotate_right(parent, root); - other = parent->rb_left; + /* + * Case 3 - right rotate at sibling + * (p could be either color here) + * + * (p) (p) + * / \ / \ + * N S --> N Sl + * / \ \ + * sl Sr s + * \ + * Sr + */ + sibling->rb_left = tmp1 = tmp2->rb_right; + tmp2->rb_right = sibling; + parent->rb_right = tmp2; + if (tmp1) + rb_set_parent_color(tmp1, sibling, + RB_BLACK); + augment_rotate(sibling, tmp2); + tmp1 = sibling; + sibling = tmp2; } - if ((!other->rb_left || rb_is_black(other->rb_left)) && - (!other->rb_right || rb_is_black(other->rb_right))) - { - rb_set_red(other); - node = parent; - parent = rb_parent(node); + /* + * Case 4 - left rotate at parent + color flips + * (p and sl could be either color here. + * After rotation, p becomes black, s acquires + * p's color, and sl keeps its color) + * + * (p) (s) + * / \ / \ + * N S --> P Sr + * / \ / \ + * (sl) sr N (sl) + */ + parent->rb_right = tmp2 = sibling->rb_left; + sibling->rb_left = parent; + rb_set_parent_color(tmp1, sibling, RB_BLACK); + if (tmp2) + rb_set_parent(tmp2, parent); + __rb_rotate_set_parents(parent, sibling, root, + RB_BLACK); + augment_rotate(parent, sibling); + break; + } else { + sibling = parent->rb_left; + if (rb_is_red(sibling)) { + /* Case 1 - right rotate at parent */ + parent->rb_left = tmp1 = sibling->rb_right; + sibling->rb_right = parent; + rb_set_parent_color(tmp1, parent, RB_BLACK); + __rb_rotate_set_parents(parent, sibling, root, + RB_RED); + augment_rotate(parent, sibling); + sibling = tmp1; } - else - { - if (!other->rb_left || rb_is_black(other->rb_left)) - { - rb_set_black(other->rb_right); - rb_set_red(other); - __rb_rotate_left(other, root); - other = parent->rb_left; + tmp1 = sibling->rb_left; + if (!tmp1 || rb_is_black(tmp1)) { + tmp2 = sibling->rb_right; + if (!tmp2 || rb_is_black(tmp2)) { + /* Case 2 - sibling color flip */ + rb_set_parent_color(sibling, parent, + RB_RED); + if (rb_is_red(parent)) + rb_set_black(parent); + else { + node = parent; + parent = rb_parent(node); + if (parent) + continue; + } + break; } - rb_set_color(other, rb_color(parent)); - rb_set_black(parent); - rb_set_black(other->rb_left); - __rb_rotate_right(parent, root); - node = root->rb_node; - break; + /* Case 3 - right rotate at sibling */ + sibling->rb_right = tmp1 = tmp2->rb_left; + tmp2->rb_left = sibling; + parent->rb_left = tmp2; + if (tmp1) + rb_set_parent_color(tmp1, sibling, + RB_BLACK); + augment_rotate(sibling, tmp2); + tmp1 = sibling; + sibling = tmp2; } + /* Case 4 - left rotate at parent + color flips */ + parent->rb_left = tmp2 = sibling->rb_right; + sibling->rb_right = parent; + rb_set_parent_color(tmp1, sibling, RB_BLACK); + if (tmp2) + rb_set_parent(tmp2, parent); + __rb_rotate_set_parents(parent, sibling, root, + RB_BLACK); + augment_rotate(parent, sibling); + break; } } - if (node) - rb_set_black(node); } +EXPORT_SYMBOL(__rb_erase_color); -void rb_erase(struct rb_node *node, struct rb_root *root) -{ - struct rb_node *child, *parent; - int color; - - if (!node->rb_left) - child = node->rb_right; - else if (!node->rb_right) - child = node->rb_left; - else - { - struct rb_node *old = node, *left; - - node = node->rb_right; - while ((left = node->rb_left) != NULL) - node = left; - - if (rb_parent(old)) { - if (rb_parent(old)->rb_left == old) - rb_parent(old)->rb_left = node; - else - rb_parent(old)->rb_right = node; - } else - root->rb_node = node; - - child = node->rb_right; - parent = rb_parent(node); - color = rb_color(node); - - if (parent == old) { - parent = node; - } else { - if (child) - rb_set_parent(child, parent); - parent->rb_left = child; - - node->rb_right = old->rb_right; - rb_set_parent(old->rb_right, node); - } - - node->rb_parent_color = old->rb_parent_color; - node->rb_left = old->rb_left; - rb_set_parent(old->rb_left, node); +/* + * Non-augmented rbtree manipulation functions. + * + * We use dummy augmented callbacks here, and have the compiler optimize them + * out of the rb_insert_color() and rb_erase() function definitions. + */ - goto color; - } +static inline void dummy_propagate(struct rb_node *node, struct rb_node *stop) {} +static inline void dummy_copy(struct rb_node *old, struct rb_node *new) {} +static inline void dummy_rotate(struct rb_node *old, struct rb_node *new) {} - parent = rb_parent(node); - color = rb_color(node); - - if (child) - rb_set_parent(child, parent); - if (parent) - { - if (parent->rb_left == node) - parent->rb_left = child; - else - parent->rb_right = child; - } - else - root->rb_node = child; +static const struct rb_augment_callbacks dummy_callbacks = { + dummy_propagate, dummy_copy, dummy_rotate +}; - color: - if (color == RB_BLACK) - __rb_erase_color(child, parent, root); -} -EXPORT_SYMBOL(rb_erase); - -static void rb_augment_path(struct rb_node *node, rb_augment_f func, void *data) +void rb_insert_color(struct rb_node *node, struct rb_root *root) { - struct rb_node *parent; - -up: - func(node, data); - parent = rb_parent(node); - if (!parent) - return; - - if (node == parent->rb_left && parent->rb_right) - func(parent->rb_right, data); - else if (parent->rb_left) - func(parent->rb_left, data); - - node = parent; - goto up; + __rb_insert(node, root, dummy_rotate); } +EXPORT_SYMBOL(rb_insert_color); -/* - * after inserting @node into the tree, update the tree to account for - * both the new entry and any damage done by rebalance - */ -void rb_augment_insert(struct rb_node *node, rb_augment_f func, void *data) +void rb_erase(struct rb_node *node, struct rb_root *root) { - if (node->rb_left) - node = node->rb_left; - else if (node->rb_right) - node = node->rb_right; - - rb_augment_path(node, func, data); + rb_erase_augmented(node, root, &dummy_callbacks); } -EXPORT_SYMBOL(rb_augment_insert); +EXPORT_SYMBOL(rb_erase); /* - * before removing the node, find the deepest node on the rebalance path - * that will still be there after @node gets removed + * Augmented rbtree manipulation functions. + * + * This instantiates the same __always_inline functions as in the non-augmented + * case, but this time with user-defined callbacks. */ -struct rb_node *rb_augment_erase_begin(struct rb_node *node) -{ - struct rb_node *deepest; - - if (!node->rb_right && !node->rb_left) - deepest = rb_parent(node); - else if (!node->rb_right) - deepest = node->rb_left; - else if (!node->rb_left) - deepest = node->rb_right; - else { - deepest = rb_next(node); - if (deepest->rb_right) - deepest = deepest->rb_right; - else if (rb_parent(deepest) != node) - deepest = rb_parent(deepest); - } - - return deepest; -} -EXPORT_SYMBOL(rb_augment_erase_begin); -/* - * after removal, update the tree to account for the removed entry - * and any rebalance damage. - */ -void rb_augment_erase_end(struct rb_node *node, rb_augment_f func, void *data) +void __rb_insert_augmented(struct rb_node *node, struct rb_root *root, + void (*augment_rotate)(struct rb_node *old, struct rb_node *new)) { - if (node) - rb_augment_path(node, func, data); + __rb_insert(node, root, augment_rotate); } -EXPORT_SYMBOL(rb_augment_erase_end); +EXPORT_SYMBOL(__rb_insert_augmented); /* * This function returns the first node (in sort order) of the tree. @@ -387,11 +431,13 @@ struct rb_node *rb_next(const struct rb_node *node) { struct rb_node *parent; - if (rb_parent(node) == node) + if (RB_EMPTY_NODE(node)) return NULL; - /* If we have a right-hand child, go down and then left as far - as we can. */ + /* + * If we have a right-hand child, go down and then left as far + * as we can. + */ if (node->rb_right) { node = node->rb_right; while (node->rb_left) @@ -399,12 +445,13 @@ struct rb_node *rb_next(const struct rb_node *node) return (struct rb_node *)node; } - /* No right-hand children. Everything down and left is - smaller than us, so any 'next' node must be in the general - direction of our parent. Go up the tree; any time the - ancestor is a right-hand child of its parent, keep going - up. First time it's a left-hand child of its parent, said - parent is our 'next' node. */ + /* + * No right-hand children. Everything down and left is smaller than us, + * so any 'next' node must be in the general direction of our parent. + * Go up the tree; any time the ancestor is a right-hand child of its + * parent, keep going up. First time it's a left-hand child of its + * parent, said parent is our 'next' node. + */ while ((parent = rb_parent(node)) && node == parent->rb_right) node = parent; @@ -416,11 +463,13 @@ struct rb_node *rb_prev(const struct rb_node *node) { struct rb_node *parent; - if (rb_parent(node) == node) + if (RB_EMPTY_NODE(node)) return NULL; - /* If we have a left-hand child, go down and then right as far - as we can. */ + /* + * If we have a left-hand child, go down and then right as far + * as we can. + */ if (node->rb_left) { node = node->rb_left; while (node->rb_right) @@ -428,8 +477,10 @@ struct rb_node *rb_prev(const struct rb_node *node) return (struct rb_node *)node; } - /* No left-hand children. Go up till we find an ancestor which - is a right-hand child of its parent */ + /* + * No left-hand children. Go up till we find an ancestor which + * is a right-hand child of its parent. + */ while ((parent = rb_parent(node)) && node == parent->rb_left) node = parent; @@ -443,14 +494,7 @@ void rb_replace_node(struct rb_node *victim, struct rb_node *new, struct rb_node *parent = rb_parent(victim); /* Set the surrounding nodes to point to the replacement */ - if (parent) { - if (victim == parent->rb_left) - parent->rb_left = new; - else - parent->rb_right = new; - } else { - root->rb_node = new; - } + __rb_change_child(victim, new, parent, root); if (victim->rb_left) rb_set_parent(victim->rb_left, new); if (victim->rb_right) diff --git a/lib/rbtree_test.c b/lib/rbtree_test.c new file mode 100644 index 000000000000..268b23951fec --- /dev/null +++ b/lib/rbtree_test.c @@ -0,0 +1,234 @@ +#include <linux/module.h> +#include <linux/rbtree_augmented.h> +#include <linux/random.h> +#include <asm/timex.h> + +#define NODES 100 +#define PERF_LOOPS 100000 +#define CHECK_LOOPS 100 + +struct test_node { + struct rb_node rb; + u32 key; + + /* following fields used for testing augmented rbtree functionality */ + u32 val; + u32 augmented; +}; + +static struct rb_root root = RB_ROOT; +static struct test_node nodes[NODES]; + +static struct rnd_state rnd; + +static void insert(struct test_node *node, struct rb_root *root) +{ + struct rb_node **new = &root->rb_node, *parent = NULL; + u32 key = node->key; + + while (*new) { + parent = *new; + if (key < rb_entry(parent, struct test_node, rb)->key) + new = &parent->rb_left; + else + new = &parent->rb_right; + } + + rb_link_node(&node->rb, parent, new); + rb_insert_color(&node->rb, root); +} + +static inline void erase(struct test_node *node, struct rb_root *root) +{ + rb_erase(&node->rb, root); +} + +static inline u32 augment_recompute(struct test_node *node) +{ + u32 max = node->val, child_augmented; + if (node->rb.rb_left) { + child_augmented = rb_entry(node->rb.rb_left, struct test_node, + rb)->augmented; + if (max < child_augmented) + max = child_augmented; + } + if (node->rb.rb_right) { + child_augmented = rb_entry(node->rb.rb_right, struct test_node, + rb)->augmented; + if (max < child_augmented) + max = child_augmented; + } + return max; +} + +RB_DECLARE_CALLBACKS(static, augment_callbacks, struct test_node, rb, + u32, augmented, augment_recompute) + +static void insert_augmented(struct test_node *node, struct rb_root *root) +{ + struct rb_node **new = &root->rb_node, *rb_parent = NULL; + u32 key = node->key; + u32 val = node->val; + struct test_node *parent; + + while (*new) { + rb_parent = *new; + parent = rb_entry(rb_parent, struct test_node, rb); + if (parent->augmented < val) + parent->augmented = val; + if (key < parent->key) + new = &parent->rb.rb_left; + else + new = &parent->rb.rb_right; + } + + node->augmented = val; + rb_link_node(&node->rb, rb_parent, new); + rb_insert_augmented(&node->rb, root, &augment_callbacks); +} + +static void erase_augmented(struct test_node *node, struct rb_root *root) +{ + rb_erase_augmented(&node->rb, root, &augment_callbacks); +} + +static void init(void) +{ + int i; + for (i = 0; i < NODES; i++) { + nodes[i].key = prandom32(&rnd); + nodes[i].val = prandom32(&rnd); + } +} + +static bool is_red(struct rb_node *rb) +{ + return !(rb->__rb_parent_color & 1); +} + +static int black_path_count(struct rb_node *rb) +{ + int count; + for (count = 0; rb; rb = rb_parent(rb)) + count += !is_red(rb); + return count; +} + +static void check(int nr_nodes) +{ + struct rb_node *rb; + int count = 0; + int blacks; + u32 prev_key = 0; + + for (rb = rb_first(&root); rb; rb = rb_next(rb)) { + struct test_node *node = rb_entry(rb, struct test_node, rb); + WARN_ON_ONCE(node->key < prev_key); + WARN_ON_ONCE(is_red(rb) && + (!rb_parent(rb) || is_red(rb_parent(rb)))); + if (!count) + blacks = black_path_count(rb); + else + WARN_ON_ONCE((!rb->rb_left || !rb->rb_right) && + blacks != black_path_count(rb)); + prev_key = node->key; + count++; + } + WARN_ON_ONCE(count != nr_nodes); +} + +static void check_augmented(int nr_nodes) +{ + struct rb_node *rb; + + check(nr_nodes); + for (rb = rb_first(&root); rb; rb = rb_next(rb)) { + struct test_node *node = rb_entry(rb, struct test_node, rb); + WARN_ON_ONCE(node->augmented != augment_recompute(node)); + } +} + +static int rbtree_test_init(void) +{ + int i, j; + cycles_t time1, time2, time; + + printk(KERN_ALERT "rbtree testing"); + + prandom32_seed(&rnd, 3141592653589793238ULL); + init(); + + time1 = get_cycles(); + + for (i = 0; i < PERF_LOOPS; i++) { + for (j = 0; j < NODES; j++) + insert(nodes + j, &root); + for (j = 0; j < NODES; j++) + erase(nodes + j, &root); + } + + time2 = get_cycles(); + time = time2 - time1; + + time = div_u64(time, PERF_LOOPS); + printk(" -> %llu cycles\n", (unsigned long long)time); + + for (i = 0; i < CHECK_LOOPS; i++) { + init(); + for (j = 0; j < NODES; j++) { + check(j); + insert(nodes + j, &root); + } + for (j = 0; j < NODES; j++) { + check(NODES - j); + erase(nodes + j, &root); + } + check(0); + } + + printk(KERN_ALERT "augmented rbtree testing"); + + init(); + + time1 = get_cycles(); + + for (i = 0; i < PERF_LOOPS; i++) { + for (j = 0; j < NODES; j++) + insert_augmented(nodes + j, &root); + for (j = 0; j < NODES; j++) + erase_augmented(nodes + j, &root); + } + + time2 = get_cycles(); + time = time2 - time1; + + time = div_u64(time, PERF_LOOPS); + printk(" -> %llu cycles\n", (unsigned long long)time); + + for (i = 0; i < CHECK_LOOPS; i++) { + init(); + for (j = 0; j < NODES; j++) { + check_augmented(j); + insert_augmented(nodes + j, &root); + } + for (j = 0; j < NODES; j++) { + check_augmented(NODES - j); + erase_augmented(nodes + j, &root); + } + check_augmented(0); + } + + return -EAGAIN; /* Fail will directly unload the module */ +} + +static void rbtree_test_exit(void) +{ + printk(KERN_ALERT "test exit\n"); +} + +module_init(rbtree_test_init) +module_exit(rbtree_test_exit) + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Michel Lespinasse"); +MODULE_DESCRIPTION("Red Black Tree test"); diff --git a/mm/Kconfig b/mm/Kconfig index d5c8019c6627..a3f8dddaaab3 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -191,6 +191,7 @@ config SPLIT_PTLOCK_CPUS # support for memory compaction config COMPACTION bool "Allow for memory compaction" + def_bool y select MIGRATION depends on MMU help @@ -318,7 +319,7 @@ config NOMMU_INITIAL_TRIM_EXCESS config TRANSPARENT_HUGEPAGE bool "Transparent Hugepage Support" - depends on X86 && MMU + depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE select COMPACTION help Transparent Hugepages allows the kernel to use huge pages and diff --git a/mm/Makefile b/mm/Makefile index 92753e2d82da..6b025f80af34 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -14,9 +14,9 @@ endif obj-y := filemap.o mempool.o oom_kill.o fadvise.o \ maccess.o page_alloc.o page-writeback.o \ readahead.o swap.o truncate.o vmscan.o shmem.o \ - prio_tree.o util.o mmzone.o vmstat.o backing-dev.o \ + util.o mmzone.o vmstat.o backing-dev.o \ mm_init.o mmu_context.o percpu.o slab_common.o \ - compaction.o $(mmu-y) + compaction.o interval_tree.o $(mmu-y) obj-y += init-mm.o diff --git a/mm/bootmem.c b/mm/bootmem.c index f468185b3b28..434be4ae7a04 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -198,6 +198,8 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata) int order = ilog2(BITS_PER_LONG); __free_pages_bootmem(pfn_to_page(start), order); + fixup_zone_present_pages(page_to_nid(pfn_to_page(start)), + start, start + BITS_PER_LONG); count += BITS_PER_LONG; start += BITS_PER_LONG; } else { @@ -208,6 +210,9 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata) if (vec & 1) { page = pfn_to_page(start + off); __free_pages_bootmem(page, 0); + fixup_zone_present_pages( + page_to_nid(page), + start + off, start + off + 1); count++; } vec >>= 1; @@ -221,8 +226,11 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata) pages = bdata->node_low_pfn - bdata->node_min_pfn; pages = bootmem_bootmap_pages(pages); count += pages; - while (pages--) + while (pages--) { + fixup_zone_present_pages(page_to_nid(page), + page_to_pfn(page), page_to_pfn(page) + 1); __free_pages_bootmem(page++, 0); + } bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count); diff --git a/mm/compaction.c b/mm/compaction.c index 7fcd3a52e68d..2c4ce17651d8 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -50,6 +50,111 @@ static inline bool migrate_async_suitable(int migratetype) return is_migrate_cma(migratetype) || migratetype == MIGRATE_MOVABLE; } +#ifdef CONFIG_COMPACTION +/* Returns true if the pageblock should be scanned for pages to isolate. */ +static inline bool isolation_suitable(struct compact_control *cc, + struct page *page) +{ + if (cc->ignore_skip_hint) + return true; + + return !get_pageblock_skip(page); +} + +/* + * This function is called to clear all cached information on pageblocks that + * should be skipped for page isolation when the migrate and free page scanner + * meet. + */ +static void __reset_isolation_suitable(struct zone *zone) +{ + unsigned long start_pfn = zone->zone_start_pfn; + unsigned long end_pfn = zone->zone_start_pfn + zone->spanned_pages; + unsigned long pfn; + + zone->compact_cached_migrate_pfn = start_pfn; + zone->compact_cached_free_pfn = end_pfn; + zone->compact_blockskip_flush = false; + + /* Walk the zone and mark every pageblock as suitable for isolation */ + for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) { + struct page *page; + + cond_resched(); + + if (!pfn_valid(pfn)) + continue; + + page = pfn_to_page(pfn); + if (zone != page_zone(page)) + continue; + + clear_pageblock_skip(page); + } +} + +void reset_isolation_suitable(pg_data_t *pgdat) +{ + int zoneid; + + for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) { + struct zone *zone = &pgdat->node_zones[zoneid]; + if (!populated_zone(zone)) + continue; + + /* Only flush if a full compaction finished recently */ + if (zone->compact_blockskip_flush) + __reset_isolation_suitable(zone); + } +} + +/* + * If no pages were isolated then mark this pageblock to be skipped in the + * future. The information is later cleared by __reset_isolation_suitable(). + */ +static void update_pageblock_skip(struct compact_control *cc, + struct page *page, unsigned long nr_isolated, + bool migrate_scanner) +{ + struct zone *zone = cc->zone; + if (!page) + return; + + if (!nr_isolated) { + unsigned long pfn = page_to_pfn(page); + set_pageblock_skip(page); + + /* Update where compaction should restart */ + if (migrate_scanner) { + if (!cc->finished_update_migrate && + pfn > zone->compact_cached_migrate_pfn) + zone->compact_cached_migrate_pfn = pfn; + } else { + if (!cc->finished_update_free && + pfn < zone->compact_cached_free_pfn) + zone->compact_cached_free_pfn = pfn; + } + } +} +#else +static inline bool isolation_suitable(struct compact_control *cc, + struct page *page) +{ + return true; +} + +static void update_pageblock_skip(struct compact_control *cc, + struct page *page, unsigned long nr_isolated, + bool migrate_scanner) +{ +} +#endif /* CONFIG_COMPACTION */ + +static inline bool should_release_lock(spinlock_t *lock) +{ + return need_resched() || spin_is_contended(lock); +} + /* * Compaction requires the taking of some coarse locks that are potentially * very heavily contended. Check if the process needs to be scheduled or @@ -62,7 +167,7 @@ static inline bool migrate_async_suitable(int migratetype) static bool compact_checklock_irqsave(spinlock_t *lock, unsigned long *flags, bool locked, struct compact_control *cc) { - if (need_resched() || spin_is_contended(lock)) { + if (should_release_lock(lock)) { if (locked) { spin_unlock_irqrestore(lock, *flags); locked = false; @@ -70,14 +175,11 @@ static bool compact_checklock_irqsave(spinlock_t *lock, unsigned long *flags, /* async aborts if taking too long or contended */ if (!cc->sync) { - if (cc->contended) - *cc->contended = true; + cc->contended = true; return false; } cond_resched(); - if (fatal_signal_pending(current)) - return false; } if (!locked) @@ -91,44 +193,139 @@ static inline bool compact_trylock_irqsave(spinlock_t *lock, return compact_checklock_irqsave(lock, flags, false, cc); } +/* Returns true if the page is within a block suitable for migration to */ +static bool suitable_migration_target(struct page *page) +{ + int migratetype = get_pageblock_migratetype(page); + + /* Don't interfere with memory hot-remove or the min_free_kbytes blocks */ + if (migratetype == MIGRATE_ISOLATE || migratetype == MIGRATE_RESERVE) + return false; + + /* If the page is a large free page, then allow migration */ + if (PageBuddy(page) && page_order(page) >= pageblock_order) + return true; + + /* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */ + if (migrate_async_suitable(migratetype)) + return true; + + /* Otherwise skip the block */ + return false; +} + +static void compact_capture_page(struct compact_control *cc) +{ + unsigned long flags; + int mtype, mtype_low, mtype_high; + + if (!cc->page || *cc->page) + return; + + /* + * For MIGRATE_MOVABLE allocations we capture a suitable page ASAP + * regardless of the migratetype of the freelist is is captured from. + * This is fine because the order for a high-order MIGRATE_MOVABLE + * allocation is typically at least a pageblock size and overall + * fragmentation is not impaired. Other allocation types must + * capture pages from their own migratelist because otherwise they + * could pollute other pageblocks like MIGRATE_MOVABLE with + * difficult to move pages and making fragmentation worse overall. + */ + if (cc->migratetype == MIGRATE_MOVABLE) { + mtype_low = 0; + mtype_high = MIGRATE_PCPTYPES; + } else { + mtype_low = cc->migratetype; + mtype_high = cc->migratetype + 1; + } + + /* Speculatively examine the free lists without zone lock */ + for (mtype = mtype_low; mtype < mtype_high; mtype++) { + int order; + for (order = cc->order; order < MAX_ORDER; order++) { + struct page *page; + struct free_area *area; + area = &(cc->zone->free_area[order]); + if (list_empty(&area->free_list[mtype])) + continue; + + /* Take the lock and attempt capture of the page */ + if (!compact_trylock_irqsave(&cc->zone->lock, &flags, cc)) + return; + if (!list_empty(&area->free_list[mtype])) { + page = list_entry(area->free_list[mtype].next, + struct page, lru); + if (capture_free_page(page, cc->order, mtype)) { + spin_unlock_irqrestore(&cc->zone->lock, + flags); + *cc->page = page; + return; + } + } + spin_unlock_irqrestore(&cc->zone->lock, flags); + } + } +} + /* * Isolate free pages onto a private freelist. Caller must hold zone->lock. * If @strict is true, will abort returning 0 on any invalid PFNs or non-free * pages inside of the pageblock (even though it may still end up isolating * some pages). */ -static unsigned long isolate_freepages_block(unsigned long blockpfn, +static unsigned long isolate_freepages_block(struct compact_control *cc, + unsigned long blockpfn, unsigned long end_pfn, struct list_head *freelist, bool strict) { int nr_scanned = 0, total_isolated = 0; - struct page *cursor; + struct page *cursor, *valid_page = NULL; + unsigned long nr_strict_required = end_pfn - blockpfn; + unsigned long flags; + bool locked = false; cursor = pfn_to_page(blockpfn); - /* Isolate free pages. This assumes the block is valid */ + /* Isolate free pages. */ for (; blockpfn < end_pfn; blockpfn++, cursor++) { int isolated, i; struct page *page = cursor; - if (!pfn_valid_within(blockpfn)) { - if (strict) - return 0; - continue; - } nr_scanned++; + if (!pfn_valid_within(blockpfn)) + continue; + if (!valid_page) + valid_page = page; + if (!PageBuddy(page)) + continue; - if (!PageBuddy(page)) { - if (strict) - return 0; + /* + * The zone lock must be held to isolate freepages. + * Unfortunately this is a very coarse lock and can be + * heavily contended if there are parallel allocations + * or parallel compactions. For async compaction do not + * spin on the lock and we acquire the lock as late as + * possible. + */ + locked = compact_checklock_irqsave(&cc->zone->lock, &flags, + locked, cc); + if (!locked) + break; + + /* Recheck this is a suitable migration target under lock */ + if (!strict && !suitable_migration_target(page)) + break; + + /* Recheck this is a buddy page under lock */ + if (!PageBuddy(page)) continue; - } /* Found a free page, break it into order-0 pages */ isolated = split_free_page(page); if (!isolated && strict) - return 0; + break; total_isolated += isolated; for (i = 0; i < isolated; i++) { list_add(&page->lru, freelist); @@ -143,6 +340,22 @@ static unsigned long isolate_freepages_block(unsigned long blockpfn, } trace_mm_compaction_isolate_freepages(nr_scanned, total_isolated); + + /* + * If strict isolation is requested by CMA then check that all the + * pages requested were isolated. If there were any failures, 0 is + * returned and CMA will fail. + */ + if (strict && nr_strict_required != total_isolated) + total_isolated = 0; + + if (locked) + spin_unlock_irqrestore(&cc->zone->lock, flags); + + /* Update the pageblock-skip if the whole pageblock was scanned */ + if (blockpfn == end_pfn) + update_pageblock_skip(cc, valid_page, total_isolated, false); + return total_isolated; } @@ -160,17 +373,14 @@ static unsigned long isolate_freepages_block(unsigned long blockpfn, * a free page). */ unsigned long -isolate_freepages_range(unsigned long start_pfn, unsigned long end_pfn) +isolate_freepages_range(struct compact_control *cc, + unsigned long start_pfn, unsigned long end_pfn) { - unsigned long isolated, pfn, block_end_pfn, flags; - struct zone *zone = NULL; + unsigned long isolated, pfn, block_end_pfn; LIST_HEAD(freelist); - if (pfn_valid(start_pfn)) - zone = page_zone(pfn_to_page(start_pfn)); - for (pfn = start_pfn; pfn < end_pfn; pfn += isolated) { - if (!pfn_valid(pfn) || zone != page_zone(pfn_to_page(pfn))) + if (!pfn_valid(pfn) || cc->zone != page_zone(pfn_to_page(pfn))) break; /* @@ -180,10 +390,8 @@ isolate_freepages_range(unsigned long start_pfn, unsigned long end_pfn) block_end_pfn = ALIGN(pfn + 1, pageblock_nr_pages); block_end_pfn = min(block_end_pfn, end_pfn); - spin_lock_irqsave(&zone->lock, flags); - isolated = isolate_freepages_block(pfn, block_end_pfn, + isolated = isolate_freepages_block(cc, pfn, block_end_pfn, &freelist, true); - spin_unlock_irqrestore(&zone->lock, flags); /* * In strict mode, isolate_freepages_block() returns 0 if @@ -253,6 +461,7 @@ static bool too_many_isolated(struct zone *zone) * @cc: Compaction control structure. * @low_pfn: The first PFN of the range. * @end_pfn: The one-past-the-last PFN of the range. + * @unevictable: true if it allows to isolate unevictable pages * * Isolate all pages that can be migrated from the range specified by * [low_pfn, end_pfn). Returns zero if there is a fatal signal @@ -268,7 +477,7 @@ static bool too_many_isolated(struct zone *zone) */ unsigned long isolate_migratepages_range(struct zone *zone, struct compact_control *cc, - unsigned long low_pfn, unsigned long end_pfn) + unsigned long low_pfn, unsigned long end_pfn, bool unevictable) { unsigned long last_pageblock_nr = 0, pageblock_nr; unsigned long nr_scanned = 0, nr_isolated = 0; @@ -276,7 +485,8 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, isolate_mode_t mode = 0; struct lruvec *lruvec; unsigned long flags; - bool locked; + bool locked = false; + struct page *page = NULL, *valid_page = NULL; /* * Ensure that there are not too many pages isolated from the LRU @@ -296,23 +506,15 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, /* Time to isolate some pages for migration */ cond_resched(); - spin_lock_irqsave(&zone->lru_lock, flags); - locked = true; for (; low_pfn < end_pfn; low_pfn++) { - struct page *page; - /* give a chance to irqs before checking need_resched() */ - if (!((low_pfn+1) % SWAP_CLUSTER_MAX)) { - spin_unlock_irqrestore(&zone->lru_lock, flags); - locked = false; + if (locked && !((low_pfn+1) % SWAP_CLUSTER_MAX)) { + if (should_release_lock(&zone->lru_lock)) { + spin_unlock_irqrestore(&zone->lru_lock, flags); + locked = false; + } } - /* Check if it is ok to still hold the lock */ - locked = compact_checklock_irqsave(&zone->lru_lock, &flags, - locked, cc); - if (!locked) - break; - /* * migrate_pfn does not necessarily start aligned to a * pageblock. Ensure that pfn_valid is called when moving @@ -340,6 +542,14 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, if (page_zone(page) != zone) continue; + if (!valid_page) + valid_page = page; + + /* If isolation recently failed, do not retry */ + pageblock_nr = low_pfn >> pageblock_order; + if (!isolation_suitable(cc, page)) + goto next_pageblock; + /* Skip if free */ if (PageBuddy(page)) continue; @@ -349,24 +559,43 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, * migration is optimistic to see if the minimum amount of work * satisfies the allocation */ - pageblock_nr = low_pfn >> pageblock_order; if (!cc->sync && last_pageblock_nr != pageblock_nr && !migrate_async_suitable(get_pageblock_migratetype(page))) { - low_pfn += pageblock_nr_pages; - low_pfn = ALIGN(low_pfn, pageblock_nr_pages) - 1; - last_pageblock_nr = pageblock_nr; - continue; + cc->finished_update_migrate = true; + goto next_pageblock; } + /* Check may be lockless but that's ok as we recheck later */ if (!PageLRU(page)) continue; /* - * PageLRU is set, and lru_lock excludes isolation, - * splitting and collapsing (collapsing has already - * happened if PageLRU is set). + * PageLRU is set. lru_lock normally excludes isolation + * splitting and collapsing (collapsing has already happened + * if PageLRU is set) but the lock is not necessarily taken + * here and it is wasteful to take it just to check transhuge. + * Check TransHuge without lock and skip the whole pageblock if + * it's either a transhuge or hugetlbfs page, as calling + * compound_order() without preventing THP from splitting the + * page underneath us may return surprising results. */ if (PageTransHuge(page)) { + if (!locked) + goto next_pageblock; + low_pfn += (1 << compound_order(page)) - 1; + continue; + } + + /* Check if it is ok to still hold the lock */ + locked = compact_checklock_irqsave(&zone->lru_lock, &flags, + locked, cc); + if (!locked || fatal_signal_pending(current)) + break; + + /* Recheck PageLRU and PageTransHuge under lock */ + if (!PageLRU(page)) + continue; + if (PageTransHuge(page)) { low_pfn += (1 << compound_order(page)) - 1; continue; } @@ -374,6 +603,9 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, if (!cc->sync) mode |= ISOLATE_ASYNC_MIGRATE; + if (unevictable) + mode |= ISOLATE_UNEVICTABLE; + lruvec = mem_cgroup_page_lruvec(page, zone); /* Try isolate the page */ @@ -383,6 +615,7 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, VM_BUG_ON(PageTransCompound(page)); /* Successfully isolated */ + cc->finished_update_migrate = true; del_page_from_lru_list(page, lruvec, page_lru(page)); list_add(&page->lru, migratelist); cc->nr_migratepages++; @@ -393,6 +626,13 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, ++low_pfn; break; } + + continue; + +next_pageblock: + low_pfn += pageblock_nr_pages; + low_pfn = ALIGN(low_pfn, pageblock_nr_pages) - 1; + last_pageblock_nr = pageblock_nr; } acct_isolated(zone, locked, cc); @@ -400,6 +640,10 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, if (locked) spin_unlock_irqrestore(&zone->lru_lock, flags); + /* Update the pageblock-skip if the whole pageblock was scanned */ + if (low_pfn == end_pfn) + update_pageblock_skip(cc, valid_page, nr_isolated, true); + trace_mm_compaction_isolate_migratepages(nr_scanned, nr_isolated); return low_pfn; @@ -407,43 +651,6 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc, #endif /* CONFIG_COMPACTION || CONFIG_CMA */ #ifdef CONFIG_COMPACTION - -/* Returns true if the page is within a block suitable for migration to */ -static bool suitable_migration_target(struct page *page) -{ - - int migratetype = get_pageblock_migratetype(page); - - /* Don't interfere with memory hot-remove or the min_free_kbytes blocks */ - if (migratetype == MIGRATE_ISOLATE || migratetype == MIGRATE_RESERVE) - return false; - - /* If the page is a large free page, then allow migration */ - if (PageBuddy(page) && page_order(page) >= pageblock_order) - return true; - - /* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */ - if (migrate_async_suitable(migratetype)) - return true; - - /* Otherwise skip the block */ - return false; -} - -/* - * Returns the start pfn of the last page block in a zone. This is the starting - * point for full compaction of a zone. Compaction searches for free pages from - * the end of each zone, while isolate_freepages_block scans forward inside each - * page block. - */ -static unsigned long start_free_pfn(struct zone *zone) -{ - unsigned long free_pfn; - free_pfn = zone->zone_start_pfn + zone->spanned_pages; - free_pfn &= ~(pageblock_nr_pages-1); - return free_pfn; -} - /* * Based on information in the current compact_control, find blocks * suitable for isolating free pages from and then isolate them. @@ -453,7 +660,6 @@ static void isolate_freepages(struct zone *zone, { struct page *page; unsigned long high_pfn, low_pfn, pfn, zone_end_pfn, end_pfn; - unsigned long flags; int nr_freepages = cc->nr_freepages; struct list_head *freelist = &cc->freepages; @@ -501,30 +707,16 @@ static void isolate_freepages(struct zone *zone, if (!suitable_migration_target(page)) continue; - /* - * Found a block suitable for isolating free pages from. Now - * we disabled interrupts, double check things are ok and - * isolate the pages. This is to minimise the time IRQs - * are disabled - */ - isolated = 0; + /* If isolation recently failed, do not retry */ + if (!isolation_suitable(cc, page)) + continue; - /* - * The zone lock must be held to isolate freepages. This - * unfortunately this is a very coarse lock and can be - * heavily contended if there are parallel allocations - * or parallel compactions. For async compaction do not - * spin on the lock - */ - if (!compact_trylock_irqsave(&zone->lock, &flags, cc)) - break; - if (suitable_migration_target(page)) { - end_pfn = min(pfn + pageblock_nr_pages, zone_end_pfn); - isolated = isolate_freepages_block(pfn, end_pfn, - freelist, false); - nr_freepages += isolated; - } - spin_unlock_irqrestore(&zone->lock, flags); + /* Found a block suitable for isolating free pages from */ + isolated = 0; + end_pfn = min(pfn + pageblock_nr_pages, zone_end_pfn); + isolated = isolate_freepages_block(cc, pfn, end_pfn, + freelist, false); + nr_freepages += isolated; /* * Record the highest PFN we isolated pages from. When next @@ -532,17 +724,8 @@ static void isolate_freepages(struct zone *zone, * page migration may have returned some pages to the allocator */ if (isolated) { + cc->finished_update_free = true; high_pfn = max(high_pfn, pfn); - - /* - * If the free scanner has wrapped, update - * compact_cached_free_pfn to point to the highest - * pageblock with free pages. This reduces excessive - * scanning of full pageblocks near the end of the - * zone - */ - if (cc->order > 0 && cc->wrapped) - zone->compact_cached_free_pfn = high_pfn; } } @@ -551,11 +734,6 @@ static void isolate_freepages(struct zone *zone, cc->free_pfn = high_pfn; cc->nr_freepages = nr_freepages; - - /* If compact_cached_free_pfn is reset then set it now */ - if (cc->order > 0 && !cc->wrapped && - zone->compact_cached_free_pfn == start_free_pfn(zone)) - zone->compact_cached_free_pfn = high_pfn; } /* @@ -633,8 +811,8 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone, } /* Perform the isolation */ - low_pfn = isolate_migratepages_range(zone, cc, low_pfn, end_pfn); - if (!low_pfn) + low_pfn = isolate_migratepages_range(zone, cc, low_pfn, end_pfn, false); + if (!low_pfn || cc->contended) return ISOLATE_ABORT; cc->migrate_pfn = low_pfn; @@ -645,33 +823,24 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone, static int compact_finished(struct zone *zone, struct compact_control *cc) { - unsigned int order; unsigned long watermark; if (fatal_signal_pending(current)) return COMPACT_PARTIAL; - /* - * A full (order == -1) compaction run starts at the beginning and - * end of a zone; it completes when the migrate and free scanner meet. - * A partial (order > 0) compaction can start with the free scanner - * at a random point in the zone, and may have to restart. - */ + /* Compaction run completes if the migrate and free scanner meet */ if (cc->free_pfn <= cc->migrate_pfn) { - if (cc->order > 0 && !cc->wrapped) { - /* We started partway through; restart at the end. */ - unsigned long free_pfn = start_free_pfn(zone); - zone->compact_cached_free_pfn = free_pfn; - cc->free_pfn = free_pfn; - cc->wrapped = 1; - return COMPACT_CONTINUE; - } - return COMPACT_COMPLETE; - } + /* + * Mark that the PG_migrate_skip information should be cleared + * by kswapd when it goes to sleep. kswapd does not set the + * flag itself as the decision to be clear should be directly + * based on an allocation request. + */ + if (!current_is_kswapd()) + zone->compact_blockskip_flush = true; - /* We wrapped around and ended up where we started. */ - if (cc->wrapped && cc->free_pfn <= cc->start_free_pfn) return COMPACT_COMPLETE; + } /* * order == -1 is expected when compacting via @@ -688,14 +857,22 @@ static int compact_finished(struct zone *zone, return COMPACT_CONTINUE; /* Direct compactor: Is a suitable page free? */ - for (order = cc->order; order < MAX_ORDER; order++) { - /* Job done if page is free of the right migratetype */ - if (!list_empty(&zone->free_area[order].free_list[cc->migratetype])) - return COMPACT_PARTIAL; - - /* Job done if allocation would set block type */ - if (order >= pageblock_order && zone->free_area[order].nr_free) + if (cc->page) { + /* Was a suitable page captured? */ + if (*cc->page) return COMPACT_PARTIAL; + } else { + unsigned int order; + for (order = cc->order; order < MAX_ORDER; order++) { + struct free_area *area = &zone->free_area[cc->order]; + /* Job done if page is free of the right migratetype */ + if (!list_empty(&area->free_list[cc->migratetype])) + return COMPACT_PARTIAL; + + /* Job done if allocation would set block type */ + if (cc->order >= pageblock_order && area->nr_free) + return COMPACT_PARTIAL; + } } return COMPACT_CONTINUE; @@ -754,6 +931,8 @@ unsigned long compaction_suitable(struct zone *zone, int order) static int compact_zone(struct zone *zone, struct compact_control *cc) { int ret; + unsigned long start_pfn = zone->zone_start_pfn; + unsigned long end_pfn = zone->zone_start_pfn + zone->spanned_pages; ret = compaction_suitable(zone, cc->order); switch (ret) { @@ -766,18 +945,30 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) ; } - /* Setup to move all movable pages to the end of the zone */ - cc->migrate_pfn = zone->zone_start_pfn; - - if (cc->order > 0) { - /* Incremental compaction. Start where the last one stopped. */ - cc->free_pfn = zone->compact_cached_free_pfn; - cc->start_free_pfn = cc->free_pfn; - } else { - /* Order == -1 starts at the end of the zone. */ - cc->free_pfn = start_free_pfn(zone); + /* + * Setup to move all movable pages to the end of the zone. Used cached + * information on where the scanners should start but check that it + * is initialised by ensuring the values are within zone boundaries. + */ + cc->migrate_pfn = zone->compact_cached_migrate_pfn; + cc->free_pfn = zone->compact_cached_free_pfn; + if (cc->free_pfn < start_pfn || cc->free_pfn > end_pfn) { + cc->free_pfn = end_pfn & ~(pageblock_nr_pages-1); + zone->compact_cached_free_pfn = cc->free_pfn; + } + if (cc->migrate_pfn < start_pfn || cc->migrate_pfn > end_pfn) { + cc->migrate_pfn = start_pfn; + zone->compact_cached_migrate_pfn = cc->migrate_pfn; } + /* + * Clear pageblock skip if there were failures recently and compaction + * is about to be retried after being deferred. kswapd does not do + * this reset as it'll reset the cached information when going to sleep. + */ + if (compaction_restarting(zone, cc->order) && !current_is_kswapd()) + __reset_isolation_suitable(zone); + migrate_prep_local(); while ((ret = compact_finished(zone, cc)) == COMPACT_CONTINUE) { @@ -787,6 +978,8 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) switch (isolate_migratepages(zone, cc)) { case ISOLATE_ABORT: ret = COMPACT_PARTIAL; + putback_lru_pages(&cc->migratepages); + cc->nr_migratepages = 0; goto out; case ISOLATE_NONE: continue; @@ -817,6 +1010,9 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) goto out; } } + + /* Capture a page now if it is a suitable size */ + compact_capture_page(cc); } out: @@ -829,8 +1025,10 @@ out: static unsigned long compact_zone_order(struct zone *zone, int order, gfp_t gfp_mask, - bool sync, bool *contended) + bool sync, bool *contended, + struct page **page) { + unsigned long ret; struct compact_control cc = { .nr_freepages = 0, .nr_migratepages = 0, @@ -838,12 +1036,18 @@ static unsigned long compact_zone_order(struct zone *zone, .migratetype = allocflags_to_migratetype(gfp_mask), .zone = zone, .sync = sync, - .contended = contended, + .page = page, }; INIT_LIST_HEAD(&cc.freepages); INIT_LIST_HEAD(&cc.migratepages); - return compact_zone(zone, &cc); + ret = compact_zone(zone, &cc); + + VM_BUG_ON(!list_empty(&cc.freepages)); + VM_BUG_ON(!list_empty(&cc.migratepages)); + + *contended = cc.contended; + return ret; } int sysctl_extfrag_threshold = 500; @@ -855,12 +1059,14 @@ int sysctl_extfrag_threshold = 500; * @gfp_mask: The GFP mask of the current allocation * @nodemask: The allowed nodes to allocate from * @sync: Whether migration is synchronous or not + * @contended: Return value that is true if compaction was aborted due to lock contention + * @page: Optionally capture a free page of the requested order during compaction * * This is the main entry point for direct page compaction. */ unsigned long try_to_compact_pages(struct zonelist *zonelist, int order, gfp_t gfp_mask, nodemask_t *nodemask, - bool sync, bool *contended) + bool sync, bool *contended, struct page **page) { enum zone_type high_zoneidx = gfp_zone(gfp_mask); int may_enter_fs = gfp_mask & __GFP_FS; @@ -868,28 +1074,30 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist, struct zoneref *z; struct zone *zone; int rc = COMPACT_SKIPPED; + int alloc_flags = 0; - /* - * Check whether it is worth even starting compaction. The order check is - * made because an assumption is made that the page allocator can satisfy - * the "cheaper" orders without taking special steps - */ + /* Check if the GFP flags allow compaction */ if (!order || !may_enter_fs || !may_perform_io) return rc; count_vm_event(COMPACTSTALL); +#ifdef CONFIG_CMA + if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE) + alloc_flags |= ALLOC_CMA; +#endif /* Compact each zone in the list */ for_each_zone_zonelist_nodemask(zone, z, zonelist, high_zoneidx, nodemask) { int status; status = compact_zone_order(zone, order, gfp_mask, sync, - contended); + contended, page); rc = max(status, rc); /* If a normal allocation would succeed, stop compacting */ - if (zone_watermark_ok(zone, order, low_wmark_pages(zone), 0, 0)) + if (zone_watermark_ok(zone, order, low_wmark_pages(zone), 0, + alloc_flags)) break; } @@ -940,6 +1148,7 @@ int compact_pgdat(pg_data_t *pgdat, int order) struct compact_control cc = { .order = order, .sync = false, + .page = NULL, }; return __compact_pgdat(pgdat, &cc); @@ -950,6 +1159,7 @@ static int compact_node(int nid) struct compact_control cc = { .order = -1, .sync = true, + .page = NULL, }; return __compact_pgdat(NODE_DATA(nid), &cc); diff --git a/mm/filemap.c b/mm/filemap.c index 384344575c37..83efee76a5c0 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1607,13 +1607,13 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) * Do we have something in the page cache already? */ page = find_get_page(mapping, offset); - if (likely(page)) { + if (likely(page) && !(vmf->flags & FAULT_FLAG_TRIED)) { /* * We found the page, so try async readahead before * waiting for the lock. */ do_async_mmap_readahead(vma, ra, file, page, offset); - } else { + } else if (!page) { /* No page in the page cache at all */ do_sync_mmap_readahead(vma, ra, file, offset); count_vm_event(PGMAJFAULT); @@ -1737,6 +1737,7 @@ EXPORT_SYMBOL(filemap_page_mkwrite); const struct vm_operations_struct generic_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = filemap_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; /* This is used for a general mmap of a disk file */ @@ -1749,7 +1750,6 @@ int generic_file_mmap(struct file * file, struct vm_area_struct * vma) return -ENOEXEC; file_accessed(file); vma->vm_ops = &generic_file_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c index 13e013b1270c..a912da6ddfd4 100644 --- a/mm/filemap_xip.c +++ b/mm/filemap_xip.c @@ -167,7 +167,6 @@ __xip_unmap (struct address_space * mapping, { struct vm_area_struct *vma; struct mm_struct *mm; - struct prio_tree_iter iter; unsigned long address; pte_t *pte; pte_t pteval; @@ -184,7 +183,7 @@ __xip_unmap (struct address_space * mapping, retry: mutex_lock(&mapping->i_mmap_mutex); - vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { mm = vma->vm_mm; address = vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); @@ -193,11 +192,13 @@ retry: if (pte) { /* Nuke the page table entry. */ flush_cache_page(vma, address, pte_pfn(*pte)); - pteval = ptep_clear_flush_notify(vma, address, pte); + pteval = ptep_clear_flush(vma, address, pte); page_remove_rmap(page); dec_mm_counter(mm, MM_FILEPAGES); BUG_ON(pte_dirty(pteval)); pte_unmap_unlock(pte, ptl); + /* must invalidate_page _before_ freeing the page */ + mmu_notifier_invalidate_page(mm, address); page_cache_release(page); } } @@ -305,6 +306,7 @@ out: static const struct vm_operations_struct xip_file_vm_ops = { .fault = xip_file_fault, .page_mkwrite = filemap_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; int xip_file_mmap(struct file * file, struct vm_area_struct * vma) @@ -313,7 +315,7 @@ int xip_file_mmap(struct file * file, struct vm_area_struct * vma) file_accessed(file); vma->vm_ops = &xip_file_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR | VM_MIXEDMAP; + vma->vm_flags |= VM_MIXEDMAP; return 0; } EXPORT_SYMBOL_GPL(xip_file_mmap); diff --git a/mm/fremap.c b/mm/fremap.c index 048659c0c03d..3899a86851ce 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -5,6 +5,7 @@ * * started by Ingo Molnar, Copyright (C) 2002, 2003 */ +#include <linux/export.h> #include <linux/backing-dev.h> #include <linux/mm.h> #include <linux/swap.h> @@ -80,9 +81,10 @@ out: return err; } -static int populate_range(struct mm_struct *mm, struct vm_area_struct *vma, - unsigned long addr, unsigned long size, pgoff_t pgoff) +int generic_file_remap_pages(struct vm_area_struct *vma, unsigned long addr, + unsigned long size, pgoff_t pgoff) { + struct mm_struct *mm = vma->vm_mm; int err; do { @@ -95,9 +97,9 @@ static int populate_range(struct mm_struct *mm, struct vm_area_struct *vma, pgoff++; } while (size); - return 0; - + return 0; } +EXPORT_SYMBOL(generic_file_remap_pages); /** * sys_remap_file_pages - remap arbitrary pages of an existing VM_SHARED vma @@ -167,7 +169,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, if (vma->vm_private_data && !(vma->vm_flags & VM_NONLINEAR)) goto out; - if (!(vma->vm_flags & VM_CAN_NONLINEAR)) + if (!vma->vm_ops->remap_pages) goto out; if (start < vma->vm_start || start + size > vma->vm_end) @@ -212,7 +214,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, mutex_lock(&mapping->i_mmap_mutex); flush_dcache_mmap_lock(mapping); vma->vm_flags |= VM_NONLINEAR; - vma_prio_tree_remove(vma, &mapping->i_mmap); + vma_interval_tree_remove(vma, &mapping->i_mmap); vma_nonlinear_insert(vma, &mapping->i_mmap_nonlinear); flush_dcache_mmap_unlock(mapping); mutex_unlock(&mapping->i_mmap_mutex); @@ -228,7 +230,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, } mmu_notifier_invalidate_range_start(mm, start, start + size); - err = populate_range(mm, vma, start, size, pgoff); + err = vma->vm_ops->remap_pages(vma, start, size, pgoff); mmu_notifier_invalidate_range_end(mm, start, start + size); if (!err && !(flags & MAP_NONBLOCK)) { if (vma->vm_flags & VM_LOCKED) { diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 141dbb695097..a863af26c79c 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -102,10 +102,7 @@ static int set_recommended_min_free_kbytes(void) unsigned long recommended_min; extern int min_free_kbytes; - if (!test_bit(TRANSPARENT_HUGEPAGE_FLAG, - &transparent_hugepage_flags) && - !test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, - &transparent_hugepage_flags)) + if (!khugepaged_enabled()) return 0; for_each_populated_zone(zone) @@ -139,12 +136,6 @@ static int start_khugepaged(void) { int err = 0; if (khugepaged_enabled()) { - int wakeup; - if (unlikely(!mm_slot_cache || !mm_slots_hash)) { - err = -ENOMEM; - goto out; - } - mutex_lock(&khugepaged_mutex); if (!khugepaged_thread) khugepaged_thread = kthread_run(khugepaged, NULL, "khugepaged"); @@ -154,16 +145,16 @@ static int start_khugepaged(void) err = PTR_ERR(khugepaged_thread); khugepaged_thread = NULL; } - wakeup = !list_empty(&khugepaged_scan.mm_head); - mutex_unlock(&khugepaged_mutex); - if (wakeup) + + if (!list_empty(&khugepaged_scan.mm_head)) wake_up_interruptible(&khugepaged_wait); set_recommended_min_free_kbytes(); - } else - /* wakeup to exit */ - wake_up_interruptible(&khugepaged_wait); -out: + } else if (khugepaged_thread) { + kthread_stop(khugepaged_thread); + khugepaged_thread = NULL; + } + return err; } @@ -224,18 +215,16 @@ static ssize_t enabled_store(struct kobject *kobj, TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG); if (ret > 0) { - int err = start_khugepaged(); + int err; + + mutex_lock(&khugepaged_mutex); + err = start_khugepaged(); + mutex_unlock(&khugepaged_mutex); + if (err) ret = err; } - if (ret > 0 && - (test_bit(TRANSPARENT_HUGEPAGE_FLAG, - &transparent_hugepage_flags) || - test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, - &transparent_hugepage_flags))) - set_recommended_min_free_kbytes(); - return ret; } static struct kobj_attribute enabled_attr = @@ -570,8 +559,6 @@ static int __init hugepage_init(void) start_khugepaged(); - set_recommended_min_free_kbytes(); - return 0; out: hugepage_exit_sysfs(hugepage_kobj); @@ -611,19 +598,6 @@ out: } __setup("transparent_hugepage=", setup_transparent_hugepage); -static void prepare_pmd_huge_pte(pgtable_t pgtable, - struct mm_struct *mm) -{ - assert_spin_locked(&mm->page_table_lock); - - /* FIFO */ - if (!mm->pmd_huge_pte) - INIT_LIST_HEAD(&pgtable->lru); - else - list_add(&pgtable->lru, &mm->pmd_huge_pte->lru); - mm->pmd_huge_pte = pgtable; -} - static inline pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma) { if (likely(vma->vm_flags & VM_WRITE)) @@ -665,7 +639,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm, */ page_add_new_anon_rmap(page, vma, haddr); set_pmd_at(mm, haddr, pmd, entry); - prepare_pmd_huge_pte(pgtable, mm); + pgtable_trans_huge_deposit(mm, pgtable); add_mm_counter(mm, MM_ANONPAGES, HPAGE_PMD_NR); mm->nr_ptes++; spin_unlock(&mm->page_table_lock); @@ -791,7 +765,7 @@ int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, pmdp_set_wrprotect(src_mm, addr, src_pmd); pmd = pmd_mkold(pmd_wrprotect(pmd)); set_pmd_at(dst_mm, addr, dst_pmd, pmd); - prepare_pmd_huge_pte(pgtable, dst_mm); + pgtable_trans_huge_deposit(dst_mm, pgtable); dst_mm->nr_ptes++; ret = 0; @@ -802,25 +776,6 @@ out: return ret; } -/* no "address" argument so destroys page coloring of some arch */ -pgtable_t get_pmd_huge_pte(struct mm_struct *mm) -{ - pgtable_t pgtable; - - assert_spin_locked(&mm->page_table_lock); - - /* FIFO */ - pgtable = mm->pmd_huge_pte; - if (list_empty(&pgtable->lru)) - mm->pmd_huge_pte = NULL; - else { - mm->pmd_huge_pte = list_entry(pgtable->lru.next, - struct page, lru); - list_del(&pgtable->lru); - } - return pgtable; -} - static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, @@ -832,6 +787,8 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, pmd_t _pmd; int ret = 0, i; struct page **pages; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ pages = kmalloc(sizeof(struct page *) * HPAGE_PMD_NR, GFP_KERNEL); @@ -868,15 +825,19 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, cond_resched(); } + mmun_start = haddr; + mmun_end = haddr + HPAGE_PMD_SIZE; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); + spin_lock(&mm->page_table_lock); if (unlikely(!pmd_same(*pmd, orig_pmd))) goto out_free_pages; VM_BUG_ON(!PageHead(page)); - pmdp_clear_flush_notify(vma, haddr, pmd); + pmdp_clear_flush(vma, haddr, pmd); /* leave pmd empty until pte is filled */ - pgtable = get_pmd_huge_pte(mm); + pgtable = pgtable_trans_huge_withdraw(mm); pmd_populate(mm, &_pmd, pgtable); for (i = 0; i < HPAGE_PMD_NR; i++, haddr += PAGE_SIZE) { @@ -896,6 +857,8 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, page_remove_rmap(page); spin_unlock(&mm->page_table_lock); + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); + ret |= VM_FAULT_WRITE; put_page(page); @@ -904,6 +867,7 @@ out: out_free_pages: spin_unlock(&mm->page_table_lock); + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); mem_cgroup_uncharge_start(); for (i = 0; i < HPAGE_PMD_NR; i++) { mem_cgroup_uncharge_page(pages[i]); @@ -920,6 +884,8 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, int ret = 0; struct page *page, *new_page; unsigned long haddr; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ VM_BUG_ON(!vma->anon_vma); spin_lock(&mm->page_table_lock); @@ -934,7 +900,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, entry = pmd_mkyoung(orig_pmd); entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma); if (pmdp_set_access_flags(vma, haddr, pmd, entry, 1)) - update_mmu_cache(vma, address, entry); + update_mmu_cache_pmd(vma, address, pmd); ret |= VM_FAULT_WRITE; goto out_unlock; } @@ -970,38 +936,47 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, copy_user_huge_page(new_page, page, haddr, vma, HPAGE_PMD_NR); __SetPageUptodate(new_page); + mmun_start = haddr; + mmun_end = haddr + HPAGE_PMD_SIZE; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); + spin_lock(&mm->page_table_lock); put_page(page); if (unlikely(!pmd_same(*pmd, orig_pmd))) { spin_unlock(&mm->page_table_lock); mem_cgroup_uncharge_page(new_page); put_page(new_page); - goto out; + goto out_mn; } else { pmd_t entry; VM_BUG_ON(!PageHead(page)); entry = mk_pmd(new_page, vma->vm_page_prot); entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma); entry = pmd_mkhuge(entry); - pmdp_clear_flush_notify(vma, haddr, pmd); + pmdp_clear_flush(vma, haddr, pmd); page_add_new_anon_rmap(new_page, vma, haddr); set_pmd_at(mm, haddr, pmd, entry); - update_mmu_cache(vma, address, entry); + update_mmu_cache_pmd(vma, address, pmd); page_remove_rmap(page); put_page(page); ret |= VM_FAULT_WRITE; } -out_unlock: spin_unlock(&mm->page_table_lock); +out_mn: + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); out: return ret; +out_unlock: + spin_unlock(&mm->page_table_lock); + return ret; } -struct page *follow_trans_huge_pmd(struct mm_struct *mm, +struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, unsigned int flags) { + struct mm_struct *mm = vma->vm_mm; struct page *page = NULL; assert_spin_locked(&mm->page_table_lock); @@ -1024,6 +999,14 @@ struct page *follow_trans_huge_pmd(struct mm_struct *mm, _pmd = pmd_mkyoung(pmd_mkdirty(*pmd)); set_pmd_at(mm, addr & HPAGE_PMD_MASK, pmd, _pmd); } + if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) { + if (page->mapping && trylock_page(page)) { + lru_add_drain(); + if (page->mapping) + mlock_vma_page(page); + unlock_page(page); + } + } page += (addr & ~HPAGE_PMD_MASK) >> PAGE_SHIFT; VM_BUG_ON(!PageCompound(page)); if (flags & FOLL_GET) @@ -1041,9 +1024,10 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, if (__pmd_trans_huge_lock(pmd, vma) == 1) { struct page *page; pgtable_t pgtable; - pgtable = get_pmd_huge_pte(tlb->mm); - page = pmd_page(*pmd); - pmd_clear(pmd); + pmd_t orig_pmd; + pgtable = pgtable_trans_huge_withdraw(tlb->mm); + orig_pmd = pmdp_get_and_clear(tlb->mm, addr, pmd); + page = pmd_page(orig_pmd); tlb_remove_pmd_tlb_entry(tlb, pmd, addr); page_remove_rmap(page); VM_BUG_ON(page_mapcount(page) < 0); @@ -1207,7 +1191,11 @@ static int __split_huge_page_splitting(struct page *page, struct mm_struct *mm = vma->vm_mm; pmd_t *pmd; int ret = 0; + /* For mmu_notifiers */ + const unsigned long mmun_start = address; + const unsigned long mmun_end = address + HPAGE_PMD_SIZE; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); spin_lock(&mm->page_table_lock); pmd = page_check_address_pmd(page, mm, address, PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG); @@ -1219,10 +1207,11 @@ static int __split_huge_page_splitting(struct page *page, * and it won't wait on the anon_vma->root->mutex to * serialize against split_huge_page*. */ - pmdp_splitting_flush_notify(vma, address, pmd); + pmdp_splitting_flush(vma, address, pmd); ret = 1; } spin_unlock(&mm->page_table_lock); + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); return ret; } @@ -1358,11 +1347,11 @@ static int __split_huge_page_map(struct page *page, pmd = page_check_address_pmd(page, mm, address, PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG); if (pmd) { - pgtable = get_pmd_huge_pte(mm); + pgtable = pgtable_trans_huge_withdraw(mm); pmd_populate(mm, &_pmd, pgtable); - for (i = 0, haddr = address; i < HPAGE_PMD_NR; - i++, haddr += PAGE_SIZE) { + haddr = address; + for (i = 0; i < HPAGE_PMD_NR; i++, haddr += PAGE_SIZE) { pte_t *pte, entry; BUG_ON(PageCompound(page+i)); entry = mk_pte(page + i, vma->vm_page_prot); @@ -1406,8 +1395,7 @@ static int __split_huge_page_map(struct page *page, * SMP TLB and finally we write the non-huge version * of the pmd entry with pmd_populate. */ - set_pmd_at(mm, address, pmd, pmd_mknotpresent(*pmd)); - flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE); + pmdp_invalidate(vma, address, pmd); pmd_populate(mm, pmd, pgtable); ret = 1; } @@ -1421,18 +1409,17 @@ static void __split_huge_page(struct page *page, struct anon_vma *anon_vma) { int mapcount, mapcount2; + pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); struct anon_vma_chain *avc; BUG_ON(!PageHead(page)); BUG_ON(PageTail(page)); mapcount = 0; - list_for_each_entry(avc, &anon_vma->head, same_anon_vma) { + anon_vma_interval_tree_foreach(avc, &anon_vma->rb_root, pgoff, pgoff) { struct vm_area_struct *vma = avc->vma; unsigned long addr = vma_address(page, vma); BUG_ON(is_vma_temporary_stack(vma)); - if (addr == -EFAULT) - continue; mapcount += __split_huge_page_splitting(page, vma, addr); } /* @@ -1453,12 +1440,10 @@ static void __split_huge_page(struct page *page, __split_huge_page_refcount(page); mapcount2 = 0; - list_for_each_entry(avc, &anon_vma->head, same_anon_vma) { + anon_vma_interval_tree_foreach(avc, &anon_vma->rb_root, pgoff, pgoff) { struct vm_area_struct *vma = avc->vma; unsigned long addr = vma_address(page, vma); BUG_ON(is_vma_temporary_stack(vma)); - if (addr == -EFAULT) - continue; mapcount2 += __split_huge_page_map(page, vma, addr); } if (mapcount != mapcount2) @@ -1491,12 +1476,13 @@ out: return ret; } -#define VM_NO_THP (VM_SPECIAL|VM_INSERTPAGE|VM_MIXEDMAP|VM_SAO| \ - VM_HUGETLB|VM_SHARED|VM_MAYSHARE) +#define VM_NO_THP (VM_SPECIAL|VM_MIXEDMAP|VM_HUGETLB|VM_SHARED|VM_MAYSHARE) int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags, int advice) { + struct mm_struct *mm = vma->vm_mm; + switch (advice) { case MADV_HUGEPAGE: /* @@ -1504,6 +1490,8 @@ int hugepage_madvise(struct vm_area_struct *vma, */ if (*vm_flags & (VM_HUGEPAGE | VM_NO_THP)) return -EINVAL; + if (mm->def_flags & VM_NOHUGEPAGE) + return -EINVAL; *vm_flags &= ~VM_NOHUGEPAGE; *vm_flags |= VM_HUGEPAGE; /* @@ -1655,11 +1643,7 @@ int khugepaged_enter_vma_merge(struct vm_area_struct *vma) if (vma->vm_ops) /* khugepaged not yet working on file or special mappings */ return 0; - /* - * If is_pfn_mapping() is true is_learn_pfn_mapping() must be - * true too, verify it here. - */ - VM_BUG_ON(is_linear_pfn_mapping(vma) || vma->vm_flags & VM_NO_THP); + VM_BUG_ON(vma->vm_flags & VM_NO_THP); hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK; hend = vma->vm_end & HPAGE_PMD_MASK; if (hstart < hend) @@ -1833,28 +1817,35 @@ static void __collapse_huge_page_copy(pte_t *pte, struct page *page, } } -static void collapse_huge_page(struct mm_struct *mm, - unsigned long address, - struct page **hpage, - struct vm_area_struct *vma, - int node) +static void khugepaged_alloc_sleep(void) { - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd, _pmd; - pte_t *pte; - pgtable_t pgtable; - struct page *new_page; - spinlock_t *ptl; - int isolated; - unsigned long hstart, hend; + wait_event_freezable_timeout(khugepaged_wait, false, + msecs_to_jiffies(khugepaged_alloc_sleep_millisecs)); +} - VM_BUG_ON(address & ~HPAGE_PMD_MASK); -#ifndef CONFIG_NUMA - up_read(&mm->mmap_sem); - VM_BUG_ON(!*hpage); - new_page = *hpage; -#else +#ifdef CONFIG_NUMA +static bool khugepaged_prealloc_page(struct page **hpage, bool *wait) +{ + if (IS_ERR(*hpage)) { + if (!*wait) + return false; + + *wait = false; + *hpage = NULL; + khugepaged_alloc_sleep(); + } else if (*hpage) { + put_page(*hpage); + *hpage = NULL; + } + + return true; +} + +static struct page +*khugepaged_alloc_page(struct page **hpage, struct mm_struct *mm, + struct vm_area_struct *vma, unsigned long address, + int node) +{ VM_BUG_ON(*hpage); /* * Allocate the page while the vma is still valid and under @@ -1866,7 +1857,7 @@ static void collapse_huge_page(struct mm_struct *mm, * mmap_sem in read mode is good idea also to allow greater * scalability. */ - new_page = alloc_hugepage_vma(khugepaged_defrag(), vma, address, + *hpage = alloc_hugepage_vma(khugepaged_defrag(), vma, address, node, __GFP_OTHER_NODE); /* @@ -1874,20 +1865,85 @@ static void collapse_huge_page(struct mm_struct *mm, * preparation for taking it in write mode. */ up_read(&mm->mmap_sem); - if (unlikely(!new_page)) { + if (unlikely(!*hpage)) { count_vm_event(THP_COLLAPSE_ALLOC_FAILED); *hpage = ERR_PTR(-ENOMEM); - return; + return NULL; } -#endif count_vm_event(THP_COLLAPSE_ALLOC); - if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) { -#ifdef CONFIG_NUMA - put_page(new_page); + return *hpage; +} +#else +static struct page *khugepaged_alloc_hugepage(bool *wait) +{ + struct page *hpage; + + do { + hpage = alloc_hugepage(khugepaged_defrag()); + if (!hpage) { + count_vm_event(THP_COLLAPSE_ALLOC_FAILED); + if (!*wait) + return NULL; + + *wait = false; + khugepaged_alloc_sleep(); + } else + count_vm_event(THP_COLLAPSE_ALLOC); + } while (unlikely(!hpage) && likely(khugepaged_enabled())); + + return hpage; +} + +static bool khugepaged_prealloc_page(struct page **hpage, bool *wait) +{ + if (!*hpage) + *hpage = khugepaged_alloc_hugepage(wait); + + if (unlikely(!*hpage)) + return false; + + return true; +} + +static struct page +*khugepaged_alloc_page(struct page **hpage, struct mm_struct *mm, + struct vm_area_struct *vma, unsigned long address, + int node) +{ + up_read(&mm->mmap_sem); + VM_BUG_ON(!*hpage); + return *hpage; +} #endif + +static void collapse_huge_page(struct mm_struct *mm, + unsigned long address, + struct page **hpage, + struct vm_area_struct *vma, + int node) +{ + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd, _pmd; + pte_t *pte; + pgtable_t pgtable; + struct page *new_page; + spinlock_t *ptl; + int isolated; + unsigned long hstart, hend; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ + + VM_BUG_ON(address & ~HPAGE_PMD_MASK); + + /* release the mmap_sem read lock. */ + new_page = khugepaged_alloc_page(hpage, mm, vma, address, node); + if (!new_page) + return; + + if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) return; - } /* * Prevent all access to pagetables with the exception of @@ -1912,11 +1968,7 @@ static void collapse_huge_page(struct mm_struct *mm, goto out; if (is_vma_temporary_stack(vma)) goto out; - /* - * If is_pfn_mapping() is true is_learn_pfn_mapping() must be - * true too, verify it here. - */ - VM_BUG_ON(is_linear_pfn_mapping(vma) || vma->vm_flags & VM_NO_THP); + VM_BUG_ON(vma->vm_flags & VM_NO_THP); pgd = pgd_offset(mm, address); if (!pgd_present(*pgd)) @@ -1936,6 +1988,9 @@ static void collapse_huge_page(struct mm_struct *mm, pte = pte_offset_map(pmd, address); ptl = pte_lockptr(mm, pmd); + mmun_start = address; + mmun_end = address + HPAGE_PMD_SIZE; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); spin_lock(&mm->page_table_lock); /* probably unnecessary */ /* * After this gup_fast can't run anymore. This also removes @@ -1943,8 +1998,9 @@ static void collapse_huge_page(struct mm_struct *mm, * huge and small TLB entries for the same virtual address * to avoid the risk of CPU bugs in that area. */ - _pmd = pmdp_clear_flush_notify(vma, address, pmd); + _pmd = pmdp_clear_flush(vma, address, pmd); spin_unlock(&mm->page_table_lock); + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); spin_lock(ptl); isolated = __collapse_huge_page_isolate(vma, address, pte); @@ -1970,8 +2026,6 @@ static void collapse_huge_page(struct mm_struct *mm, pte_unmap(pte); __SetPageUptodate(new_page); pgtable = pmd_pgtable(_pmd); - VM_BUG_ON(page_count(pgtable) != 1); - VM_BUG_ON(page_mapcount(pgtable) != 0); _pmd = mk_pmd(new_page, vma->vm_page_prot); _pmd = maybe_pmd_mkwrite(pmd_mkdirty(_pmd), vma); @@ -1988,13 +2042,12 @@ static void collapse_huge_page(struct mm_struct *mm, BUG_ON(!pmd_none(*pmd)); page_add_new_anon_rmap(new_page, vma, address); set_pmd_at(mm, address, pmd, _pmd); - update_mmu_cache(vma, address, _pmd); - prepare_pmd_huge_pte(pgtable, mm); + update_mmu_cache_pmd(vma, address, pmd); + pgtable_trans_huge_deposit(mm, pgtable); spin_unlock(&mm->page_table_lock); -#ifndef CONFIG_NUMA *hpage = NULL; -#endif + khugepaged_pages_collapsed++; out_up_write: up_write(&mm->mmap_sem); @@ -2002,9 +2055,6 @@ out_up_write: out: mem_cgroup_uncharge_page(new_page); -#ifdef CONFIG_NUMA - put_page(new_page); -#endif goto out_up_write; } @@ -2154,12 +2204,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, goto skip; if (is_vma_temporary_stack(vma)) goto skip; - /* - * If is_pfn_mapping() is true is_learn_pfn_mapping() - * must be true too, verify it here. - */ - VM_BUG_ON(is_linear_pfn_mapping(vma) || - vma->vm_flags & VM_NO_THP); + VM_BUG_ON(vma->vm_flags & VM_NO_THP); hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK; hend = vma->vm_end & HPAGE_PMD_MASK; @@ -2234,32 +2279,23 @@ static int khugepaged_has_work(void) static int khugepaged_wait_event(void) { return !list_empty(&khugepaged_scan.mm_head) || - !khugepaged_enabled(); + kthread_should_stop(); } -static void khugepaged_do_scan(struct page **hpage) +static void khugepaged_do_scan(void) { + struct page *hpage = NULL; unsigned int progress = 0, pass_through_head = 0; unsigned int pages = khugepaged_pages_to_scan; + bool wait = true; barrier(); /* write khugepaged_pages_to_scan to local stack */ while (progress < pages) { - cond_resched(); - -#ifndef CONFIG_NUMA - if (!*hpage) { - *hpage = alloc_hugepage(khugepaged_defrag()); - if (unlikely(!*hpage)) { - count_vm_event(THP_COLLAPSE_ALLOC_FAILED); - break; - } - count_vm_event(THP_COLLAPSE_ALLOC); - } -#else - if (IS_ERR(*hpage)) + if (!khugepaged_prealloc_page(&hpage, &wait)) break; -#endif + + cond_resched(); if (unlikely(kthread_should_stop() || freezing(current))) break; @@ -2270,73 +2306,32 @@ static void khugepaged_do_scan(struct page **hpage) if (khugepaged_has_work() && pass_through_head < 2) progress += khugepaged_scan_mm_slot(pages - progress, - hpage); + &hpage); else progress = pages; spin_unlock(&khugepaged_mm_lock); } -} -static void khugepaged_alloc_sleep(void) -{ - wait_event_freezable_timeout(khugepaged_wait, false, - msecs_to_jiffies(khugepaged_alloc_sleep_millisecs)); + if (!IS_ERR_OR_NULL(hpage)) + put_page(hpage); } -#ifndef CONFIG_NUMA -static struct page *khugepaged_alloc_hugepage(void) +static void khugepaged_wait_work(void) { - struct page *hpage; - - do { - hpage = alloc_hugepage(khugepaged_defrag()); - if (!hpage) { - count_vm_event(THP_COLLAPSE_ALLOC_FAILED); - khugepaged_alloc_sleep(); - } else - count_vm_event(THP_COLLAPSE_ALLOC); - } while (unlikely(!hpage) && - likely(khugepaged_enabled())); - return hpage; -} -#endif + try_to_freeze(); -static void khugepaged_loop(void) -{ - struct page *hpage; + if (khugepaged_has_work()) { + if (!khugepaged_scan_sleep_millisecs) + return; -#ifdef CONFIG_NUMA - hpage = NULL; -#endif - while (likely(khugepaged_enabled())) { -#ifndef CONFIG_NUMA - hpage = khugepaged_alloc_hugepage(); - if (unlikely(!hpage)) - break; -#else - if (IS_ERR(hpage)) { - khugepaged_alloc_sleep(); - hpage = NULL; - } -#endif - - khugepaged_do_scan(&hpage); -#ifndef CONFIG_NUMA - if (hpage) - put_page(hpage); -#endif - try_to_freeze(); - if (unlikely(kthread_should_stop())) - break; - if (khugepaged_has_work()) { - if (!khugepaged_scan_sleep_millisecs) - continue; - wait_event_freezable_timeout(khugepaged_wait, false, - msecs_to_jiffies(khugepaged_scan_sleep_millisecs)); - } else if (khugepaged_enabled()) - wait_event_freezable(khugepaged_wait, - khugepaged_wait_event()); + wait_event_freezable_timeout(khugepaged_wait, + kthread_should_stop(), + msecs_to_jiffies(khugepaged_scan_sleep_millisecs)); + return; } + + if (khugepaged_enabled()) + wait_event_freezable(khugepaged_wait, khugepaged_wait_event()); } static int khugepaged(void *none) @@ -2346,20 +2341,9 @@ static int khugepaged(void *none) set_freezable(); set_user_nice(current, 19); - /* serialize with start_khugepaged() */ - mutex_lock(&khugepaged_mutex); - - for (;;) { - mutex_unlock(&khugepaged_mutex); - VM_BUG_ON(khugepaged_thread != current); - khugepaged_loop(); - VM_BUG_ON(khugepaged_thread != current); - - mutex_lock(&khugepaged_mutex); - if (!khugepaged_enabled()) - break; - if (unlikely(kthread_should_stop())) - break; + while (!kthread_should_stop()) { + khugepaged_do_scan(); + khugepaged_wait_work(); } spin_lock(&khugepaged_mm_lock); @@ -2368,10 +2352,6 @@ static int khugepaged(void *none) if (mm_slot) collect_mm_slot(mm_slot); spin_unlock(&khugepaged_mm_lock); - - khugepaged_thread = NULL; - mutex_unlock(&khugepaged_mutex); - return 0; } diff --git a/mm/hugetlb.c b/mm/hugetlb.c index bc727122dd44..59a0059b39e2 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -30,7 +30,6 @@ #include <linux/hugetlb.h> #include <linux/hugetlb_cgroup.h> #include <linux/node.h> -#include <linux/hugetlb_cgroup.h> #include "internal.h" const unsigned long hugetlb_zero = 0, hugetlb_infinity = ~0UL; @@ -637,6 +636,7 @@ static void free_huge_page(struct page *page) h->surplus_huge_pages--; h->surplus_huge_pages_node[nid]--; } else { + arch_clear_hugepage_flags(page); enqueue_huge_page(h, page); } spin_unlock(&hugetlb_lock); @@ -671,6 +671,11 @@ static void prep_compound_gigantic_page(struct page *page, unsigned long order) } } +/* + * PageHuge() only returns true for hugetlbfs pages, but not for normal or + * transparent huge pages. See the PageTransHuge() documentation for more + * details. + */ int PageHuge(struct page *page) { compound_page_dtor *dtor; @@ -2355,13 +2360,15 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, struct page *page; struct hstate *h = hstate_vma(vma); unsigned long sz = huge_page_size(h); + const unsigned long mmun_start = start; /* For mmu_notifiers */ + const unsigned long mmun_end = end; /* For mmu_notifiers */ WARN_ON(!is_vm_hugetlb_page(vma)); BUG_ON(start & ~huge_page_mask(h)); BUG_ON(end & ~huge_page_mask(h)); tlb_start_vma(tlb, vma); - mmu_notifier_invalidate_range_start(mm, start, end); + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); again: spin_lock(&mm->page_table_lock); for (address = start; address < end; address += sz) { @@ -2425,7 +2432,7 @@ again: if (address < end && !ref_page) goto again; } - mmu_notifier_invalidate_range_end(mm, start, end); + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); tlb_end_vma(tlb, vma); } @@ -2473,7 +2480,6 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma, struct hstate *h = hstate_vma(vma); struct vm_area_struct *iter_vma; struct address_space *mapping; - struct prio_tree_iter iter; pgoff_t pgoff; /* @@ -2481,7 +2487,8 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma, * from page cache lookup which is in HPAGE_SIZE units. */ address = address & huge_page_mask(h); - pgoff = vma_hugecache_offset(h, vma, address); + pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + + vma->vm_pgoff; mapping = vma->vm_file->f_dentry->d_inode->i_mapping; /* @@ -2490,7 +2497,7 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma, * __unmap_hugepage_range() is called as the lock is already held */ mutex_lock(&mapping->i_mmap_mutex); - vma_prio_tree_foreach(iter_vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(iter_vma, &mapping->i_mmap, pgoff, pgoff) { /* Do not unmap the current VMA */ if (iter_vma == vma) continue; @@ -2525,6 +2532,8 @@ static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma, struct page *old_page, *new_page; int avoidcopy; int outside_reserve = 0; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ old_page = pte_page(pte); @@ -2611,6 +2620,9 @@ retry_avoidcopy: pages_per_huge_page(h)); __SetPageUptodate(new_page); + mmun_start = address & huge_page_mask(h); + mmun_end = mmun_start + huge_page_size(h); + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); /* * Retake the page_table_lock to check for racing updates * before the page tables are altered @@ -2619,9 +2631,6 @@ retry_avoidcopy: ptep = huge_pte_offset(mm, address & huge_page_mask(h)); if (likely(pte_same(huge_ptep_get(ptep), pte))) { /* Break COW */ - mmu_notifier_invalidate_range_start(mm, - address & huge_page_mask(h), - (address & huge_page_mask(h)) + huge_page_size(h)); huge_ptep_clear_flush(vma, address, ptep); set_huge_pte_at(mm, address, ptep, make_huge_pte(vma, new_page, 1)); @@ -2629,10 +2638,11 @@ retry_avoidcopy: hugepage_add_new_anon_rmap(new_page, vma, address); /* Make the old page be freed below */ new_page = old_page; - mmu_notifier_invalidate_range_end(mm, - address & huge_page_mask(h), - (address & huge_page_mask(h)) + huge_page_size(h)); } + spin_unlock(&mm->page_table_lock); + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); + /* Caller expects lock to be held */ + spin_lock(&mm->page_table_lock); page_cache_release(new_page); page_cache_release(old_page); return 0; diff --git a/mm/internal.h b/mm/internal.h index b8c91b342e24..a4fa284f6bc2 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -118,26 +118,27 @@ struct compact_control { unsigned long nr_freepages; /* Number of isolated free pages */ unsigned long nr_migratepages; /* Number of pages to migrate */ unsigned long free_pfn; /* isolate_freepages search base */ - unsigned long start_free_pfn; /* where we started the search */ unsigned long migrate_pfn; /* isolate_migratepages search base */ bool sync; /* Synchronous migration */ - bool wrapped; /* Order > 0 compactions are - incremental, once free_pfn - and migrate_pfn meet, we restart - from the top of the zone; - remember we wrapped around. */ + bool ignore_skip_hint; /* Scan blocks even if marked skip */ + bool finished_update_free; /* True when the zone cached pfns are + * no longer being updated + */ + bool finished_update_migrate; int order; /* order a direct compactor needs */ int migratetype; /* MOVABLE, RECLAIMABLE etc */ struct zone *zone; - bool *contended; /* True if a lock was contended */ + bool contended; /* True if a lock was contended */ + struct page **page; /* Page captured of requested size */ }; unsigned long -isolate_freepages_range(unsigned long start_pfn, unsigned long end_pfn); +isolate_freepages_range(struct compact_control *cc, + unsigned long start_pfn, unsigned long end_pfn); unsigned long isolate_migratepages_range(struct zone *zone, struct compact_control *cc, - unsigned long low_pfn, unsigned long end_pfn); + unsigned long low_pfn, unsigned long end_pfn, bool unevictable); #endif @@ -167,9 +168,8 @@ static inline void munlock_vma_pages_all(struct vm_area_struct *vma) } /* - * Called only in fault path via page_evictable() for a new page - * to determine if it's being mapped into a LOCKED vma. - * If so, mark page as mlocked. + * Called only in fault path, to determine if a new page is being + * mapped into a LOCKED vma. If it is, mark page as mlocked. */ static inline int mlocked_vma_newpage(struct vm_area_struct *vma, struct page *page) @@ -180,7 +180,8 @@ static inline int mlocked_vma_newpage(struct vm_area_struct *vma, return 0; if (!TestSetPageMlocked(page)) { - inc_zone_page_state(page, NR_MLOCK); + mod_zone_page_state(page_zone(page), NR_MLOCK, + hpage_nr_pages(page)); count_vm_event(UNEVICTABLE_PGMLOCKED); } return 1; @@ -201,12 +202,7 @@ extern void munlock_vma_page(struct page *page); * If called for a page that is still mapped by mlocked vmas, all we do * is revert to lazy LRU behaviour -- semantics are not broken. */ -extern void __clear_page_mlock(struct page *page); -static inline void clear_page_mlock(struct page *page) -{ - if (unlikely(TestClearPageMlocked(page))) - __clear_page_mlock(page); -} +extern void clear_page_mlock(struct page *page); /* * mlock_migrate_page - called only from migrate_page_copy() to @@ -340,7 +336,6 @@ static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, #define ZONE_RECLAIM_FULL -1 #define ZONE_RECLAIM_SOME 0 #define ZONE_RECLAIM_SUCCESS 1 -#endif extern int hwpoison_filter(struct page *p); @@ -356,3 +351,20 @@ extern unsigned long vm_mmap_pgoff(struct file *, unsigned long, unsigned long, unsigned long); extern void set_pageblock_order(void); +unsigned long reclaim_clean_pages_from_list(struct zone *zone, + struct list_head *page_list); +/* The ALLOC_WMARK bits are used as an index to zone->watermark */ +#define ALLOC_WMARK_MIN WMARK_MIN +#define ALLOC_WMARK_LOW WMARK_LOW +#define ALLOC_WMARK_HIGH WMARK_HIGH +#define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */ + +/* Mask to get the watermark bits */ +#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1) + +#define ALLOC_HARDER 0x10 /* try to alloc harder */ +#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */ +#define ALLOC_CPUSET 0x40 /* check for correct cpuset */ +#define ALLOC_CMA 0x80 /* allow allocations from CMA areas */ + +#endif /* __MM_INTERNAL_H */ diff --git a/mm/interval_tree.c b/mm/interval_tree.c new file mode 100644 index 000000000000..4a5822a586e6 --- /dev/null +++ b/mm/interval_tree.c @@ -0,0 +1,112 @@ +/* + * mm/interval_tree.c - interval tree for mapping->i_mmap + * + * Copyright (C) 2012, Michel Lespinasse <walken@google.com> + * + * This file is released under the GPL v2. + */ + +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/rmap.h> +#include <linux/interval_tree_generic.h> + +static inline unsigned long vma_start_pgoff(struct vm_area_struct *v) +{ + return v->vm_pgoff; +} + +static inline unsigned long vma_last_pgoff(struct vm_area_struct *v) +{ + return v->vm_pgoff + ((v->vm_end - v->vm_start) >> PAGE_SHIFT) - 1; +} + +INTERVAL_TREE_DEFINE(struct vm_area_struct, shared.linear.rb, + unsigned long, shared.linear.rb_subtree_last, + vma_start_pgoff, vma_last_pgoff,, vma_interval_tree) + +/* Insert node immediately after prev in the interval tree */ +void vma_interval_tree_insert_after(struct vm_area_struct *node, + struct vm_area_struct *prev, + struct rb_root *root) +{ + struct rb_node **link; + struct vm_area_struct *parent; + unsigned long last = vma_last_pgoff(node); + + VM_BUG_ON(vma_start_pgoff(node) != vma_start_pgoff(prev)); + + if (!prev->shared.linear.rb.rb_right) { + parent = prev; + link = &prev->shared.linear.rb.rb_right; + } else { + parent = rb_entry(prev->shared.linear.rb.rb_right, + struct vm_area_struct, shared.linear.rb); + if (parent->shared.linear.rb_subtree_last < last) + parent->shared.linear.rb_subtree_last = last; + while (parent->shared.linear.rb.rb_left) { + parent = rb_entry(parent->shared.linear.rb.rb_left, + struct vm_area_struct, shared.linear.rb); + if (parent->shared.linear.rb_subtree_last < last) + parent->shared.linear.rb_subtree_last = last; + } + link = &parent->shared.linear.rb.rb_left; + } + + node->shared.linear.rb_subtree_last = last; + rb_link_node(&node->shared.linear.rb, &parent->shared.linear.rb, link); + rb_insert_augmented(&node->shared.linear.rb, root, + &vma_interval_tree_augment); +} + +static inline unsigned long avc_start_pgoff(struct anon_vma_chain *avc) +{ + return vma_start_pgoff(avc->vma); +} + +static inline unsigned long avc_last_pgoff(struct anon_vma_chain *avc) +{ + return vma_last_pgoff(avc->vma); +} + +INTERVAL_TREE_DEFINE(struct anon_vma_chain, rb, unsigned long, rb_subtree_last, + avc_start_pgoff, avc_last_pgoff, + static inline, __anon_vma_interval_tree) + +void anon_vma_interval_tree_insert(struct anon_vma_chain *node, + struct rb_root *root) +{ +#ifdef CONFIG_DEBUG_VM_RB + node->cached_vma_start = avc_start_pgoff(node); + node->cached_vma_last = avc_last_pgoff(node); +#endif + __anon_vma_interval_tree_insert(node, root); +} + +void anon_vma_interval_tree_remove(struct anon_vma_chain *node, + struct rb_root *root) +{ + __anon_vma_interval_tree_remove(node, root); +} + +struct anon_vma_chain * +anon_vma_interval_tree_iter_first(struct rb_root *root, + unsigned long first, unsigned long last) +{ + return __anon_vma_interval_tree_iter_first(root, first, last); +} + +struct anon_vma_chain * +anon_vma_interval_tree_iter_next(struct anon_vma_chain *node, + unsigned long first, unsigned long last) +{ + return __anon_vma_interval_tree_iter_next(node, first, last); +} + +#ifdef CONFIG_DEBUG_VM_RB +void anon_vma_interval_tree_verify(struct anon_vma_chain *node) +{ + WARN_ON_ONCE(node->cached_vma_start != avc_start_pgoff(node)); + WARN_ON_ONCE(node->cached_vma_last != avc_last_pgoff(node)); +} +#endif diff --git a/mm/kmemleak.c b/mm/kmemleak.c index 0de83b4541e9..a217cc544060 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -29,7 +29,7 @@ * - kmemleak_lock (rwlock): protects the object_list modifications and * accesses to the object_tree_root. The object_list is the main list * holding the metadata (struct kmemleak_object) for the allocated memory - * blocks. The object_tree_root is a priority search tree used to look-up + * blocks. The object_tree_root is a red black tree used to look-up * metadata based on a pointer to the corresponding memory block. The * kmemleak_object structures are added to the object_list and * object_tree_root in the create_object() function called from the @@ -71,7 +71,7 @@ #include <linux/delay.h> #include <linux/export.h> #include <linux/kthread.h> -#include <linux/prio_tree.h> +#include <linux/rbtree.h> #include <linux/fs.h> #include <linux/debugfs.h> #include <linux/seq_file.h> @@ -132,7 +132,7 @@ struct kmemleak_scan_area { * Structure holding the metadata for each allocated memory block. * Modifications to such objects should be made while holding the * object->lock. Insertions or deletions from object_list, gray_list or - * tree_node are already protected by the corresponding locks or mutex (see + * rb_node are already protected by the corresponding locks or mutex (see * the notes on locking above). These objects are reference-counted * (use_count) and freed using the RCU mechanism. */ @@ -141,7 +141,7 @@ struct kmemleak_object { unsigned long flags; /* object status flags */ struct list_head object_list; struct list_head gray_list; - struct prio_tree_node tree_node; + struct rb_node rb_node; struct rcu_head rcu; /* object_list lockless traversal */ /* object usage count; object freed when use_count == 0 */ atomic_t use_count; @@ -182,9 +182,9 @@ struct kmemleak_object { static LIST_HEAD(object_list); /* the list of gray-colored objects (see color_gray comment below) */ static LIST_HEAD(gray_list); -/* prio search tree for object boundaries */ -static struct prio_tree_root object_tree_root; -/* rw_lock protecting the access to object_list and prio_tree_root */ +/* search tree for object boundaries */ +static struct rb_root object_tree_root = RB_ROOT; +/* rw_lock protecting the access to object_list and object_tree_root */ static DEFINE_RWLOCK(kmemleak_lock); /* allocation caches for kmemleak internal data */ @@ -380,7 +380,7 @@ static void dump_object_info(struct kmemleak_object *object) trace.entries = object->trace; pr_notice("Object 0x%08lx (size %zu):\n", - object->tree_node.start, object->size); + object->pointer, object->size); pr_notice(" comm \"%s\", pid %d, jiffies %lu\n", object->comm, object->pid, object->jiffies); pr_notice(" min_count = %d\n", object->min_count); @@ -392,32 +392,32 @@ static void dump_object_info(struct kmemleak_object *object) } /* - * Look-up a memory block metadata (kmemleak_object) in the priority search + * Look-up a memory block metadata (kmemleak_object) in the object search * tree based on a pointer value. If alias is 0, only values pointing to the * beginning of the memory block are allowed. The kmemleak_lock must be held * when calling this function. */ static struct kmemleak_object *lookup_object(unsigned long ptr, int alias) { - struct prio_tree_node *node; - struct prio_tree_iter iter; - struct kmemleak_object *object; - - prio_tree_iter_init(&iter, &object_tree_root, ptr, ptr); - node = prio_tree_next(&iter); - if (node) { - object = prio_tree_entry(node, struct kmemleak_object, - tree_node); - if (!alias && object->pointer != ptr) { + struct rb_node *rb = object_tree_root.rb_node; + + while (rb) { + struct kmemleak_object *object = + rb_entry(rb, struct kmemleak_object, rb_node); + if (ptr < object->pointer) + rb = object->rb_node.rb_left; + else if (object->pointer + object->size <= ptr) + rb = object->rb_node.rb_right; + else if (object->pointer == ptr || alias) + return object; + else { kmemleak_warn("Found object by alias at 0x%08lx\n", ptr); dump_object_info(object); - object = NULL; + break; } - } else - object = NULL; - - return object; + } + return NULL; } /* @@ -471,7 +471,7 @@ static void put_object(struct kmemleak_object *object) } /* - * Look up an object in the prio search tree and increase its use_count. + * Look up an object in the object search tree and increase its use_count. */ static struct kmemleak_object *find_and_get_object(unsigned long ptr, int alias) { @@ -516,8 +516,8 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size, int min_count, gfp_t gfp) { unsigned long flags; - struct kmemleak_object *object; - struct prio_tree_node *node; + struct kmemleak_object *object, *parent; + struct rb_node **link, *rb_parent; object = kmem_cache_alloc(object_cache, gfp_kmemleak_mask(gfp)); if (!object) { @@ -560,31 +560,34 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size, /* kernel backtrace */ object->trace_len = __save_stack_trace(object->trace); - INIT_PRIO_TREE_NODE(&object->tree_node); - object->tree_node.start = ptr; - object->tree_node.last = ptr + size - 1; - write_lock_irqsave(&kmemleak_lock, flags); min_addr = min(min_addr, ptr); max_addr = max(max_addr, ptr + size); - node = prio_tree_insert(&object_tree_root, &object->tree_node); - /* - * The code calling the kernel does not yet have the pointer to the - * memory block to be able to free it. However, we still hold the - * kmemleak_lock here in case parts of the kernel started freeing - * random memory blocks. - */ - if (node != &object->tree_node) { - kmemleak_stop("Cannot insert 0x%lx into the object search tree " - "(already existing)\n", ptr); - object = lookup_object(ptr, 1); - spin_lock(&object->lock); - dump_object_info(object); - spin_unlock(&object->lock); - - goto out; + link = &object_tree_root.rb_node; + rb_parent = NULL; + while (*link) { + rb_parent = *link; + parent = rb_entry(rb_parent, struct kmemleak_object, rb_node); + if (ptr + size <= parent->pointer) + link = &parent->rb_node.rb_left; + else if (parent->pointer + parent->size <= ptr) + link = &parent->rb_node.rb_right; + else { + kmemleak_stop("Cannot insert 0x%lx into the object " + "search tree (overlaps existing)\n", + ptr); + kmem_cache_free(object_cache, object); + object = parent; + spin_lock(&object->lock); + dump_object_info(object); + spin_unlock(&object->lock); + goto out; + } } + rb_link_node(&object->rb_node, rb_parent, link); + rb_insert_color(&object->rb_node, &object_tree_root); + list_add_tail_rcu(&object->object_list, &object_list); out: write_unlock_irqrestore(&kmemleak_lock, flags); @@ -600,7 +603,7 @@ static void __delete_object(struct kmemleak_object *object) unsigned long flags; write_lock_irqsave(&kmemleak_lock, flags); - prio_tree_remove(&object_tree_root, &object->tree_node); + rb_erase(&object->rb_node, &object_tree_root); list_del_rcu(&object->object_list); write_unlock_irqrestore(&kmemleak_lock, flags); @@ -1766,7 +1769,6 @@ void __init kmemleak_init(void) object_cache = KMEM_CACHE(kmemleak_object, SLAB_NOLEAKTRACE); scan_area_cache = KMEM_CACHE(kmemleak_scan_area, SLAB_NOLEAKTRACE); - INIT_PRIO_TREE_ROOT(&object_tree_root); if (crt_early_log >= ARRAY_SIZE(early_log)) pr_warning("Early log buffer exceeded (%d), please increase " @@ -709,15 +709,22 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page, spinlock_t *ptl; int swapped; int err = -EFAULT; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ addr = page_address_in_vma(page, vma); if (addr == -EFAULT) goto out; BUG_ON(PageTransCompound(page)); + + mmun_start = addr; + mmun_end = addr + PAGE_SIZE; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); + ptep = page_check_address(page, mm, addr, &ptl, 0); if (!ptep) - goto out; + goto out_mn; if (pte_write(*ptep) || pte_dirty(*ptep)) { pte_t entry; @@ -752,6 +759,8 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page, out_unlock: pte_unmap_unlock(ptep, ptl); +out_mn: + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); out: return err; } @@ -776,6 +785,8 @@ static int replace_page(struct vm_area_struct *vma, struct page *page, spinlock_t *ptl; unsigned long addr; int err = -EFAULT; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ addr = page_address_in_vma(page, vma); if (addr == -EFAULT) @@ -794,10 +805,14 @@ static int replace_page(struct vm_area_struct *vma, struct page *page, if (!pmd_present(*pmd)) goto out; + mmun_start = addr; + mmun_end = addr + PAGE_SIZE; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); + ptep = pte_offset_map_lock(mm, pmd, addr, &ptl); if (!pte_same(*ptep, orig_pte)) { pte_unmap_unlock(ptep, ptl); - goto out; + goto out_mn; } get_page(kpage); @@ -814,6 +829,8 @@ static int replace_page(struct vm_area_struct *vma, struct page *page, pte_unmap_unlock(ptep, ptl); err = 0; +out_mn: + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); out: return err; } @@ -1469,10 +1486,14 @@ int ksm_madvise(struct vm_area_struct *vma, unsigned long start, */ if (*vm_flags & (VM_MERGEABLE | VM_SHARED | VM_MAYSHARE | VM_PFNMAP | VM_IO | VM_DONTEXPAND | - VM_RESERVED | VM_HUGETLB | VM_INSERTPAGE | - VM_NONLINEAR | VM_MIXEDMAP | VM_SAO)) + VM_HUGETLB | VM_NONLINEAR | VM_MIXEDMAP)) return 0; /* just ignore the advice */ +#ifdef VM_SAO + if (*vm_flags & VM_SAO) + return 0; +#endif + if (!test_bit(MMF_VM_MERGEABLE, &mm->flags)) { err = __ksm_enter(mm); if (err) @@ -1582,7 +1603,7 @@ struct page *ksm_does_need_to_copy(struct page *page, SetPageSwapBacked(new_page); __set_page_locked(new_page); - if (page_evictable(new_page, vma)) + if (!mlocked_vma_newpage(vma, new_page)) lru_cache_add_lru(new_page, LRU_ACTIVE_ANON); else add_page_to_unevictable_list(new_page); @@ -1614,7 +1635,8 @@ again: struct vm_area_struct *vma; anon_vma_lock(anon_vma); - list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) { + anon_vma_interval_tree_foreach(vmac, &anon_vma->rb_root, + 0, ULONG_MAX) { vma = vmac->vma; if (rmap_item->address < vma->vm_start || rmap_item->address >= vma->vm_end) @@ -1667,7 +1689,8 @@ again: struct vm_area_struct *vma; anon_vma_lock(anon_vma); - list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) { + anon_vma_interval_tree_foreach(vmac, &anon_vma->rb_root, + 0, ULONG_MAX) { vma = vmac->vma; if (rmap_item->address < vma->vm_start || rmap_item->address >= vma->vm_end) @@ -1719,7 +1742,8 @@ again: struct vm_area_struct *vma; anon_vma_lock(anon_vma); - list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) { + anon_vma_interval_tree_foreach(vmac, &anon_vma->rb_root, + 0, ULONG_MAX) { vma = vmac->vma; if (rmap_item->address < vma->vm_start || rmap_item->address >= vma->vm_end) diff --git a/mm/madvise.c b/mm/madvise.c index 14d260fa0d17..03dfa5c7adb3 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -69,10 +69,14 @@ static long madvise_behavior(struct vm_area_struct * vma, new_flags &= ~VM_DONTCOPY; break; case MADV_DONTDUMP: - new_flags |= VM_NODUMP; + new_flags |= VM_DONTDUMP; break; case MADV_DODUMP: - new_flags &= ~VM_NODUMP; + if (new_flags & VM_SPECIAL) { + error = -EINVAL; + goto out; + } + new_flags &= ~VM_DONTDUMP; break; case MADV_MERGEABLE: case MADV_UNMERGEABLE: diff --git a/mm/memblock.c b/mm/memblock.c index 82aa349d2f7a..931eef145af5 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -41,7 +41,8 @@ static int memblock_memory_in_slab __initdata_memblock = 0; static int memblock_reserved_in_slab __initdata_memblock = 0; /* inline so we don't get a warning when pr_debug is compiled out */ -static inline const char *memblock_type_name(struct memblock_type *type) +static __init_memblock const char * +memblock_type_name(struct memblock_type *type) { if (type == &memblock.memory) return "memory"; @@ -756,7 +757,7 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, return ret; for (i = start_rgn; i < end_rgn; i++) - type->regions[i].nid = nid; + memblock_set_region_node(&type->regions[i], nid); memblock_merge_regions(type); return 0; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a72f2ffdc3d0..7acf43bf04a2 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -51,6 +51,7 @@ #include <linux/oom.h> #include "internal.h" #include <net/sock.h> +#include <net/ip.h> #include <net/tcp_memcontrol.h> #include <asm/uaccess.h> @@ -326,7 +327,7 @@ struct mem_cgroup { struct mem_cgroup_stat_cpu nocpu_base; spinlock_t pcp_counter_lock; -#ifdef CONFIG_INET +#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET) struct tcp_memcontrol tcp_mem; #endif }; @@ -411,12 +412,14 @@ struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *s) return container_of(s, struct mem_cgroup, css); } +static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) +{ + return (memcg == root_mem_cgroup); +} + /* Writing them here to avoid exposing memcg's inner layout */ -#ifdef CONFIG_MEMCG_KMEM -#include <net/sock.h> -#include <net/ip.h> +#if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) -static bool mem_cgroup_is_root(struct mem_cgroup *memcg); void sock_update_memcg(struct sock *sk) { if (mem_cgroup_sockets_enabled) { @@ -461,7 +464,6 @@ void sock_release_memcg(struct sock *sk) } } -#ifdef CONFIG_INET struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg) { if (!memcg || mem_cgroup_is_root(memcg)) @@ -470,10 +472,7 @@ struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg) return &memcg->tcp_mem.cg_proto; } EXPORT_SYMBOL(tcp_proto_cgroup); -#endif /* CONFIG_INET */ -#endif /* CONFIG_MEMCG_KMEM */ -#if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) static void disarm_sock_keys(struct mem_cgroup *memcg) { if (!memcg_proto_activated(&memcg->tcp_mem.cg_proto)) @@ -1016,11 +1015,6 @@ void mem_cgroup_iter_break(struct mem_cgroup *root, iter != NULL; \ iter = mem_cgroup_iter(NULL, iter, NULL)) -static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) -{ - return (memcg == root_mem_cgroup); -} - void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) { struct mem_cgroup *memcg; diff --git a/mm/memory-failure.c b/mm/memory-failure.c index a6e2141a6610..6c5899b9034a 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -400,18 +400,21 @@ static void collect_procs_anon(struct page *page, struct list_head *to_kill, struct vm_area_struct *vma; struct task_struct *tsk; struct anon_vma *av; + pgoff_t pgoff; av = page_lock_anon_vma(page); if (av == NULL) /* Not actually mapped anymore */ return; + pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); read_lock(&tasklist_lock); for_each_process (tsk) { struct anon_vma_chain *vmac; if (!task_early_kill(tsk)) continue; - list_for_each_entry(vmac, &av->head, same_anon_vma) { + anon_vma_interval_tree_foreach(vmac, &av->rb_root, + pgoff, pgoff) { vma = vmac->vma; if (!page_mapped_in_vma(page, vma)) continue; @@ -431,7 +434,6 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill, { struct vm_area_struct *vma; struct task_struct *tsk; - struct prio_tree_iter iter; struct address_space *mapping = page->mapping; mutex_lock(&mapping->i_mmap_mutex); @@ -442,7 +444,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill, if (!task_early_kill(tsk)) continue; - vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, + vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { /* * Send early kill signal to tasks where a vma covers diff --git a/mm/memory.c b/mm/memory.c index 57361708d1a5..fb135ba4aba9 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -712,7 +712,7 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr, add_taint(TAINT_BAD_PAGE); } -static inline int is_cow_mapping(vm_flags_t flags) +static inline bool is_cow_mapping(vm_flags_t flags) { return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE; } @@ -1039,6 +1039,9 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, unsigned long next; unsigned long addr = vma->vm_start; unsigned long end = vma->vm_end; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ + bool is_cow; int ret; /* @@ -1047,7 +1050,8 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, * readonly mappings. The tradeoff is that copy_page_range is more * efficient than faulting. */ - if (!(vma->vm_flags & (VM_HUGETLB|VM_NONLINEAR|VM_PFNMAP|VM_INSERTPAGE))) { + if (!(vma->vm_flags & (VM_HUGETLB | VM_NONLINEAR | + VM_PFNMAP | VM_MIXEDMAP))) { if (!vma->anon_vma) return 0; } @@ -1055,12 +1059,12 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, if (is_vm_hugetlb_page(vma)) return copy_hugetlb_page_range(dst_mm, src_mm, vma); - if (unlikely(is_pfn_mapping(vma))) { + if (unlikely(vma->vm_flags & VM_PFNMAP)) { /* * We do not free on error cases below as remove_vma * gets called on error from higher level routine */ - ret = track_pfn_vma_copy(vma); + ret = track_pfn_copy(vma); if (ret) return ret; } @@ -1071,8 +1075,12 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, * parent mm. And a permission downgrade will only happen if * is_cow_mapping() returns true. */ - if (is_cow_mapping(vma->vm_flags)) - mmu_notifier_invalidate_range_start(src_mm, addr, end); + is_cow = is_cow_mapping(vma->vm_flags); + mmun_start = addr; + mmun_end = end; + if (is_cow) + mmu_notifier_invalidate_range_start(src_mm, mmun_start, + mmun_end); ret = 0; dst_pgd = pgd_offset(dst_mm, addr); @@ -1088,9 +1096,8 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm, } } while (dst_pgd++, src_pgd++, addr = next, addr != end); - if (is_cow_mapping(vma->vm_flags)) - mmu_notifier_invalidate_range_end(src_mm, - vma->vm_start, end); + if (is_cow) + mmu_notifier_invalidate_range_end(src_mm, mmun_start, mmun_end); return ret; } @@ -1327,8 +1334,8 @@ static void unmap_single_vma(struct mmu_gather *tlb, if (vma->vm_file) uprobe_munmap(vma, start, end); - if (unlikely(is_pfn_mapping(vma))) - untrack_pfn_vma(vma, 0, 0); + if (unlikely(vma->vm_flags & VM_PFNMAP)) + untrack_pfn(vma, 0, 0); if (start != end) { if (unlikely(is_vm_hugetlb_page(vma))) { @@ -1521,7 +1528,7 @@ struct page *follow_page(struct vm_area_struct *vma, unsigned long address, spin_unlock(&mm->page_table_lock); wait_split_huge_page(vma->anon_vma, pmd); } else { - page = follow_trans_huge_pmd(mm, address, + page = follow_trans_huge_pmd(vma, address, pmd, flags); spin_unlock(&mm->page_table_lock); goto out; @@ -1576,12 +1583,12 @@ split_fallthrough: if (page->mapping && trylock_page(page)) { lru_add_drain(); /* push cached pages to LRU */ /* - * Because we lock page here and migration is - * blocked by the pte's page reference, we need - * only check for file-cache page truncation. + * Because we lock page here, and migration is + * blocked by the pte's page reference, and we + * know the page is still mapped, we don't even + * need to check for file-cache page truncation. */ - if (page->mapping) - mlock_vma_page(page); + mlock_vma_page(page); unlock_page(page); } } @@ -2085,6 +2092,11 @@ out: * ask for a shared writable mapping! * * The page does not need to be reserved. + * + * Usually this function is called from f_op->mmap() handler + * under mm->mmap_sem write-lock, so it can change vma->vm_flags. + * Caller must set VM_MIXEDMAP on vma if it wants to call this + * function from other places, for example from page-fault handler. */ int vm_insert_page(struct vm_area_struct *vma, unsigned long addr, struct page *page) @@ -2093,7 +2105,11 @@ int vm_insert_page(struct vm_area_struct *vma, unsigned long addr, return -EFAULT; if (!page_count(page)) return -EINVAL; - vma->vm_flags |= VM_INSERTPAGE; + if (!(vma->vm_flags & VM_MIXEDMAP)) { + BUG_ON(down_read_trylock(&vma->vm_mm->mmap_sem)); + BUG_ON(vma->vm_flags & VM_PFNMAP); + vma->vm_flags |= VM_MIXEDMAP; + } return insert_page(vma, addr, page, vma->vm_page_prot); } EXPORT_SYMBOL(vm_insert_page); @@ -2132,7 +2148,7 @@ out: * @addr: target user address of this page * @pfn: source kernel pfn * - * Similar to vm_inert_page, this allows drivers to insert individual pages + * Similar to vm_insert_page, this allows drivers to insert individual pages * they've allocated into a user vma. Same comments apply. * * This function should only be called from a vm_ops->fault handler, and @@ -2162,14 +2178,11 @@ int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr, if (addr < vma->vm_start || addr >= vma->vm_end) return -EFAULT; - if (track_pfn_vma_new(vma, &pgprot, pfn, PAGE_SIZE)) + if (track_pfn_insert(vma, &pgprot, pfn)) return -EINVAL; ret = insert_pfn(vma, addr, pfn, pgprot); - if (ret) - untrack_pfn_vma(vma, pfn, PAGE_SIZE); - return ret; } EXPORT_SYMBOL(vm_insert_pfn); @@ -2290,37 +2303,30 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, * rest of the world about it: * VM_IO tells people not to look at these pages * (accesses can have side effects). - * VM_RESERVED is specified all over the place, because - * in 2.4 it kept swapout's vma scan off this vma; but - * in 2.6 the LRU scan won't even find its pages, so this - * flag means no more than count its pages in reserved_vm, - * and omit it from core dump, even when VM_IO turned off. * VM_PFNMAP tells the core MM that the base pages are just * raw PFN mappings, and do not have a "struct page" associated * with them. + * VM_DONTEXPAND + * Disable vma merging and expanding with mremap(). + * VM_DONTDUMP + * Omit vma from core dump, even when VM_IO turned off. * * There's a horrible special case to handle copy-on-write * behaviour that some programs depend on. We mark the "original" * un-COW'ed pages by matching them up with "vma->vm_pgoff". + * See vm_normal_page() for details. */ - if (addr == vma->vm_start && end == vma->vm_end) { + if (is_cow_mapping(vma->vm_flags)) { + if (addr != vma->vm_start || end != vma->vm_end) + return -EINVAL; vma->vm_pgoff = pfn; - vma->vm_flags |= VM_PFN_AT_MMAP; - } else if (is_cow_mapping(vma->vm_flags)) - return -EINVAL; - - vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; + } - err = track_pfn_vma_new(vma, &prot, pfn, PAGE_ALIGN(size)); - if (err) { - /* - * To indicate that track_pfn related cleanup is not - * needed from higher level routine calling unmap_vmas - */ - vma->vm_flags &= ~(VM_IO | VM_RESERVED | VM_PFNMAP); - vma->vm_flags &= ~VM_PFN_AT_MMAP; + err = track_pfn_remap(vma, &prot, pfn, addr, PAGE_ALIGN(size)); + if (err) return -EINVAL; - } + + vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP; BUG_ON(addr >= end); pfn -= addr >> PAGE_SHIFT; @@ -2335,7 +2341,7 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, } while (pgd++, addr = next, addr != end); if (err) - untrack_pfn_vma(vma, pfn, PAGE_ALIGN(size)); + untrack_pfn(vma, pfn, PAGE_ALIGN(size)); return err; } @@ -2516,11 +2522,14 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, spinlock_t *ptl, pte_t orig_pte) __releases(ptl) { - struct page *old_page, *new_page; + struct page *old_page, *new_page = NULL; pte_t entry; int ret = 0; int page_mkwrite = 0; struct page *dirty_page = NULL; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ + bool mmun_called = false; /* For mmu_notifiers */ old_page = vm_normal_page(vma, address, orig_pte); if (!old_page) { @@ -2698,6 +2707,11 @@ gotten: if (mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL)) goto oom_free_new; + mmun_start = address & PAGE_MASK; + mmun_end = (address & PAGE_MASK) + PAGE_SIZE; + mmun_called = true; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); + /* * Re-check the pte - we dropped the lock */ @@ -2764,6 +2778,8 @@ gotten: page_cache_release(new_page); unlock: pte_unmap_unlock(page_table, ptl); + if (mmun_called) + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); if (old_page) { /* * Don't let another task, with possibly unlocked vma, @@ -2801,14 +2817,13 @@ static void unmap_mapping_range_vma(struct vm_area_struct *vma, zap_page_range_single(vma, start_addr, end_addr - start_addr, details); } -static inline void unmap_mapping_range_tree(struct prio_tree_root *root, +static inline void unmap_mapping_range_tree(struct rb_root *root, struct zap_details *details) { struct vm_area_struct *vma; - struct prio_tree_iter iter; pgoff_t vba, vea, zba, zea; - vma_prio_tree_foreach(vma, &iter, root, + vma_interval_tree_foreach(vma, root, details->first_index, details->last_index) { vba = vma->vm_pgoff; @@ -2839,7 +2854,7 @@ static inline void unmap_mapping_range_list(struct list_head *head, * across *all* the pages in each nonlinear VMA, not just the pages * whose virtual address lies outside the file truncation point. */ - list_for_each_entry(vma, head, shared.vm_set.list) { + list_for_each_entry(vma, head, shared.nonlinear) { details->nonlinear_vma = vma; unmap_mapping_range_vma(vma, vma->vm_start, vma->vm_end, details); } @@ -2883,7 +2898,7 @@ void unmap_mapping_range(struct address_space *mapping, mutex_lock(&mapping->i_mmap_mutex); - if (unlikely(!prio_tree_empty(&mapping->i_mmap))) + if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap))) unmap_mapping_range_tree(&mapping->i_mmap, &details); if (unlikely(!list_empty(&mapping->i_mmap_nonlinear))) unmap_mapping_range_list(&mapping->i_mmap_nonlinear, &details); diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 6a5b90d0cfd7..56b758ae57d2 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -106,6 +106,7 @@ static void get_page_bootmem(unsigned long info, struct page *page, void __ref put_page_bootmem(struct page *page) { unsigned long type; + struct zone *zone; type = (unsigned long) page->lru.next; BUG_ON(type < MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE || @@ -116,6 +117,12 @@ void __ref put_page_bootmem(struct page *page) set_page_private(page, 0); INIT_LIST_HEAD(&page->lru); __free_pages_bootmem(page, 0); + + zone = page_zone(page); + zone_span_writelock(zone); + zone->present_pages++; + zone_span_writeunlock(zone); + totalram_pages++; } } @@ -362,11 +369,11 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn, BUG_ON(phys_start_pfn & ~PAGE_SECTION_MASK); BUG_ON(nr_pages % PAGES_PER_SECTION); + release_mem_region(phys_start_pfn << PAGE_SHIFT, nr_pages * PAGE_SIZE); + sections_to_remove = nr_pages / PAGES_PER_SECTION; for (i = 0; i < sections_to_remove; i++) { unsigned long pfn = phys_start_pfn + i*PAGES_PER_SECTION; - release_mem_region(pfn << PAGE_SHIFT, - PAGES_PER_SECTION << PAGE_SHIFT); ret = __remove_section(zone, __pfn_to_section(pfn)); if (ret) break; @@ -756,13 +763,6 @@ static unsigned long scan_lru_pages(unsigned long start, unsigned long end) return 0; } -static struct page * -hotremove_migrate_alloc(struct page *page, unsigned long private, int **x) -{ - /* This should be improooooved!! */ - return alloc_page(GFP_HIGHUSER_MOVABLE); -} - #define NR_OFFLINE_AT_ONCE_PAGES (256) static int do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) @@ -813,8 +813,12 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) putback_lru_pages(&source); goto out; } - /* this function returns # of failed pages */ - ret = migrate_pages(&source, hotremove_migrate_alloc, 0, + + /* + * alloc_migrate_target should be improooooved!! + * migrate_pages returns # of failed pages. + */ + ret = migrate_pages(&source, alloc_migrate_target, 0, true, MIGRATE_SYNC); if (ret) putback_lru_pages(&source); @@ -870,7 +874,7 @@ check_pages_isolated(unsigned long start_pfn, unsigned long end_pfn) return offlined; } -static int __ref offline_pages(unsigned long start_pfn, +static int __ref __offline_pages(unsigned long start_pfn, unsigned long end_pfn, unsigned long timeout) { unsigned long pfn, nr_pages, expire; @@ -970,8 +974,13 @@ repeat: init_per_zone_wmark_min(); - if (!populated_zone(zone)) + if (!populated_zone(zone)) { zone_pcp_reset(zone); + mutex_lock(&zonelists_mutex); + build_all_zonelists(NULL, NULL); + mutex_unlock(&zonelists_mutex); + } else + zone_pcp_update(zone); if (!node_present_pages(node)) { node_clear_state(node, N_HIGH_MEMORY); @@ -998,15 +1007,55 @@ out: return ret; } +int offline_pages(unsigned long start_pfn, unsigned long nr_pages) +{ + return __offline_pages(start_pfn, start_pfn + nr_pages, 120 * HZ); +} + int remove_memory(u64 start, u64 size) { + struct memory_block *mem = NULL; + struct mem_section *section; unsigned long start_pfn, end_pfn; + unsigned long pfn, section_nr; + int ret; start_pfn = PFN_DOWN(start); end_pfn = start_pfn + PFN_DOWN(size); - return offline_pages(start_pfn, end_pfn, 120 * HZ); + + for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { + section_nr = pfn_to_section_nr(pfn); + if (!present_section_nr(section_nr)) + continue; + + section = __nr_to_section(section_nr); + /* same memblock? */ + if (mem) + if ((section_nr >= mem->start_section_nr) && + (section_nr <= mem->end_section_nr)) + continue; + + mem = find_memory_block_hinted(section, mem); + if (!mem) + continue; + + ret = offline_memory_block(mem); + if (ret) { + kobject_put(&mem->dev.kobj); + return ret; + } + } + + if (mem) + kobject_put(&mem->dev.kobj); + + return 0; } #else +int offline_pages(unsigned long start_pfn, unsigned long nr_pages) +{ + return -EINVAL; +} int remove_memory(u64 start, u64 size) { return -EINVAL; diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 4ada3be6e252..0b78fb9ea65b 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -607,6 +607,42 @@ check_range(struct mm_struct *mm, unsigned long start, unsigned long end, return first; } +/* + * Apply policy to a single VMA + * This must be called with the mmap_sem held for writing. + */ +static int vma_replace_policy(struct vm_area_struct *vma, + struct mempolicy *pol) +{ + int err; + struct mempolicy *old; + struct mempolicy *new; + + pr_debug("vma %lx-%lx/%lx vm_ops %p vm_file %p set_policy %p\n", + vma->vm_start, vma->vm_end, vma->vm_pgoff, + vma->vm_ops, vma->vm_file, + vma->vm_ops ? vma->vm_ops->set_policy : NULL); + + new = mpol_dup(pol); + if (IS_ERR(new)) + return PTR_ERR(new); + + if (vma->vm_ops && vma->vm_ops->set_policy) { + err = vma->vm_ops->set_policy(vma, new); + if (err) + goto err_out; + } + + old = vma->vm_policy; + vma->vm_policy = new; /* protected by mmap_sem */ + mpol_put(old); + + return 0; + err_out: + mpol_put(new); + return err; +} + /* Step 2: apply policy to a range and do splits. */ static int mbind_range(struct mm_struct *mm, unsigned long start, unsigned long end, struct mempolicy *new_pol) @@ -655,23 +691,9 @@ static int mbind_range(struct mm_struct *mm, unsigned long start, if (err) goto out; } - - /* - * Apply policy to a single VMA. The reference counting of - * policy for vma_policy linkages has already been handled by - * vma_merge and split_vma as necessary. If this is a shared - * policy then ->set_policy will increment the reference count - * for an sp node. - */ - pr_debug("vma %lx-%lx/%lx vm_ops %p vm_file %p set_policy %p\n", - vma->vm_start, vma->vm_end, vma->vm_pgoff, - vma->vm_ops, vma->vm_file, - vma->vm_ops ? vma->vm_ops->set_policy : NULL); - if (vma->vm_ops && vma->vm_ops->set_policy) { - err = vma->vm_ops->set_policy(vma, new_pol); - if (err) - goto out; - } + err = vma_replace_policy(vma, new_pol); + if (err) + goto out; } out: @@ -924,15 +946,18 @@ static int migrate_to_node(struct mm_struct *mm, int source, int dest, nodemask_t nmask; LIST_HEAD(pagelist); int err = 0; - struct vm_area_struct *vma; nodes_clear(nmask); node_set(source, nmask); - vma = check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask, + /* + * This does not "check" the range but isolates all pages that + * need migration. Between passing in the full user address + * space range and MPOL_MF_DISCONTIG_OK, this call can not fail. + */ + VM_BUG_ON(!(flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))); + check_range(mm, mm->mmap->vm_start, mm->task_size, &nmask, flags | MPOL_MF_DISCONTIG_OK, &pagelist); - if (IS_ERR(vma)) - return PTR_ERR(vma); if (!list_empty(&pagelist)) { err = migrate_pages(&pagelist, new_node_page, dest, @@ -1530,8 +1555,18 @@ struct mempolicy *get_vma_policy(struct task_struct *task, addr); if (vpol) pol = vpol; - } else if (vma->vm_policy) + } else if (vma->vm_policy) { pol = vma->vm_policy; + + /* + * shmem_alloc_page() passes MPOL_F_SHARED policy with + * a pseudo vma whose vma->vm_ops=NULL. Take a reference + * count on these policies which will be dropped by + * mpol_cond_put() later + */ + if (mpol_needs_cond_ref(pol)) + mpol_get(pol); + } } if (!pol) pol = &default_policy; @@ -2061,7 +2096,7 @@ bool __mpol_equal(struct mempolicy *a, struct mempolicy *b) */ /* lookup first element intersecting start-end */ -/* Caller holds sp->lock */ +/* Caller holds sp->mutex */ static struct sp_node * sp_lookup(struct shared_policy *sp, unsigned long start, unsigned long end) { @@ -2125,36 +2160,50 @@ mpol_shared_policy_lookup(struct shared_policy *sp, unsigned long idx) if (!sp->root.rb_node) return NULL; - spin_lock(&sp->lock); + mutex_lock(&sp->mutex); sn = sp_lookup(sp, idx, idx+1); if (sn) { mpol_get(sn->policy); pol = sn->policy; } - spin_unlock(&sp->lock); + mutex_unlock(&sp->mutex); return pol; } +static void sp_free(struct sp_node *n) +{ + mpol_put(n->policy); + kmem_cache_free(sn_cache, n); +} + static void sp_delete(struct shared_policy *sp, struct sp_node *n) { pr_debug("deleting %lx-l%lx\n", n->start, n->end); rb_erase(&n->nd, &sp->root); - mpol_put(n->policy); - kmem_cache_free(sn_cache, n); + sp_free(n); } static struct sp_node *sp_alloc(unsigned long start, unsigned long end, struct mempolicy *pol) { - struct sp_node *n = kmem_cache_alloc(sn_cache, GFP_KERNEL); + struct sp_node *n; + struct mempolicy *newpol; + n = kmem_cache_alloc(sn_cache, GFP_KERNEL); if (!n) return NULL; + + newpol = mpol_dup(pol); + if (IS_ERR(newpol)) { + kmem_cache_free(sn_cache, n); + return NULL; + } + newpol->flags |= MPOL_F_SHARED; + n->start = start; n->end = end; - mpol_get(pol); - pol->flags |= MPOL_F_SHARED; /* for unref */ - n->policy = pol; + n->policy = newpol; + return n; } @@ -2162,10 +2211,10 @@ static struct sp_node *sp_alloc(unsigned long start, unsigned long end, static int shared_policy_replace(struct shared_policy *sp, unsigned long start, unsigned long end, struct sp_node *new) { - struct sp_node *n, *new2 = NULL; + struct sp_node *n; + int ret = 0; -restart: - spin_lock(&sp->lock); + mutex_lock(&sp->mutex); n = sp_lookup(sp, start, end); /* Take care of old policies in the same range. */ while (n && n->start < end) { @@ -2178,16 +2227,14 @@ restart: } else { /* Old policy spanning whole new range. */ if (n->end > end) { + struct sp_node *new2; + new2 = sp_alloc(end, n->end, n->policy); if (!new2) { - spin_unlock(&sp->lock); - new2 = sp_alloc(end, n->end, n->policy); - if (!new2) - return -ENOMEM; - goto restart; + ret = -ENOMEM; + goto out; } n->end = start; sp_insert(sp, new2); - new2 = NULL; break; } else n->end = start; @@ -2198,12 +2245,9 @@ restart: } if (new) sp_insert(sp, new); - spin_unlock(&sp->lock); - if (new2) { - mpol_put(new2->policy); - kmem_cache_free(sn_cache, new2); - } - return 0; +out: + mutex_unlock(&sp->mutex); + return ret; } /** @@ -2221,7 +2265,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) int ret; sp->root = RB_ROOT; /* empty tree == default mempolicy */ - spin_lock_init(&sp->lock); + mutex_init(&sp->mutex); if (mpol) { struct vm_area_struct pvma; @@ -2275,7 +2319,7 @@ int mpol_set_shared_policy(struct shared_policy *info, } err = shared_policy_replace(info, vma->vm_pgoff, vma->vm_pgoff+sz, new); if (err && new) - kmem_cache_free(sn_cache, new); + sp_free(new); return err; } @@ -2287,16 +2331,14 @@ void mpol_free_shared_policy(struct shared_policy *p) if (!p->root.rb_node) return; - spin_lock(&p->lock); + mutex_lock(&p->mutex); next = rb_first(&p->root); while (next) { n = rb_entry(next, struct sp_node, nd); next = rb_next(&n->nd); - rb_erase(&n->nd, &p->root); - mpol_put(n->policy); - kmem_cache_free(sn_cache, n); + sp_delete(p, n); } - spin_unlock(&p->lock); + mutex_unlock(&p->mutex); } /* assumes fs == KERNEL_DS */ diff --git a/mm/mlock.c b/mm/mlock.c index ef726e8aa8e9..f0b9ce572fc7 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -51,15 +51,13 @@ EXPORT_SYMBOL(can_do_mlock); /* * LRU accounting for clear_page_mlock() */ -void __clear_page_mlock(struct page *page) +void clear_page_mlock(struct page *page) { - VM_BUG_ON(!PageLocked(page)); - - if (!page->mapping) { /* truncated ? */ + if (!TestClearPageMlocked(page)) return; - } - dec_zone_page_state(page, NR_MLOCK); + mod_zone_page_state(page_zone(page), NR_MLOCK, + -hpage_nr_pages(page)); count_vm_event(UNEVICTABLE_PGCLEARED); if (!isolate_lru_page(page)) { putback_lru_page(page); @@ -81,7 +79,8 @@ void mlock_vma_page(struct page *page) BUG_ON(!PageLocked(page)); if (!TestSetPageMlocked(page)) { - inc_zone_page_state(page, NR_MLOCK); + mod_zone_page_state(page_zone(page), NR_MLOCK, + hpage_nr_pages(page)); count_vm_event(UNEVICTABLE_PGMLOCKED); if (!isolate_lru_page(page)) putback_lru_page(page); @@ -108,7 +107,8 @@ void munlock_vma_page(struct page *page) BUG_ON(!PageLocked(page)); if (TestClearPageMlocked(page)) { - dec_zone_page_state(page, NR_MLOCK); + mod_zone_page_state(page_zone(page), NR_MLOCK, + -hpage_nr_pages(page)); if (!isolate_lru_page(page)) { int ret = SWAP_AGAIN; @@ -227,7 +227,7 @@ long mlock_vma_pages_range(struct vm_area_struct *vma, if (vma->vm_flags & (VM_IO | VM_PFNMAP)) goto no_mlock; - if (!((vma->vm_flags & (VM_DONTEXPAND | VM_RESERVED)) || + if (!((vma->vm_flags & VM_DONTEXPAND) || is_vm_hugetlb_page(vma) || vma == get_gate_vma(current->mm))) { @@ -290,14 +290,7 @@ void munlock_vma_pages_range(struct vm_area_struct *vma, page = follow_page(vma, addr, FOLL_GET | FOLL_DUMP); if (page && !IS_ERR(page)) { lock_page(page); - /* - * Like in __mlock_vma_pages_range(), - * because we lock page here and migration is - * blocked by the elevated reference, we need - * only check for file-cache page truncation. - */ - if (page->mapping) - munlock_vma_page(page); + munlock_vma_page(page); unlock_page(page); put_page(page); } diff --git a/mm/mmap.c b/mm/mmap.c index 872441e81914..2d942353d681 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -51,12 +51,6 @@ static void unmap_region(struct mm_struct *mm, struct vm_area_struct *vma, struct vm_area_struct *prev, unsigned long start, unsigned long end); -/* - * WARNING: the debugging will use recursive algorithms so never enable this - * unless you know what you are doing. - */ -#undef DEBUG_MM_RB - /* description of effects of mapping type and prot in current implementation. * this is due to the limited x86 page protection hardware. The expected * behavior is in parens: @@ -199,14 +193,14 @@ static void __remove_shared_vm_struct(struct vm_area_struct *vma, flush_dcache_mmap_lock(mapping); if (unlikely(vma->vm_flags & VM_NONLINEAR)) - list_del_init(&vma->shared.vm_set.list); + list_del_init(&vma->shared.nonlinear); else - vma_prio_tree_remove(vma, &mapping->i_mmap); + vma_interval_tree_remove(vma, &mapping->i_mmap); flush_dcache_mmap_unlock(mapping); } /* - * Unlink a file-based vm structure from its prio_tree, to hide + * Unlink a file-based vm structure from its interval tree, to hide * vma from rmap and vmtruncate before freeing its page tables. */ void unlink_file_vma(struct vm_area_struct *vma) @@ -231,11 +225,8 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma) might_sleep(); if (vma->vm_ops && vma->vm_ops->close) vma->vm_ops->close(vma); - if (vma->vm_file) { + if (vma->vm_file) fput(vma->vm_file); - if (vma->vm_flags & VM_EXECUTABLE) - removed_exe_file_vma(vma->vm_mm); - } mpol_put(vma_policy(vma)); kmem_cache_free(vm_area_cachep, vma); return next; @@ -306,7 +297,7 @@ out: return retval; } -#ifdef DEBUG_MM_RB +#ifdef CONFIG_DEBUG_VM_RB static int browse_rb(struct rb_root *root) { int i = 0, j; @@ -340,9 +331,12 @@ void validate_mm(struct mm_struct *mm) { int bug = 0; int i = 0; - struct vm_area_struct *tmp = mm->mmap; - while (tmp) { - tmp = tmp->vm_next; + struct vm_area_struct *vma = mm->mmap; + while (vma) { + struct anon_vma_chain *avc; + list_for_each_entry(avc, &vma->anon_vma_chain, same_vma) + anon_vma_interval_tree_verify(avc); + vma = vma->vm_next; i++; } if (i != mm->map_count) @@ -356,17 +350,46 @@ void validate_mm(struct mm_struct *mm) #define validate_mm(mm) do { } while (0) #endif -static struct vm_area_struct * -find_vma_prepare(struct mm_struct *mm, unsigned long addr, - struct vm_area_struct **pprev, struct rb_node ***rb_link, - struct rb_node ** rb_parent) +/* + * vma has some anon_vma assigned, and is already inserted on that + * anon_vma's interval trees. + * + * Before updating the vma's vm_start / vm_end / vm_pgoff fields, the + * vma must be removed from the anon_vma's interval trees using + * anon_vma_interval_tree_pre_update_vma(). + * + * After the update, the vma will be reinserted using + * anon_vma_interval_tree_post_update_vma(). + * + * The entire update must be protected by exclusive mmap_sem and by + * the root anon_vma's mutex. + */ +static inline void +anon_vma_interval_tree_pre_update_vma(struct vm_area_struct *vma) { - struct vm_area_struct * vma; - struct rb_node ** __rb_link, * __rb_parent, * rb_prev; + struct anon_vma_chain *avc; + + list_for_each_entry(avc, &vma->anon_vma_chain, same_vma) + anon_vma_interval_tree_remove(avc, &avc->anon_vma->rb_root); +} + +static inline void +anon_vma_interval_tree_post_update_vma(struct vm_area_struct *vma) +{ + struct anon_vma_chain *avc; + + list_for_each_entry(avc, &vma->anon_vma_chain, same_vma) + anon_vma_interval_tree_insert(avc, &avc->anon_vma->rb_root); +} + +static int find_vma_links(struct mm_struct *mm, unsigned long addr, + unsigned long end, struct vm_area_struct **pprev, + struct rb_node ***rb_link, struct rb_node **rb_parent) +{ + struct rb_node **__rb_link, *__rb_parent, *rb_prev; __rb_link = &mm->mm_rb.rb_node; rb_prev = __rb_parent = NULL; - vma = NULL; while (*__rb_link) { struct vm_area_struct *vma_tmp; @@ -375,9 +398,9 @@ find_vma_prepare(struct mm_struct *mm, unsigned long addr, vma_tmp = rb_entry(__rb_parent, struct vm_area_struct, vm_rb); if (vma_tmp->vm_end > addr) { - vma = vma_tmp; - if (vma_tmp->vm_start <= addr) - break; + /* Fail if an existing vma overlaps the area */ + if (vma_tmp->vm_start < end) + return -ENOMEM; __rb_link = &__rb_parent->rb_left; } else { rb_prev = __rb_parent; @@ -390,7 +413,7 @@ find_vma_prepare(struct mm_struct *mm, unsigned long addr, *pprev = rb_entry(rb_prev, struct vm_area_struct, vm_rb); *rb_link = __rb_link; *rb_parent = __rb_parent; - return vma; + return 0; } void __vma_link_rb(struct mm_struct *mm, struct vm_area_struct *vma, @@ -417,7 +440,7 @@ static void __vma_link_file(struct vm_area_struct *vma) if (unlikely(vma->vm_flags & VM_NONLINEAR)) vma_nonlinear_insert(vma, &mapping->i_mmap_nonlinear); else - vma_prio_tree_insert(vma, &mapping->i_mmap); + vma_interval_tree_insert(vma, &mapping->i_mmap); flush_dcache_mmap_unlock(mapping); } } @@ -455,15 +478,16 @@ static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma, /* * Helper for vma_adjust() in the split_vma insert case: insert a vma into the - * mm's list and rbtree. It has already been inserted into the prio_tree. + * mm's list and rbtree. It has already been inserted into the interval tree. */ static void __insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma) { - struct vm_area_struct *__vma, *prev; + struct vm_area_struct *prev; struct rb_node **rb_link, *rb_parent; - __vma = find_vma_prepare(mm, vma->vm_start,&prev, &rb_link, &rb_parent); - BUG_ON(__vma && __vma->vm_start < vma->vm_end); + if (find_vma_links(mm, vma->vm_start, vma->vm_end, + &prev, &rb_link, &rb_parent)) + BUG(); __vma_link(mm, vma, prev, rb_link, rb_parent); mm->map_count++; } @@ -496,7 +520,7 @@ int vma_adjust(struct vm_area_struct *vma, unsigned long start, struct vm_area_struct *next = vma->vm_next; struct vm_area_struct *importer = NULL; struct address_space *mapping = NULL; - struct prio_tree_root *root = NULL; + struct rb_root *root = NULL; struct anon_vma *anon_vma = NULL; struct file *file = vma->vm_file; long adjust_next = 0; @@ -559,7 +583,7 @@ again: remove_next = 1 + (end > next->vm_end); mutex_lock(&mapping->i_mmap_mutex); if (insert) { /* - * Put into prio_tree now, so instantiated pages + * Put into interval tree now, so instantiated pages * are visible to arm/parisc __flush_dcache_page * throughout; but we cannot insert into address * space until vma start or end is updated. @@ -570,22 +594,23 @@ again: remove_next = 1 + (end > next->vm_end); vma_adjust_trans_huge(vma, start, end, adjust_next); - /* - * When changing only vma->vm_end, we don't really need anon_vma - * lock. This is a fairly rare case by itself, but the anon_vma - * lock may be shared between many sibling processes. Skipping - * the lock for brk adjustments makes a difference sometimes. - */ - if (vma->anon_vma && (importer || start != vma->vm_start)) { - anon_vma = vma->anon_vma; + anon_vma = vma->anon_vma; + if (!anon_vma && adjust_next) + anon_vma = next->anon_vma; + if (anon_vma) { + VM_BUG_ON(adjust_next && next->anon_vma && + anon_vma != next->anon_vma); anon_vma_lock(anon_vma); + anon_vma_interval_tree_pre_update_vma(vma); + if (adjust_next) + anon_vma_interval_tree_pre_update_vma(next); } if (root) { flush_dcache_mmap_lock(mapping); - vma_prio_tree_remove(vma, root); + vma_interval_tree_remove(vma, root); if (adjust_next) - vma_prio_tree_remove(next, root); + vma_interval_tree_remove(next, root); } vma->vm_start = start; @@ -598,8 +623,8 @@ again: remove_next = 1 + (end > next->vm_end); if (root) { if (adjust_next) - vma_prio_tree_insert(next, root); - vma_prio_tree_insert(vma, root); + vma_interval_tree_insert(next, root); + vma_interval_tree_insert(vma, root); flush_dcache_mmap_unlock(mapping); } @@ -620,8 +645,12 @@ again: remove_next = 1 + (end > next->vm_end); __insert_vm_struct(mm, insert); } - if (anon_vma) + if (anon_vma) { + anon_vma_interval_tree_post_update_vma(vma); + if (adjust_next) + anon_vma_interval_tree_post_update_vma(next); anon_vma_unlock(anon_vma); + } if (mapping) mutex_unlock(&mapping->i_mmap_mutex); @@ -636,8 +665,6 @@ again: remove_next = 1 + (end > next->vm_end); if (file) { uprobe_munmap(next, next->vm_start, next->vm_end); fput(file); - if (next->vm_flags & VM_EXECUTABLE) - removed_exe_file_vma(mm); } if (next->anon_vma) anon_vma_merge(vma, next); @@ -669,8 +696,7 @@ again: remove_next = 1 + (end > next->vm_end); static inline int is_mergeable_vma(struct vm_area_struct *vma, struct file *file, unsigned long vm_flags) { - /* VM_CAN_NONLINEAR may get set later by f_op->mmap() */ - if ((vma->vm_flags ^ vm_flags) & ~VM_CAN_NONLINEAR) + if (vma->vm_flags ^ vm_flags) return 0; if (vma->vm_file != file) return 0; @@ -951,8 +977,6 @@ void vm_stat_account(struct mm_struct *mm, unsigned long flags, mm->exec_vm += pages; } else if (flags & stack_flags) mm->stack_vm += pages; - if (flags & (VM_RESERVED|VM_IO)) - mm->reserved_vm += pages; } #endif /* CONFIG_PROC_FS */ @@ -1190,7 +1214,7 @@ int vma_wants_writenotify(struct vm_area_struct *vma) return 0; /* Specialty mapping? */ - if (vm_flags & (VM_PFNMAP|VM_INSERTPAGE)) + if (vm_flags & VM_PFNMAP) return 0; /* Can the mapping track the dirty pages? */ @@ -1229,8 +1253,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, /* Clear old maps */ error = -ENOMEM; munmap_back: - vma = find_vma_prepare(mm, addr, &prev, &rb_link, &rb_parent); - if (vma && vma->vm_start < addr + len) { + if (find_vma_links(mm, addr, addr + len, &prev, &rb_link, &rb_parent)) { if (do_munmap(mm, addr, len)) return -ENOMEM; goto munmap_back; @@ -1305,8 +1328,6 @@ munmap_back: error = file->f_op->mmap(file, vma); if (error) goto unmap_and_free_vma; - if (vm_flags & VM_EXECUTABLE) - added_exe_file_vma(mm); /* Can addr have changed?? * @@ -1757,13 +1778,16 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address) if (vma->vm_pgoff + (size >> PAGE_SHIFT) >= vma->vm_pgoff) { error = acct_stack_growth(vma, size, grow); if (!error) { + anon_vma_interval_tree_pre_update_vma(vma); vma->vm_end = address; + anon_vma_interval_tree_post_update_vma(vma); perf_event_mmap(vma); } } } vma_unlock_anon_vma(vma); khugepaged_enter_vma_merge(vma); + validate_mm(vma->vm_mm); return error; } #endif /* CONFIG_STACK_GROWSUP || CONFIG_IA64 */ @@ -1807,14 +1831,17 @@ int expand_downwards(struct vm_area_struct *vma, if (grow <= vma->vm_pgoff) { error = acct_stack_growth(vma, size, grow); if (!error) { + anon_vma_interval_tree_pre_update_vma(vma); vma->vm_start = address; vma->vm_pgoff -= grow; + anon_vma_interval_tree_post_update_vma(vma); perf_event_mmap(vma); } } } vma_unlock_anon_vma(vma); khugepaged_enter_vma_merge(vma); + validate_mm(vma->vm_mm); return error; } @@ -1988,11 +2015,8 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma, if (anon_vma_clone(new, vma)) goto out_free_mpol; - if (new->vm_file) { + if (new->vm_file) get_file(new->vm_file); - if (vma->vm_flags & VM_EXECUTABLE) - added_exe_file_vma(mm); - } if (new->vm_ops && new->vm_ops->open) new->vm_ops->open(new); @@ -2010,11 +2034,8 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma, /* Clean everything up if vma_adjust failed. */ if (new->vm_ops && new->vm_ops->close) new->vm_ops->close(new); - if (new->vm_file) { - if (vma->vm_flags & VM_EXECUTABLE) - removed_exe_file_vma(mm); + if (new->vm_file) fput(new->vm_file); - } unlink_anon_vmas(new); out_free_mpol: mpol_put(pol); @@ -2199,8 +2220,7 @@ static unsigned long do_brk(unsigned long addr, unsigned long len) * Clear old maps. this also does some error checking for us */ munmap_back: - vma = find_vma_prepare(mm, addr, &prev, &rb_link, &rb_parent); - if (vma && vma->vm_start < addr + len) { + if (find_vma_links(mm, addr, addr + len, &prev, &rb_link, &rb_parent)) { if (do_munmap(mm, addr, len)) return -ENOMEM; goto munmap_back; @@ -2314,10 +2334,10 @@ void exit_mmap(struct mm_struct *mm) * and into the inode's i_mmap tree. If vm_file is non-NULL * then i_mmap_mutex is taken here. */ -int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma) +int insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma) { - struct vm_area_struct * __vma, * prev; - struct rb_node ** rb_link, * rb_parent; + struct vm_area_struct *prev; + struct rb_node **rb_link, *rb_parent; /* * The vm_pgoff of a purely anonymous vma should be irrelevant @@ -2335,8 +2355,8 @@ int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma) BUG_ON(vma->anon_vma); vma->vm_pgoff = vma->vm_start >> PAGE_SHIFT; } - __vma = find_vma_prepare(mm,vma->vm_start,&prev,&rb_link,&rb_parent); - if (__vma && __vma->vm_start < vma->vm_end) + if (find_vma_links(mm, vma->vm_start, vma->vm_end, + &prev, &rb_link, &rb_parent)) return -ENOMEM; if ((vma->vm_flags & VM_ACCOUNT) && security_vm_enough_memory_mm(mm, vma_pages(vma))) @@ -2351,7 +2371,8 @@ int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma) * prior to moving page table entries, to effect an mremap move. */ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, - unsigned long addr, unsigned long len, pgoff_t pgoff) + unsigned long addr, unsigned long len, pgoff_t pgoff, + bool *need_rmap_locks) { struct vm_area_struct *vma = *vmap; unsigned long vma_start = vma->vm_start; @@ -2370,7 +2391,8 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, faulted_in_anon_vma = false; } - find_vma_prepare(mm, addr, &prev, &rb_link, &rb_parent); + if (find_vma_links(mm, addr, addr + len, &prev, &rb_link, &rb_parent)) + return NULL; /* should never get here */ new_vma = vma_merge(mm, prev, addr, addr + len, vma->vm_flags, vma->anon_vma, vma->vm_file, pgoff, vma_policy(vma)); if (new_vma) { @@ -2392,32 +2414,29 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, * linear if there are no pages mapped yet. */ VM_BUG_ON(faulted_in_anon_vma); - *vmap = new_vma; - } else - anon_vma_moveto_tail(new_vma); + *vmap = vma = new_vma; + } + *need_rmap_locks = (new_vma->vm_pgoff <= vma->vm_pgoff); } else { new_vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL); if (new_vma) { *new_vma = *vma; + new_vma->vm_start = addr; + new_vma->vm_end = addr + len; + new_vma->vm_pgoff = pgoff; pol = mpol_dup(vma_policy(vma)); if (IS_ERR(pol)) goto out_free_vma; + vma_set_policy(new_vma, pol); INIT_LIST_HEAD(&new_vma->anon_vma_chain); if (anon_vma_clone(new_vma, vma)) goto out_free_mempol; - vma_set_policy(new_vma, pol); - new_vma->vm_start = addr; - new_vma->vm_end = addr + len; - new_vma->vm_pgoff = pgoff; - if (new_vma->vm_file) { + if (new_vma->vm_file) get_file(new_vma->vm_file); - - if (vma->vm_flags & VM_EXECUTABLE) - added_exe_file_vma(mm); - } if (new_vma->vm_ops && new_vma->vm_ops->open) new_vma->vm_ops->open(new_vma); vma_link(mm, new_vma, prev, rb_link, rb_parent); + *need_rmap_locks = false; } } return new_vma; @@ -2535,7 +2554,7 @@ static DEFINE_MUTEX(mm_all_locks_mutex); static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma) { - if (!test_bit(0, (unsigned long *) &anon_vma->root->head.next)) { + if (!test_bit(0, (unsigned long *) &anon_vma->root->rb_root.rb_node)) { /* * The LSB of head.next can't change from under us * because we hold the mm_all_locks_mutex. @@ -2551,7 +2570,7 @@ static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma) * anon_vma->root->mutex. */ if (__test_and_set_bit(0, (unsigned long *) - &anon_vma->root->head.next)) + &anon_vma->root->rb_root.rb_node)) BUG(); } } @@ -2592,7 +2611,7 @@ static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping) * A single task can't take more than one mm_take_all_locks() in a row * or it would deadlock. * - * The LSB in anon_vma->head.next and the AS_MM_ALL_LOCKS bitflag in + * The LSB in anon_vma->rb_root.rb_node and the AS_MM_ALL_LOCKS bitflag in * mapping->flags avoid to take the same lock twice, if more than one * vma in this mm is backed by the same anon_vma or address_space. * @@ -2639,13 +2658,13 @@ out_unlock: static void vm_unlock_anon_vma(struct anon_vma *anon_vma) { - if (test_bit(0, (unsigned long *) &anon_vma->root->head.next)) { + if (test_bit(0, (unsigned long *) &anon_vma->root->rb_root.rb_node)) { /* * The LSB of head.next can't change to 0 from under * us because we hold the mm_all_locks_mutex. * * We must however clear the bitflag before unlocking - * the vma so the users using the anon_vma->head will + * the vma so the users using the anon_vma->rb_root will * never see our bitflag. * * No need of atomic instructions here, head.next @@ -2653,7 +2672,7 @@ static void vm_unlock_anon_vma(struct anon_vma *anon_vma) * anon_vma->root->mutex. */ if (!__test_and_clear_bit(0, (unsigned long *) - &anon_vma->root->head.next)) + &anon_vma->root->rb_root.rb_node)) BUG(); anon_vma_unlock(anon_vma); } diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c index 862b60822d9f..479a1e751a73 100644 --- a/mm/mmu_notifier.c +++ b/mm/mmu_notifier.c @@ -14,10 +14,14 @@ #include <linux/export.h> #include <linux/mm.h> #include <linux/err.h> +#include <linux/srcu.h> #include <linux/rcupdate.h> #include <linux/sched.h> #include <linux/slab.h> +/* global SRCU for all MMs */ +static struct srcu_struct srcu; + /* * This function can't run concurrently against mmu_notifier_register * because mm->mm_users > 0 during mmu_notifier_register and exit_mmap @@ -25,8 +29,8 @@ * in parallel despite there being no task using this mm any more, * through the vmas outside of the exit_mmap context, such as with * vmtruncate. This serializes against mmu_notifier_unregister with - * the mmu_notifier_mm->lock in addition to RCU and it serializes - * against the other mmu notifiers with RCU. struct mmu_notifier_mm + * the mmu_notifier_mm->lock in addition to SRCU and it serializes + * against the other mmu notifiers with SRCU. struct mmu_notifier_mm * can't go away from under us as exit_mmap holds an mm_count pin * itself. */ @@ -34,12 +38,13 @@ void __mmu_notifier_release(struct mm_struct *mm) { struct mmu_notifier *mn; struct hlist_node *n; + int id; /* - * RCU here will block mmu_notifier_unregister until + * SRCU here will block mmu_notifier_unregister until * ->release returns. */ - rcu_read_lock(); + id = srcu_read_lock(&srcu); hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) /* * if ->release runs before mmu_notifier_unregister it @@ -50,7 +55,7 @@ void __mmu_notifier_release(struct mm_struct *mm) */ if (mn->ops->release) mn->ops->release(mn, mm); - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); spin_lock(&mm->mmu_notifier_mm->lock); while (unlikely(!hlist_empty(&mm->mmu_notifier_mm->list))) { @@ -68,7 +73,7 @@ void __mmu_notifier_release(struct mm_struct *mm) spin_unlock(&mm->mmu_notifier_mm->lock); /* - * synchronize_rcu here prevents mmu_notifier_release to + * synchronize_srcu here prevents mmu_notifier_release to * return to exit_mmap (which would proceed freeing all pages * in the mm) until the ->release method returns, if it was * invoked by mmu_notifier_unregister. @@ -76,7 +81,7 @@ void __mmu_notifier_release(struct mm_struct *mm) * The mmu_notifier_mm can't go away from under us because one * mm_count is hold by exit_mmap. */ - synchronize_rcu(); + synchronize_srcu(&srcu); } /* @@ -89,14 +94,14 @@ int __mmu_notifier_clear_flush_young(struct mm_struct *mm, { struct mmu_notifier *mn; struct hlist_node *n; - int young = 0; + int young = 0, id; - rcu_read_lock(); + id = srcu_read_lock(&srcu); hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) { if (mn->ops->clear_flush_young) young |= mn->ops->clear_flush_young(mn, mm, address); } - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); return young; } @@ -106,9 +111,9 @@ int __mmu_notifier_test_young(struct mm_struct *mm, { struct mmu_notifier *mn; struct hlist_node *n; - int young = 0; + int young = 0, id; - rcu_read_lock(); + id = srcu_read_lock(&srcu); hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) { if (mn->ops->test_young) { young = mn->ops->test_young(mn, mm, address); @@ -116,7 +121,7 @@ int __mmu_notifier_test_young(struct mm_struct *mm, break; } } - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); return young; } @@ -126,19 +131,14 @@ void __mmu_notifier_change_pte(struct mm_struct *mm, unsigned long address, { struct mmu_notifier *mn; struct hlist_node *n; + int id; - rcu_read_lock(); + id = srcu_read_lock(&srcu); hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) { if (mn->ops->change_pte) mn->ops->change_pte(mn, mm, address, pte); - /* - * Some drivers don't have change_pte, - * so we must call invalidate_page in that case. - */ - else if (mn->ops->invalidate_page) - mn->ops->invalidate_page(mn, mm, address); } - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); } void __mmu_notifier_invalidate_page(struct mm_struct *mm, @@ -146,13 +146,14 @@ void __mmu_notifier_invalidate_page(struct mm_struct *mm, { struct mmu_notifier *mn; struct hlist_node *n; + int id; - rcu_read_lock(); + id = srcu_read_lock(&srcu); hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) { if (mn->ops->invalidate_page) mn->ops->invalidate_page(mn, mm, address); } - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); } void __mmu_notifier_invalidate_range_start(struct mm_struct *mm, @@ -160,13 +161,14 @@ void __mmu_notifier_invalidate_range_start(struct mm_struct *mm, { struct mmu_notifier *mn; struct hlist_node *n; + int id; - rcu_read_lock(); + id = srcu_read_lock(&srcu); hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) { if (mn->ops->invalidate_range_start) mn->ops->invalidate_range_start(mn, mm, start, end); } - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); } void __mmu_notifier_invalidate_range_end(struct mm_struct *mm, @@ -174,13 +176,14 @@ void __mmu_notifier_invalidate_range_end(struct mm_struct *mm, { struct mmu_notifier *mn; struct hlist_node *n; + int id; - rcu_read_lock(); + id = srcu_read_lock(&srcu); hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) { if (mn->ops->invalidate_range_end) mn->ops->invalidate_range_end(mn, mm, start, end); } - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); } static int do_mmu_notifier_register(struct mmu_notifier *mn, @@ -192,22 +195,29 @@ static int do_mmu_notifier_register(struct mmu_notifier *mn, BUG_ON(atomic_read(&mm->mm_users) <= 0); - ret = -ENOMEM; - mmu_notifier_mm = kmalloc(sizeof(struct mmu_notifier_mm), GFP_KERNEL); - if (unlikely(!mmu_notifier_mm)) - goto out; + /* + * Verify that mmu_notifier_init() already run and the global srcu is + * initialized. + */ + BUG_ON(!srcu.per_cpu_ref); if (take_mmap_sem) down_write(&mm->mmap_sem); ret = mm_take_all_locks(mm); if (unlikely(ret)) - goto out_cleanup; + goto out; if (!mm_has_notifiers(mm)) { + mmu_notifier_mm = kmalloc(sizeof(struct mmu_notifier_mm), + GFP_KERNEL); + if (unlikely(!mmu_notifier_mm)) { + ret = -ENOMEM; + goto out_of_mem; + } INIT_HLIST_HEAD(&mmu_notifier_mm->list); spin_lock_init(&mmu_notifier_mm->lock); + mm->mmu_notifier_mm = mmu_notifier_mm; - mmu_notifier_mm = NULL; } atomic_inc(&mm->mm_count); @@ -223,13 +233,12 @@ static int do_mmu_notifier_register(struct mmu_notifier *mn, hlist_add_head(&mn->hlist, &mm->mmu_notifier_mm->list); spin_unlock(&mm->mmu_notifier_mm->lock); +out_of_mem: mm_drop_all_locks(mm); -out_cleanup: +out: if (take_mmap_sem) up_write(&mm->mmap_sem); - /* kfree() does nothing if mmu_notifier_mm is NULL */ - kfree(mmu_notifier_mm); -out: + BUG_ON(atomic_read(&mm->mm_users) <= 0); return ret; } @@ -274,8 +283,8 @@ void __mmu_notifier_mm_destroy(struct mm_struct *mm) /* * This releases the mm_count pin automatically and frees the mm * structure if it was the last user of it. It serializes against - * running mmu notifiers with RCU and against mmu_notifier_unregister - * with the unregister lock + RCU. All sptes must be dropped before + * running mmu notifiers with SRCU and against mmu_notifier_unregister + * with the unregister lock + SRCU. All sptes must be dropped before * calling mmu_notifier_unregister. ->release or any other notifier * method may be invoked concurrently with mmu_notifier_unregister, * and only after mmu_notifier_unregister returned we're guaranteed @@ -287,11 +296,12 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm) if (!hlist_unhashed(&mn->hlist)) { /* - * RCU here will force exit_mmap to wait ->release to finish + * SRCU here will force exit_mmap to wait ->release to finish * before freeing the pages. */ - rcu_read_lock(); + int id; + id = srcu_read_lock(&srcu); /* * exit_mmap will block in mmu_notifier_release to * guarantee ->release is called before freeing the @@ -299,7 +309,7 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm) */ if (mn->ops->release) mn->ops->release(mn, mm); - rcu_read_unlock(); + srcu_read_unlock(&srcu, id); spin_lock(&mm->mmu_notifier_mm->lock); hlist_del_rcu(&mn->hlist); @@ -310,10 +320,17 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm) * Wait any running method to finish, of course including * ->release if it was run by mmu_notifier_relase instead of us. */ - synchronize_rcu(); + synchronize_srcu(&srcu); BUG_ON(atomic_read(&mm->mm_count) <= 0); mmdrop(mm); } EXPORT_SYMBOL_GPL(mmu_notifier_unregister); + +static int __init mmu_notifier_init(void) +{ + return init_srcu_struct(&srcu); +} + +module_init(mmu_notifier_init); diff --git a/mm/mremap.c b/mm/mremap.c index cc06d0e48d05..1b61c2d3307a 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -71,22 +71,41 @@ static pmd_t *alloc_new_pmd(struct mm_struct *mm, struct vm_area_struct *vma, static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd, unsigned long old_addr, unsigned long old_end, struct vm_area_struct *new_vma, pmd_t *new_pmd, - unsigned long new_addr) + unsigned long new_addr, bool need_rmap_locks) { struct address_space *mapping = NULL; + struct anon_vma *anon_vma = NULL; struct mm_struct *mm = vma->vm_mm; pte_t *old_pte, *new_pte, pte; spinlock_t *old_ptl, *new_ptl; - if (vma->vm_file) { - /* - * Subtle point from Rajesh Venkatasubramanian: before - * moving file-based ptes, we must lock truncate_pagecache - * out, since it might clean the dst vma before the src vma, - * and we propagate stale pages into the dst afterward. - */ - mapping = vma->vm_file->f_mapping; - mutex_lock(&mapping->i_mmap_mutex); + /* + * When need_rmap_locks is true, we take the i_mmap_mutex and anon_vma + * locks to ensure that rmap will always observe either the old or the + * new ptes. This is the easiest way to avoid races with + * truncate_pagecache(), page migration, etc... + * + * When need_rmap_locks is false, we use other ways to avoid + * such races: + * + * - During exec() shift_arg_pages(), we use a specially tagged vma + * which rmap call sites look for using is_vma_temporary_stack(). + * + * - During mremap(), new_vma is often known to be placed after vma + * in rmap traversal order. This ensures rmap will always observe + * either the old pte, or the new pte, or both (the page table locks + * serialize access to individual ptes, but only rmap traversal + * order guarantees that we won't miss both the old and new ptes). + */ + if (need_rmap_locks) { + if (vma->vm_file) { + mapping = vma->vm_file->f_mapping; + mutex_lock(&mapping->i_mmap_mutex); + } + if (vma->anon_vma) { + anon_vma = vma->anon_vma; + anon_vma_lock(anon_vma); + } } /* @@ -114,6 +133,8 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd, spin_unlock(new_ptl); pte_unmap(new_pte - 1); pte_unmap_unlock(old_pte - 1, old_ptl); + if (anon_vma) + anon_vma_unlock(anon_vma); if (mapping) mutex_unlock(&mapping->i_mmap_mutex); } @@ -122,16 +143,21 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd, unsigned long move_page_tables(struct vm_area_struct *vma, unsigned long old_addr, struct vm_area_struct *new_vma, - unsigned long new_addr, unsigned long len) + unsigned long new_addr, unsigned long len, + bool need_rmap_locks) { unsigned long extent, next, old_end; pmd_t *old_pmd, *new_pmd; bool need_flush = false; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ old_end = old_addr + len; flush_cache_range(vma, old_addr, old_end); - mmu_notifier_invalidate_range_start(vma->vm_mm, old_addr, old_end); + mmun_start = old_addr; + mmun_end = old_end; + mmu_notifier_invalidate_range_start(vma->vm_mm, mmun_start, mmun_end); for (; old_addr < old_end; old_addr += extent, new_addr += extent) { cond_resched(); @@ -169,13 +195,13 @@ unsigned long move_page_tables(struct vm_area_struct *vma, if (extent > LATENCY_LIMIT) extent = LATENCY_LIMIT; move_ptes(vma, old_pmd, old_addr, old_addr + extent, - new_vma, new_pmd, new_addr); + new_vma, new_pmd, new_addr, need_rmap_locks); need_flush = true; } if (likely(need_flush)) flush_tlb_range(vma, old_end-len, old_addr); - mmu_notifier_invalidate_range_end(vma->vm_mm, old_end-len, old_end); + mmu_notifier_invalidate_range_end(vma->vm_mm, mmun_start, mmun_end); return len + old_addr - old_end; /* how much done */ } @@ -193,6 +219,7 @@ static unsigned long move_vma(struct vm_area_struct *vma, unsigned long hiwater_vm; int split = 0; int err; + bool need_rmap_locks; /* * We'd prefer to avoid failure later on in do_munmap: @@ -214,27 +241,21 @@ static unsigned long move_vma(struct vm_area_struct *vma, return err; new_pgoff = vma->vm_pgoff + ((old_addr - vma->vm_start) >> PAGE_SHIFT); - new_vma = copy_vma(&vma, new_addr, new_len, new_pgoff); + new_vma = copy_vma(&vma, new_addr, new_len, new_pgoff, + &need_rmap_locks); if (!new_vma) return -ENOMEM; - moved_len = move_page_tables(vma, old_addr, new_vma, new_addr, old_len); + moved_len = move_page_tables(vma, old_addr, new_vma, new_addr, old_len, + need_rmap_locks); if (moved_len < old_len) { /* - * Before moving the page tables from the new vma to - * the old vma, we need to be sure the old vma is - * queued after new vma in the same_anon_vma list to - * prevent SMP races with rmap_walk (that could lead - * rmap_walk to miss some page table). - */ - anon_vma_moveto_tail(vma); - - /* * On error, move entries back from new area to old, * which will succeed since page tables still there, * and then proceed to unmap new area instead of old. */ - move_page_tables(new_vma, new_addr, vma, old_addr, moved_len); + move_page_tables(new_vma, new_addr, vma, old_addr, moved_len, + true); vma = new_vma; old_len = new_len; old_addr = new_addr; diff --git a/mm/nobootmem.c b/mm/nobootmem.c index 405573010f99..714d5d650470 100644 --- a/mm/nobootmem.c +++ b/mm/nobootmem.c @@ -116,6 +116,8 @@ static unsigned long __init __free_memory_core(phys_addr_t start, return 0; __free_pages_memory(start_pfn, end_pfn); + fixup_zone_present_pages(pfn_to_nid(start >> PAGE_SHIFT), + start_pfn, end_pfn); return end_pfn - start_pfn; } @@ -126,6 +128,7 @@ unsigned long __init free_low_memory_core_early(int nodeid) phys_addr_t start, end, size; u64 i; + reset_zone_present_pages(); for_each_free_mem_range(i, MAX_NUMNODES, &start, &end, NULL) count += __free_memory_core(start, end); @@ -162,8 +165,6 @@ unsigned long __init free_all_bootmem(void) * We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id * because in some case like Node0 doesn't have RAM installed * low ram will be on Node1 - * Use MAX_NUMNODES will make sure all ranges in early_node_map[] - * will be used instead of only Node0 related */ return free_low_memory_core_early(MAX_NUMNODES); } diff --git a/mm/nommu.c b/mm/nommu.c index dee2ff89fd58..45131b41bcdb 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -698,7 +698,7 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma) mutex_lock(&mapping->i_mmap_mutex); flush_dcache_mmap_lock(mapping); - vma_prio_tree_insert(vma, &mapping->i_mmap); + vma_interval_tree_insert(vma, &mapping->i_mmap); flush_dcache_mmap_unlock(mapping); mutex_unlock(&mapping->i_mmap_mutex); } @@ -764,7 +764,7 @@ static void delete_vma_from_mm(struct vm_area_struct *vma) mutex_lock(&mapping->i_mmap_mutex); flush_dcache_mmap_lock(mapping); - vma_prio_tree_remove(vma, &mapping->i_mmap); + vma_interval_tree_remove(vma, &mapping->i_mmap); flush_dcache_mmap_unlock(mapping); mutex_unlock(&mapping->i_mmap_mutex); } @@ -789,11 +789,8 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma) kenter("%p", vma); if (vma->vm_ops && vma->vm_ops->close) vma->vm_ops->close(vma); - if (vma->vm_file) { + if (vma->vm_file) fput(vma->vm_file); - if (vma->vm_flags & VM_EXECUTABLE) - removed_exe_file_vma(mm); - } put_nommu_region(vma->vm_region); kmem_cache_free(vm_area_cachep, vma); } @@ -1284,10 +1281,6 @@ unsigned long do_mmap_pgoff(struct file *file, if (file) { region->vm_file = get_file(file); vma->vm_file = get_file(file); - if (vm_flags & VM_EXECUTABLE) { - added_exe_file_vma(current->mm); - vma->vm_mm = current->mm; - } } down_write(&nommu_region_sem); @@ -1440,8 +1433,6 @@ error: kmem_cache_free(vm_region_jar, region); if (vma->vm_file) fput(vma->vm_file); - if (vma->vm_flags & VM_EXECUTABLE) - removed_exe_file_vma(vma->vm_mm); kmem_cache_free(vm_area_cachep, vma); kleave(" = %d", ret); return ret; @@ -1820,7 +1811,7 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, if (addr != (pfn << PAGE_SHIFT)) return -EINVAL; - vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; + vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP; return 0; } EXPORT_SYMBOL(remap_pfn_range); @@ -1961,6 +1952,14 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) } EXPORT_SYMBOL(filemap_fault); +int generic_file_remap_pages(struct vm_area_struct *vma, unsigned long addr, + unsigned long size, pgoff_t pgoff) +{ + BUG(); + return 0; +} +EXPORT_SYMBOL(generic_file_remap_pages); + static int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm, unsigned long addr, void *buf, int len, int write) { @@ -2045,7 +2044,6 @@ int nommu_shrink_inode_mappings(struct inode *inode, size_t size, size_t newsize) { struct vm_area_struct *vma; - struct prio_tree_iter iter; struct vm_region *region; pgoff_t low, high; size_t r_size, r_top; @@ -2057,8 +2055,7 @@ int nommu_shrink_inode_mappings(struct inode *inode, size_t size, mutex_lock(&inode->i_mapping->i_mmap_mutex); /* search for VMAs that fall within the dead zone */ - vma_prio_tree_foreach(vma, &iter, &inode->i_mapping->i_mmap, - low, high) { + vma_interval_tree_foreach(vma, &inode->i_mapping->i_mmap, low, high) { /* found one - only interested if it's shared out of the page * cache */ if (vma->vm_flags & VM_SHARED) { @@ -2074,8 +2071,8 @@ int nommu_shrink_inode_mappings(struct inode *inode, size_t size, * we don't check for any regions that start beyond the EOF as there * shouldn't be any */ - vma_prio_tree_foreach(vma, &iter, &inode->i_mapping->i_mmap, - 0, ULONG_MAX) { + vma_interval_tree_foreach(vma, &inode->i_mapping->i_mmap, + 0, ULONG_MAX) { if (!(vma->vm_flags & VM_SHARED)) continue; diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 198600861638..79e0f3e24831 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -428,8 +428,8 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order, { task_lock(current); pr_warning("%s invoked oom-killer: gfp_mask=0x%x, order=%d, " - "oom_adj=%d, oom_score_adj=%d\n", - current->comm, gfp_mask, order, current->signal->oom_adj, + "oom_score_adj=%d\n", + current->comm, gfp_mask, order, current->signal->oom_score_adj); cpuset_print_task_mems_allowed(current); task_unlock(current); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c13ea7538891..bb90971182bd 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -558,7 +558,8 @@ static inline void __free_one_page(struct page *page, if (page_is_guard(buddy)) { clear_page_guard_flag(buddy); set_page_private(page, 0); - __mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order); + __mod_zone_freepage_state(zone, 1 << order, + migratetype); } else { list_del(&buddy->lru); zone->free_area[order].nr_free--; @@ -597,17 +598,6 @@ out: zone->free_area[order].nr_free++; } -/* - * free_page_mlock() -- clean up attempts to free and mlocked() page. - * Page should not be on lru, so no need to fix that up. - * free_pages_check() will verify... - */ -static inline void free_page_mlock(struct page *page) -{ - __dec_zone_page_state(page, NR_MLOCK); - __count_vm_event(UNEVICTABLE_MLOCKFREED); -} - static inline int free_pages_check(struct page *page) { if (unlikely(page_mapcount(page) | @@ -668,12 +658,17 @@ static void free_pcppages_bulk(struct zone *zone, int count, batch_free = to_free; do { + int mt; /* migratetype of the to-be-freed page */ + page = list_entry(list->prev, struct page, lru); /* must delete as __free_one_page list manipulates */ list_del(&page->lru); + mt = get_freepage_migratetype(page); /* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */ - __free_one_page(page, zone, 0, page_private(page)); - trace_mm_page_pcpu_drain(page, 0, page_private(page)); + __free_one_page(page, zone, 0, mt); + trace_mm_page_pcpu_drain(page, 0, mt); + if (is_migrate_cma(mt)) + __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, 1); } while (--to_free && --batch_free && !list_empty(list)); } __mod_zone_page_state(zone, NR_FREE_PAGES, count); @@ -688,7 +683,8 @@ static void free_one_page(struct zone *zone, struct page *page, int order, zone->pages_scanned = 0; __free_one_page(page, zone, order, migratetype); - __mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order); + if (unlikely(migratetype != MIGRATE_ISOLATE)) + __mod_zone_freepage_state(zone, 1 << order, migratetype); spin_unlock(&zone->lock); } @@ -721,17 +717,16 @@ static bool free_pages_prepare(struct page *page, unsigned int order) static void __free_pages_ok(struct page *page, unsigned int order) { unsigned long flags; - int wasMlocked = __TestClearPageMlocked(page); + int migratetype; if (!free_pages_prepare(page, order)) return; local_irq_save(flags); - if (unlikely(wasMlocked)) - free_page_mlock(page); __count_vm_events(PGFREE, 1 << order); - free_one_page(page_zone(page), page, order, - get_pageblock_migratetype(page)); + migratetype = get_pageblock_migratetype(page); + set_freepage_migratetype(page, migratetype); + free_one_page(page_zone(page), page, order, migratetype); local_irq_restore(flags); } @@ -811,7 +806,8 @@ static inline void expand(struct zone *zone, struct page *page, set_page_guard_flag(&page[size]); set_page_private(&page[size], high); /* Guard pages are not available for any usage */ - __mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << high)); + __mod_zone_freepage_state(zone, -(1 << high), + migratetype); continue; } #endif @@ -915,7 +911,7 @@ static int fallbacks[MIGRATE_TYPES][4] = { * Note that start_page and end_pages are not aligned on a pageblock * boundary. If alignment is required, use move_freepages_block() */ -static int move_freepages(struct zone *zone, +int move_freepages(struct zone *zone, struct page *start_page, struct page *end_page, int migratetype) { @@ -951,6 +947,7 @@ static int move_freepages(struct zone *zone, order = page_order(page); list_move(&page->lru, &zone->free_area[order].free_list[migratetype]); + set_freepage_migratetype(page, migratetype); page += 1 << order; pages_moved += 1 << order; } @@ -1135,8 +1132,11 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, if (!is_migrate_cma(mt) && mt != MIGRATE_ISOLATE) mt = migratetype; } - set_page_private(page, mt); + set_freepage_migratetype(page, mt); list = &page->lru; + if (is_migrate_cma(mt)) + __mod_zone_page_state(zone, NR_FREE_CMA_PAGES, + -(1 << order)); } __mod_zone_page_state(zone, NR_FREE_PAGES, -(i << order)); spin_unlock(&zone->lock); @@ -1296,16 +1296,13 @@ void free_hot_cold_page(struct page *page, int cold) struct per_cpu_pages *pcp; unsigned long flags; int migratetype; - int wasMlocked = __TestClearPageMlocked(page); if (!free_pages_prepare(page, 0)) return; migratetype = get_pageblock_migratetype(page); - set_page_private(page, migratetype); + set_freepage_migratetype(page, migratetype); local_irq_save(flags); - if (unlikely(wasMlocked)) - free_page_mlock(page); __count_vm_event(PGFREE); /* @@ -1380,20 +1377,16 @@ void split_page(struct page *page, unsigned int order) } /* - * Similar to split_page except the page is already free. As this is only - * being used for migration, the migratetype of the block also changes. - * As this is called with interrupts disabled, the caller is responsible - * for calling arch_alloc_page() and kernel_map_page() after interrupts - * are enabled. - * - * Note: this is probably too low level an operation for use in drivers. - * Please consult with lkml before using this in your driver. + * Similar to the split_page family of functions except that the page + * required at the given order and being isolated now to prevent races + * with parallel allocators */ -int split_free_page(struct page *page) +int capture_free_page(struct page *page, int alloc_order, int migratetype) { unsigned int order; unsigned long watermark; struct zone *zone; + int mt; BUG_ON(!PageBuddy(page)); @@ -1409,12 +1402,16 @@ int split_free_page(struct page *page) list_del(&page->lru); zone->free_area[order].nr_free--; rmv_page_order(page); - __mod_zone_page_state(zone, NR_FREE_PAGES, -(1UL << order)); - /* Split into individual pages */ - set_page_refcounted(page); - split_page(page, order); + mt = get_pageblock_migratetype(page); + if (unlikely(mt != MIGRATE_ISOLATE)) + __mod_zone_freepage_state(zone, -(1UL << order), mt); + if (alloc_order != order) + expand(zone, page, alloc_order, order, + &zone->free_area[order], migratetype); + + /* Set the pageblock if the captured page is at least a pageblock */ if (order >= pageblock_order - 1) { struct page *endpage = page + (1 << order) - 1; for (; page < endpage; page += pageblock_nr_pages) { @@ -1425,7 +1422,35 @@ int split_free_page(struct page *page) } } - return 1 << order; + return 1UL << order; +} + +/* + * Similar to split_page except the page is already free. As this is only + * being used for migration, the migratetype of the block also changes. + * As this is called with interrupts disabled, the caller is responsible + * for calling arch_alloc_page() and kernel_map_page() after interrupts + * are enabled. + * + * Note: this is probably too low level an operation for use in drivers. + * Please consult with lkml before using this in your driver. + */ +int split_free_page(struct page *page) +{ + unsigned int order; + int nr_pages; + + BUG_ON(!PageBuddy(page)); + order = page_order(page); + + nr_pages = capture_free_page(page, order, 0); + if (!nr_pages) + return 0; + + /* Split into individual pages */ + set_page_refcounted(page); + split_page(page, order); + return nr_pages; } /* @@ -1484,7 +1509,8 @@ again: spin_unlock(&zone->lock); if (!page) goto failed; - __mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << order)); + __mod_zone_freepage_state(zone, -(1 << order), + get_pageblock_migratetype(page)); } __count_zone_vm_events(PGALLOC, zone, 1 << order); @@ -1501,19 +1527,6 @@ failed: return NULL; } -/* The ALLOC_WMARK bits are used as an index to zone->watermark */ -#define ALLOC_WMARK_MIN WMARK_MIN -#define ALLOC_WMARK_LOW WMARK_LOW -#define ALLOC_WMARK_HIGH WMARK_HIGH -#define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */ - -/* Mask to get the watermark bits */ -#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1) - -#define ALLOC_HARDER 0x10 /* try to alloc harder */ -#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */ -#define ALLOC_CPUSET 0x40 /* check for correct cpuset */ - #ifdef CONFIG_FAIL_PAGE_ALLOC static struct { @@ -1608,7 +1621,11 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark, min -= min / 2; if (alloc_flags & ALLOC_HARDER) min -= min / 4; - +#ifdef CONFIG_CMA + /* If allocation can't use CMA areas don't use free CMA pages */ + if (!(alloc_flags & ALLOC_CMA)) + free_pages -= zone_page_state(z, NR_FREE_CMA_PAGES); +#endif if (free_pages <= min + lowmem_reserve) return false; for (o = 0; o < order; o++) { @@ -1782,6 +1799,22 @@ static void zlc_clear_zones_full(struct zonelist *zonelist) bitmap_zero(zlc->fullzones, MAX_ZONES_PER_ZONELIST); } +static bool zone_allows_reclaim(struct zone *local_zone, struct zone *zone) +{ + return node_isset(local_zone->node, zone->zone_pgdat->reclaim_nodes); +} + +static void __paginginit init_zone_allows_reclaim(int nid) +{ + int i; + + for_each_online_node(i) + if (node_distance(nid, i) <= RECLAIM_DISTANCE) { + node_set(i, NODE_DATA(nid)->reclaim_nodes); + zone_reclaim_mode = 1; + } +} + #else /* CONFIG_NUMA */ static nodemask_t *zlc_setup(struct zonelist *zonelist, int alloc_flags) @@ -1802,6 +1835,15 @@ static void zlc_mark_zone_full(struct zonelist *zonelist, struct zoneref *z) static void zlc_clear_zones_full(struct zonelist *zonelist) { } + +static bool zone_allows_reclaim(struct zone *local_zone, struct zone *zone) +{ + return true; +} + +static inline void init_zone_allows_reclaim(int nid) +{ +} #endif /* CONFIG_NUMA */ /* @@ -1886,7 +1928,8 @@ zonelist_scan: did_zlc_setup = 1; } - if (zone_reclaim_mode == 0) + if (zone_reclaim_mode == 0 || + !zone_allows_reclaim(preferred_zone, zone)) goto this_zone_full; /* @@ -2105,7 +2148,7 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order, bool *contended_compaction, bool *deferred_compaction, unsigned long *did_some_progress) { - struct page *page; + struct page *page = NULL; if (!order) return NULL; @@ -2118,10 +2161,16 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order, current->flags |= PF_MEMALLOC; *did_some_progress = try_to_compact_pages(zonelist, order, gfp_mask, nodemask, sync_migration, - contended_compaction); + contended_compaction, &page); current->flags &= ~PF_MEMALLOC; - if (*did_some_progress != COMPACT_SKIPPED) { + /* If compaction captured a page, prep and use it */ + if (page) { + prep_new_page(page, order, gfp_mask); + goto got_page; + } + + if (*did_some_progress != COMPACT_SKIPPED) { /* Page migration frees to the PCP lists but we want merging */ drain_pages(get_cpu()); put_cpu(); @@ -2131,6 +2180,8 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order, alloc_flags & ~ALLOC_NO_WATERMARKS, preferred_zone, migratetype); if (page) { +got_page: + preferred_zone->compact_blockskip_flush = false; preferred_zone->compact_considered = 0; preferred_zone->compact_defer_shift = 0; if (order >= preferred_zone->compact_order_failed) @@ -2315,7 +2366,10 @@ gfp_to_alloc_flags(gfp_t gfp_mask) unlikely(test_thread_flag(TIF_MEMDIE)))) alloc_flags |= ALLOC_NO_WATERMARKS; } - +#ifdef CONFIG_CMA + if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE) + alloc_flags |= ALLOC_CMA; +#endif return alloc_flags; } @@ -2362,9 +2416,8 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order, goto nopage; restart: - if (!(gfp_mask & __GFP_NO_KSWAPD)) - wake_all_kswapd(order, zonelist, high_zoneidx, - zone_idx(preferred_zone)); + wake_all_kswapd(order, zonelist, high_zoneidx, + zone_idx(preferred_zone)); /* * OK, we're below the kswapd watermark and have kicked background @@ -2441,7 +2494,7 @@ rebalance: * system then fail the allocation instead of entering direct reclaim. */ if ((deferred_compaction || contended_compaction) && - (gfp_mask & __GFP_NO_KSWAPD)) + (gfp_mask & (__GFP_MOVABLE|__GFP_REPEAT)) == __GFP_MOVABLE) goto nopage; /* Try direct reclaim and then allocating */ @@ -2541,6 +2594,7 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, struct page *page = NULL; int migratetype = allocflags_to_migratetype(gfp_mask); unsigned int cpuset_mems_cookie; + int alloc_flags = ALLOC_WMARK_LOW|ALLOC_CPUSET; gfp_mask &= gfp_allowed_mask; @@ -2569,9 +2623,13 @@ retry_cpuset: if (!preferred_zone) goto out; +#ifdef CONFIG_CMA + if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE) + alloc_flags |= ALLOC_CMA; +#endif /* First allocation attempt */ page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, nodemask, order, - zonelist, high_zoneidx, ALLOC_WMARK_LOW|ALLOC_CPUSET, + zonelist, high_zoneidx, alloc_flags, preferred_zone, migratetype); if (unlikely(!page)) page = __alloc_pages_slowpath(gfp_mask, order, @@ -2852,7 +2910,8 @@ void show_free_areas(unsigned int filter) " unevictable:%lu" " dirty:%lu writeback:%lu unstable:%lu\n" " free:%lu slab_reclaimable:%lu slab_unreclaimable:%lu\n" - " mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n", + " mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n" + " free_cma:%lu\n", global_page_state(NR_ACTIVE_ANON), global_page_state(NR_INACTIVE_ANON), global_page_state(NR_ISOLATED_ANON), @@ -2869,7 +2928,8 @@ void show_free_areas(unsigned int filter) global_page_state(NR_FILE_MAPPED), global_page_state(NR_SHMEM), global_page_state(NR_PAGETABLE), - global_page_state(NR_BOUNCE)); + global_page_state(NR_BOUNCE), + global_page_state(NR_FREE_CMA_PAGES)); for_each_populated_zone(zone) { int i; @@ -2901,6 +2961,7 @@ void show_free_areas(unsigned int filter) " pagetables:%lukB" " unstable:%lukB" " bounce:%lukB" + " free_cma:%lukB" " writeback_tmp:%lukB" " pages_scanned:%lu" " all_unreclaimable? %s" @@ -2930,6 +2991,7 @@ void show_free_areas(unsigned int filter) K(zone_page_state(zone, NR_PAGETABLE)), K(zone_page_state(zone, NR_UNSTABLE_NFS)), K(zone_page_state(zone, NR_BOUNCE)), + K(zone_page_state(zone, NR_FREE_CMA_PAGES)), K(zone_page_state(zone, NR_WRITEBACK_TEMP)), zone->pages_scanned, (zone->all_unreclaimable ? "yes" : "no") @@ -3328,21 +3390,13 @@ static void build_zonelists(pg_data_t *pgdat) j = 0; while ((node = find_next_best_node(local_node, &used_mask)) >= 0) { - int distance = node_distance(local_node, node); - - /* - * If another node is sufficiently far away then it is better - * to reclaim pages in a zone before going off node. - */ - if (distance > RECLAIM_DISTANCE) - zone_reclaim_mode = 1; - /* * We don't want to pressure a particular node. * So adding penalty to the first node in same * distance group to make it round-robin. */ - if (distance != node_distance(local_node, prev_node)) + if (node_distance(local_node, node) != + node_distance(local_node, prev_node)) node_load[node] = load; prev_node = node; @@ -4438,11 +4492,6 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat, zone->spanned_pages = size; zone->present_pages = realsize; -#if defined CONFIG_COMPACTION || defined CONFIG_CMA - zone->compact_cached_free_pfn = zone->zone_start_pfn + - zone->spanned_pages; - zone->compact_cached_free_pfn &= ~(pageblock_nr_pages-1); -#endif #ifdef CONFIG_NUMA zone->node = nid; zone->min_unmapped_pages = (realsize*sysctl_min_unmapped_ratio) @@ -4521,6 +4570,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size, pgdat->node_id = nid; pgdat->node_start_pfn = node_start_pfn; + init_zone_allows_reclaim(nid); calculate_node_totalpages(pgdat, zones_size, zholes_size); alloc_node_mem_map(pgdat); @@ -4879,7 +4929,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn) zone_movable_pfn[i] << PAGE_SHIFT); } - /* Print out the early_node_map[] */ + /* Print out the early node map */ printk("Early memory node ranges\n"); for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid) printk(" node %3d: [mem %#010lx-%#010lx]\n", nid, @@ -5619,47 +5669,28 @@ static unsigned long pfn_max_align_up(unsigned long pfn) pageblock_nr_pages)); } -static struct page * -__alloc_contig_migrate_alloc(struct page *page, unsigned long private, - int **resultp) -{ - gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE; - - if (PageHighMem(page)) - gfp_mask |= __GFP_HIGHMEM; - - return alloc_page(gfp_mask); -} - /* [start, end) must belong to a single zone. */ -static int __alloc_contig_migrate_range(unsigned long start, unsigned long end) +static int __alloc_contig_migrate_range(struct compact_control *cc, + unsigned long start, unsigned long end) { /* This function is based on compact_zone() from compaction.c. */ - + unsigned long nr_reclaimed; unsigned long pfn = start; unsigned int tries = 0; int ret = 0; - struct compact_control cc = { - .nr_migratepages = 0, - .order = -1, - .zone = page_zone(pfn_to_page(start)), - .sync = true, - }; - INIT_LIST_HEAD(&cc.migratepages); - migrate_prep_local(); - while (pfn < end || !list_empty(&cc.migratepages)) { + while (pfn < end || !list_empty(&cc->migratepages)) { if (fatal_signal_pending(current)) { ret = -EINTR; break; } - if (list_empty(&cc.migratepages)) { - cc.nr_migratepages = 0; - pfn = isolate_migratepages_range(cc.zone, &cc, - pfn, end); + if (list_empty(&cc->migratepages)) { + cc->nr_migratepages = 0; + pfn = isolate_migratepages_range(cc->zone, cc, + pfn, end, true); if (!pfn) { ret = -EINTR; break; @@ -5670,12 +5701,16 @@ static int __alloc_contig_migrate_range(unsigned long start, unsigned long end) break; } - ret = migrate_pages(&cc.migratepages, - __alloc_contig_migrate_alloc, + nr_reclaimed = reclaim_clean_pages_from_list(cc->zone, + &cc->migratepages); + cc->nr_migratepages -= nr_reclaimed; + + ret = migrate_pages(&cc->migratepages, + alloc_migrate_target, 0, false, MIGRATE_SYNC); } - putback_lru_pages(&cc.migratepages); + putback_lru_pages(&cc->migratepages); return ret > 0 ? 0 : ret; } @@ -5754,6 +5789,15 @@ int alloc_contig_range(unsigned long start, unsigned long end, unsigned long outer_start, outer_end; int ret = 0, order; + struct compact_control cc = { + .nr_migratepages = 0, + .order = -1, + .zone = page_zone(pfn_to_page(start)), + .sync = true, + .ignore_skip_hint = true, + }; + INIT_LIST_HEAD(&cc.migratepages); + /* * What we do here is we mark all pageblocks in range as * MIGRATE_ISOLATE. Because pageblock and max order pages may @@ -5783,7 +5827,7 @@ int alloc_contig_range(unsigned long start, unsigned long end, if (ret) goto done; - ret = __alloc_contig_migrate_range(start, end); + ret = __alloc_contig_migrate_range(&cc, start, end); if (ret) goto done; @@ -5832,7 +5876,7 @@ int alloc_contig_range(unsigned long start, unsigned long end, __reclaim_pages(zone, GFP_HIGHUSER_MOVABLE, end-start); /* Grab isolated pages from freelists. */ - outer_end = isolate_freepages_range(outer_start, end); + outer_end = isolate_freepages_range(&cc, outer_start, end); if (!outer_end) { ret = -EBUSY; goto done; @@ -5874,6 +5918,7 @@ static int __meminit __zone_pcp_update(void *data) local_irq_save(flags); if (pcp->count > 0) free_pcppages_bulk(zone, pcp->count, pcp); + drain_zonestat(zone, pset); setup_pageset(pset, batch); local_irq_restore(flags); } @@ -5890,10 +5935,16 @@ void __meminit zone_pcp_update(struct zone *zone) void zone_pcp_reset(struct zone *zone) { unsigned long flags; + int cpu; + struct per_cpu_pageset *pset; /* avoid races with drain_pages() */ local_irq_save(flags); if (zone->pageset != &boot_pageset) { + for_each_online_cpu(cpu) { + pset = per_cpu_ptr(zone->pageset, cpu); + drain_zonestat(zone, pset); + } free_percpu(zone->pageset); zone->pageset = &boot_pageset; } @@ -6047,3 +6098,37 @@ void dump_page(struct page *page) dump_page_flags(page->flags); mem_cgroup_print_bad_page(page); } + +/* reset zone->present_pages */ +void reset_zone_present_pages(void) +{ + struct zone *z; + int i, nid; + + for_each_node_state(nid, N_HIGH_MEMORY) { + for (i = 0; i < MAX_NR_ZONES; i++) { + z = NODE_DATA(nid)->node_zones + i; + z->present_pages = 0; + } + } +} + +/* calculate zone's present pages in buddy system */ +void fixup_zone_present_pages(int nid, unsigned long start_pfn, + unsigned long end_pfn) +{ + struct zone *z; + unsigned long zone_start_pfn, zone_end_pfn; + int i; + + for (i = 0; i < MAX_NR_ZONES; i++) { + z = NODE_DATA(nid)->node_zones + i; + zone_start_pfn = z->zone_start_pfn; + zone_end_pfn = zone_start_pfn + z->spanned_pages; + + /* if the two regions intersect */ + if (!(zone_start_pfn >= end_pfn || zone_end_pfn <= start_pfn)) + z->present_pages += min(end_pfn, zone_end_pfn) - + max(start_pfn, zone_start_pfn); + } +} diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 247d1f175739..f2f5b4818e94 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -76,8 +76,13 @@ int set_migratetype_isolate(struct page *page) out: if (!ret) { + unsigned long nr_pages; + int migratetype = get_pageblock_migratetype(page); + set_pageblock_isolate(page); - move_freepages_block(zone, page, MIGRATE_ISOLATE); + nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE); + + __mod_zone_freepage_state(zone, -nr_pages, migratetype); } spin_unlock_irqrestore(&zone->lock, flags); @@ -89,12 +94,14 @@ out: void unset_migratetype_isolate(struct page *page, unsigned migratetype) { struct zone *zone; - unsigned long flags; + unsigned long flags, nr_pages; + zone = page_zone(page); spin_lock_irqsave(&zone->lock, flags); if (get_pageblock_migratetype(page) != MIGRATE_ISOLATE) goto out; - move_freepages_block(zone, page, migratetype); + nr_pages = move_freepages_block(zone, page, migratetype); + __mod_zone_freepage_state(zone, nr_pages, migratetype); restore_pageblock_isolate(page, migratetype); out: spin_unlock_irqrestore(&zone->lock, flags); @@ -193,10 +200,25 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn) continue; } page = pfn_to_page(pfn); - if (PageBuddy(page)) + if (PageBuddy(page)) { + /* + * If race between isolatation and allocation happens, + * some free pages could be in MIGRATE_MOVABLE list + * although pageblock's migratation type of the page + * is MIGRATE_ISOLATE. Catch it and move the page into + * MIGRATE_ISOLATE list. + */ + if (get_freepage_migratetype(page) != MIGRATE_ISOLATE) { + struct page *end_page; + + end_page = page + (1 << page_order(page)) - 1; + move_freepages(page_zone(page), page, end_page, + MIGRATE_ISOLATE); + } pfn += 1 << page_order(page); + } else if (page_count(page) == 0 && - page_private(page) == MIGRATE_ISOLATE) + get_freepage_migratetype(page) == MIGRATE_ISOLATE) pfn += 1; else break; @@ -233,3 +255,14 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn) spin_unlock_irqrestore(&zone->lock, flags); return ret ? 0 : -EBUSY; } + +struct page *alloc_migrate_target(struct page *page, unsigned long private, + int **resultp) +{ + gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE; + + if (PageHighMem(page)) + gfp_mask |= __GFP_HIGHMEM; + + return alloc_page(gfp_mask); +} diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c index 74c0ddaa6fa0..e642627da6b7 100644 --- a/mm/pgtable-generic.c +++ b/mm/pgtable-generic.c @@ -120,3 +120,53 @@ void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address, } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #endif + +#ifndef __HAVE_ARCH_PGTABLE_DEPOSIT +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +void pgtable_trans_huge_deposit(struct mm_struct *mm, pgtable_t pgtable) +{ + assert_spin_locked(&mm->page_table_lock); + + /* FIFO */ + if (!mm->pmd_huge_pte) + INIT_LIST_HEAD(&pgtable->lru); + else + list_add(&pgtable->lru, &mm->pmd_huge_pte->lru); + mm->pmd_huge_pte = pgtable; +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#endif + +#ifndef __HAVE_ARCH_PGTABLE_WITHDRAW +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +/* no "address" argument so destroys page coloring of some arch */ +pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm) +{ + pgtable_t pgtable; + + assert_spin_locked(&mm->page_table_lock); + + /* FIFO */ + pgtable = mm->pmd_huge_pte; + if (list_empty(&pgtable->lru)) + mm->pmd_huge_pte = NULL; + else { + mm->pmd_huge_pte = list_entry(pgtable->lru.next, + struct page, lru); + list_del(&pgtable->lru); + } + return pgtable; +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#endif + +#ifndef __HAVE_ARCH_PMDP_INVALIDATE +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, + pmd_t *pmdp) +{ + set_pmd_at(vma->vm_mm, address, pmdp, pmd_mknotpresent(*pmdp)); + flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE); +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#endif diff --git a/mm/prio_tree.c b/mm/prio_tree.c deleted file mode 100644 index 799dcfd7cd8c..000000000000 --- a/mm/prio_tree.c +++ /dev/null @@ -1,208 +0,0 @@ -/* - * mm/prio_tree.c - priority search tree for mapping->i_mmap - * - * Copyright (C) 2004, Rajesh Venkatasubramanian <vrajesh@umich.edu> - * - * This file is released under the GPL v2. - * - * Based on the radix priority search tree proposed by Edward M. McCreight - * SIAM Journal of Computing, vol. 14, no.2, pages 257-276, May 1985 - * - * 02Feb2004 Initial version - */ - -#include <linux/mm.h> -#include <linux/prio_tree.h> -#include <linux/prefetch.h> - -/* - * See lib/prio_tree.c for details on the general radix priority search tree - * code. - */ - -/* - * The following #defines are mirrored from lib/prio_tree.c. They're only used - * for debugging, and should be removed (along with the debugging code using - * them) when switching also VMAs to the regular prio_tree code. - */ - -#define RADIX_INDEX(vma) ((vma)->vm_pgoff) -#define VMA_SIZE(vma) (((vma)->vm_end - (vma)->vm_start) >> PAGE_SHIFT) -/* avoid overflow */ -#define HEAP_INDEX(vma) ((vma)->vm_pgoff + (VMA_SIZE(vma) - 1)) - -/* - * Radix priority search tree for address_space->i_mmap - * - * For each vma that map a unique set of file pages i.e., unique [radix_index, - * heap_index] value, we have a corresponding priority search tree node. If - * multiple vmas have identical [radix_index, heap_index] value, then one of - * them is used as a tree node and others are stored in a vm_set list. The tree - * node points to the first vma (head) of the list using vm_set.head. - * - * prio_tree_root - * | - * A vm_set.head - * / \ / - * L R -> H-I-J-K-M-N-O-P-Q-S - * ^ ^ <-- vm_set.list --> - * tree nodes - * - * We need some way to identify whether a vma is a tree node, head of a vm_set - * list, or just a member of a vm_set list. We cannot use vm_flags to store - * such information. The reason is, in the above figure, it is possible that - * vm_flags' of R and H are covered by the different mmap_sems. When R is - * removed under R->mmap_sem, H replaces R as a tree node. Since we do not hold - * H->mmap_sem, we cannot use H->vm_flags for marking that H is a tree node now. - * That's why some trick involving shared.vm_set.parent is used for identifying - * tree nodes and list head nodes. - * - * vma radix priority search tree node rules: - * - * vma->shared.vm_set.parent != NULL ==> a tree node - * vma->shared.vm_set.head != NULL ==> list of others mapping same range - * vma->shared.vm_set.head == NULL ==> no others map the same range - * - * vma->shared.vm_set.parent == NULL - * vma->shared.vm_set.head != NULL ==> list head of vmas mapping same range - * vma->shared.vm_set.head == NULL ==> a list node - */ - -/* - * Add a new vma known to map the same set of pages as the old vma: - * useful for fork's dup_mmap as well as vma_prio_tree_insert below. - * Note that it just happens to work correctly on i_mmap_nonlinear too. - */ -void vma_prio_tree_add(struct vm_area_struct *vma, struct vm_area_struct *old) -{ - /* Leave these BUG_ONs till prio_tree patch stabilizes */ - BUG_ON(RADIX_INDEX(vma) != RADIX_INDEX(old)); - BUG_ON(HEAP_INDEX(vma) != HEAP_INDEX(old)); - - vma->shared.vm_set.head = NULL; - vma->shared.vm_set.parent = NULL; - - if (!old->shared.vm_set.parent) - list_add(&vma->shared.vm_set.list, - &old->shared.vm_set.list); - else if (old->shared.vm_set.head) - list_add_tail(&vma->shared.vm_set.list, - &old->shared.vm_set.head->shared.vm_set.list); - else { - INIT_LIST_HEAD(&vma->shared.vm_set.list); - vma->shared.vm_set.head = old; - old->shared.vm_set.head = vma; - } -} - -void vma_prio_tree_insert(struct vm_area_struct *vma, - struct prio_tree_root *root) -{ - struct prio_tree_node *ptr; - struct vm_area_struct *old; - - vma->shared.vm_set.head = NULL; - - ptr = raw_prio_tree_insert(root, &vma->shared.prio_tree_node); - if (ptr != (struct prio_tree_node *) &vma->shared.prio_tree_node) { - old = prio_tree_entry(ptr, struct vm_area_struct, - shared.prio_tree_node); - vma_prio_tree_add(vma, old); - } -} - -void vma_prio_tree_remove(struct vm_area_struct *vma, - struct prio_tree_root *root) -{ - struct vm_area_struct *node, *head, *new_head; - - if (!vma->shared.vm_set.head) { - if (!vma->shared.vm_set.parent) - list_del_init(&vma->shared.vm_set.list); - else - raw_prio_tree_remove(root, &vma->shared.prio_tree_node); - } else { - /* Leave this BUG_ON till prio_tree patch stabilizes */ - BUG_ON(vma->shared.vm_set.head->shared.vm_set.head != vma); - if (vma->shared.vm_set.parent) { - head = vma->shared.vm_set.head; - if (!list_empty(&head->shared.vm_set.list)) { - new_head = list_entry( - head->shared.vm_set.list.next, - struct vm_area_struct, - shared.vm_set.list); - list_del_init(&head->shared.vm_set.list); - } else - new_head = NULL; - - raw_prio_tree_replace(root, &vma->shared.prio_tree_node, - &head->shared.prio_tree_node); - head->shared.vm_set.head = new_head; - if (new_head) - new_head->shared.vm_set.head = head; - - } else { - node = vma->shared.vm_set.head; - if (!list_empty(&vma->shared.vm_set.list)) { - new_head = list_entry( - vma->shared.vm_set.list.next, - struct vm_area_struct, - shared.vm_set.list); - list_del_init(&vma->shared.vm_set.list); - node->shared.vm_set.head = new_head; - new_head->shared.vm_set.head = node; - } else - node->shared.vm_set.head = NULL; - } - } -} - -/* - * Helper function to enumerate vmas that map a given file page or a set of - * contiguous file pages. The function returns vmas that at least map a single - * page in the given range of contiguous file pages. - */ -struct vm_area_struct *vma_prio_tree_next(struct vm_area_struct *vma, - struct prio_tree_iter *iter) -{ - struct prio_tree_node *ptr; - struct vm_area_struct *next; - - if (!vma) { - /* - * First call is with NULL vma - */ - ptr = prio_tree_next(iter); - if (ptr) { - next = prio_tree_entry(ptr, struct vm_area_struct, - shared.prio_tree_node); - prefetch(next->shared.vm_set.head); - return next; - } else - return NULL; - } - - if (vma->shared.vm_set.parent) { - if (vma->shared.vm_set.head) { - next = vma->shared.vm_set.head; - prefetch(next->shared.vm_set.list.next); - return next; - } - } else { - next = list_entry(vma->shared.vm_set.list.next, - struct vm_area_struct, shared.vm_set.list); - if (!next->shared.vm_set.head) { - prefetch(next->shared.vm_set.list.next); - return next; - } - } - - ptr = prio_tree_next(iter); - if (ptr) { - next = prio_tree_entry(ptr, struct vm_area_struct, - shared.prio_tree_node); - prefetch(next->shared.vm_set.head); - return next; - } else - return NULL; -} diff --git a/mm/rmap.c b/mm/rmap.c index 0f3b7cda2a24..7df7984d476c 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -127,12 +127,7 @@ static void anon_vma_chain_link(struct vm_area_struct *vma, avc->vma = vma; avc->anon_vma = anon_vma; list_add(&avc->same_vma, &vma->anon_vma_chain); - - /* - * It's critical to add new vmas to the tail of the anon_vma, - * see comment in huge_memory.c:__split_huge_page(). - */ - list_add_tail(&avc->same_anon_vma, &anon_vma->head); + anon_vma_interval_tree_insert(avc, &anon_vma->rb_root); } /** @@ -269,51 +264,6 @@ int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src) } /* - * Some rmap walk that needs to find all ptes/hugepmds without false - * negatives (like migrate and split_huge_page) running concurrent - * with operations that copy or move pagetables (like mremap() and - * fork()) to be safe. They depend on the anon_vma "same_anon_vma" - * list to be in a certain order: the dst_vma must be placed after the - * src_vma in the list. This is always guaranteed by fork() but - * mremap() needs to call this function to enforce it in case the - * dst_vma isn't newly allocated and chained with the anon_vma_clone() - * function but just an extension of a pre-existing vma through - * vma_merge. - * - * NOTE: the same_anon_vma list can still be changed by other - * processes while mremap runs because mremap doesn't hold the - * anon_vma mutex to prevent modifications to the list while it - * runs. All we need to enforce is that the relative order of this - * process vmas isn't changing (we don't care about other vmas - * order). Each vma corresponds to an anon_vma_chain structure so - * there's no risk that other processes calling anon_vma_moveto_tail() - * and changing the same_anon_vma list under mremap() will screw with - * the relative order of this process vmas in the list, because we - * they can't alter the order of any vma that belongs to this - * process. And there can't be another anon_vma_moveto_tail() running - * concurrently with mremap() coming from this process because we hold - * the mmap_sem for the whole mremap(). fork() ordering dependency - * also shouldn't be affected because fork() only cares that the - * parent vmas are placed in the list before the child vmas and - * anon_vma_moveto_tail() won't reorder vmas from either the fork() - * parent or child. - */ -void anon_vma_moveto_tail(struct vm_area_struct *dst) -{ - struct anon_vma_chain *pavc; - struct anon_vma *root = NULL; - - list_for_each_entry_reverse(pavc, &dst->anon_vma_chain, same_vma) { - struct anon_vma *anon_vma = pavc->anon_vma; - VM_BUG_ON(pavc->vma != dst); - root = lock_anon_vma_root(root, anon_vma); - list_del(&pavc->same_anon_vma); - list_add_tail(&pavc->same_anon_vma, &anon_vma->head); - } - unlock_anon_vma_root(root); -} - -/* * Attach vma to its own anon_vma, as well as to the anon_vmas that * the corresponding VMA in the parent process is attached to. * Returns 0 on success, non-zero on failure. @@ -381,13 +331,13 @@ void unlink_anon_vmas(struct vm_area_struct *vma) struct anon_vma *anon_vma = avc->anon_vma; root = lock_anon_vma_root(root, anon_vma); - list_del(&avc->same_anon_vma); + anon_vma_interval_tree_remove(avc, &anon_vma->rb_root); /* * Leave empty anon_vmas on the list - we'll need * to free them outside the lock. */ - if (list_empty(&anon_vma->head)) + if (RB_EMPTY_ROOT(&anon_vma->rb_root)) continue; list_del(&avc->same_vma); @@ -416,7 +366,7 @@ static void anon_vma_ctor(void *data) mutex_init(&anon_vma->mutex); atomic_set(&anon_vma->refcount, 0); - INIT_LIST_HEAD(&anon_vma->head); + anon_vma->rb_root = RB_ROOT; } void __init anon_vma_init(void) @@ -560,22 +510,26 @@ void page_unlock_anon_vma(struct anon_vma *anon_vma) /* * At what user virtual address is page expected in @vma? - * Returns virtual address or -EFAULT if page's index/offset is not - * within the range mapped the @vma. */ -inline unsigned long -vma_address(struct page *page, struct vm_area_struct *vma) +static inline unsigned long +__vma_address(struct page *page, struct vm_area_struct *vma) { pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); - unsigned long address; if (unlikely(is_vm_hugetlb_page(vma))) pgoff = page->index << huge_page_order(page_hstate(page)); - address = vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); - if (unlikely(address < vma->vm_start || address >= vma->vm_end)) { - /* page should be within @vma mapping range */ - return -EFAULT; - } + + return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); +} + +inline unsigned long +vma_address(struct page *page, struct vm_area_struct *vma) +{ + unsigned long address = __vma_address(page, vma); + + /* page should be within @vma mapping range */ + VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end); + return address; } @@ -585,6 +539,7 @@ vma_address(struct page *page, struct vm_area_struct *vma) */ unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma) { + unsigned long address; if (PageAnon(page)) { struct anon_vma *page__anon_vma = page_anon_vma(page); /* @@ -600,7 +555,10 @@ unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma) return -EFAULT; } else return -EFAULT; - return vma_address(page, vma); + address = __vma_address(page, vma); + if (unlikely(address < vma->vm_start || address >= vma->vm_end)) + return -EFAULT; + return address; } /* @@ -674,8 +632,8 @@ int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma) pte_t *pte; spinlock_t *ptl; - address = vma_address(page, vma); - if (address == -EFAULT) /* out of vma range */ + address = __vma_address(page, vma); + if (unlikely(address < vma->vm_start || address >= vma->vm_end)) return 0; pte = page_check_address(page, vma->vm_mm, address, &ptl, 1); if (!pte) /* the page is not in this mm */ @@ -769,6 +727,7 @@ static int page_referenced_anon(struct page *page, { unsigned int mapcount; struct anon_vma *anon_vma; + pgoff_t pgoff; struct anon_vma_chain *avc; int referenced = 0; @@ -777,11 +736,10 @@ static int page_referenced_anon(struct page *page, return referenced; mapcount = page_mapcount(page); - list_for_each_entry(avc, &anon_vma->head, same_anon_vma) { + pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); + anon_vma_interval_tree_foreach(avc, &anon_vma->rb_root, pgoff, pgoff) { struct vm_area_struct *vma = avc->vma; unsigned long address = vma_address(page, vma); - if (address == -EFAULT) - continue; /* * If we are reclaiming on behalf of a cgroup, skip * counting on behalf of references from different @@ -820,7 +778,6 @@ static int page_referenced_file(struct page *page, struct address_space *mapping = page->mapping; pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); struct vm_area_struct *vma; - struct prio_tree_iter iter; int referenced = 0; /* @@ -846,10 +803,8 @@ static int page_referenced_file(struct page *page, */ mapcount = page_mapcount(page); - vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { unsigned long address = vma_address(page, vma); - if (address == -EFAULT) - continue; /* * If we are reclaiming on behalf of a cgroup, skip * counting on behalf of references from different @@ -929,7 +884,7 @@ static int page_mkclean_one(struct page *page, struct vm_area_struct *vma, pte_t entry; flush_cache_page(vma, address, pte_pfn(*pte)); - entry = ptep_clear_flush_notify(vma, address, pte); + entry = ptep_clear_flush(vma, address, pte); entry = pte_wrprotect(entry); entry = pte_mkclean(entry); set_pte_at(mm, address, pte, entry); @@ -937,6 +892,9 @@ static int page_mkclean_one(struct page *page, struct vm_area_struct *vma, } pte_unmap_unlock(pte, ptl); + + if (ret) + mmu_notifier_invalidate_page(mm, address); out: return ret; } @@ -945,17 +903,14 @@ static int page_mkclean_file(struct address_space *mapping, struct page *page) { pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); struct vm_area_struct *vma; - struct prio_tree_iter iter; int ret = 0; BUG_ON(PageAnon(page)); mutex_lock(&mapping->i_mmap_mutex); - vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { if (vma->vm_flags & VM_SHARED) { unsigned long address = vma_address(page, vma); - if (address == -EFAULT) - continue; ret += page_mkclean_one(page, vma, address); } } @@ -1128,7 +1083,7 @@ void page_add_new_anon_rmap(struct page *page, else __inc_zone_page_state(page, NR_ANON_TRANSPARENT_HUGEPAGES); __page_set_anon_rmap(page, vma, address, 1); - if (page_evictable(page, vma)) + if (!mlocked_vma_newpage(vma, page)) lru_cache_add_lru(page, LRU_ACTIVE_ANON); else add_page_to_unevictable_list(page); @@ -1203,7 +1158,10 @@ void page_remove_rmap(struct page *page) } else { __dec_zone_page_state(page, NR_FILE_MAPPED); mem_cgroup_dec_page_stat(page, MEMCG_NR_FILE_MAPPED); + mem_cgroup_end_update_page_stat(page, &locked, &flags); } + if (unlikely(PageMlocked(page))) + clear_page_mlock(page); /* * It would be tidy to reset the PageAnon mapping here, * but that might overwrite a racing page_add_anon_rmap @@ -1213,6 +1171,7 @@ void page_remove_rmap(struct page *page) * Leaving it set also helps swapoff to reinstate ptes * faster for those pages still in swapcache. */ + return; out: if (!anon) mem_cgroup_end_update_page_stat(page, &locked, &flags); @@ -1256,7 +1215,7 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, /* Nuke the page table entry. */ flush_cache_page(vma, address, page_to_pfn(page)); - pteval = ptep_clear_flush_notify(vma, address, pte); + pteval = ptep_clear_flush(vma, address, pte); /* Move the dirty bit to the physical page now the pte is gone. */ if (pte_dirty(pteval)) @@ -1318,6 +1277,8 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, out_unmap: pte_unmap_unlock(pte, ptl); + if (ret != SWAP_FAIL) + mmu_notifier_invalidate_page(mm, address); out: return ret; @@ -1382,6 +1343,8 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount, spinlock_t *ptl; struct page *page; unsigned long address; + unsigned long mmun_start; /* For mmu_notifiers */ + unsigned long mmun_end; /* For mmu_notifiers */ unsigned long end; int ret = SWAP_AGAIN; int locked_vma = 0; @@ -1405,6 +1368,10 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount, if (!pmd_present(*pmd)) return ret; + mmun_start = address; + mmun_end = end; + mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); + /* * If we can acquire the mmap_sem for read, and vma is VM_LOCKED, * keep the sem while scanning the cluster for mlocking pages. @@ -1438,7 +1405,7 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount, /* Nuke the page table entry. */ flush_cache_page(vma, address, pte_pfn(*pte)); - pteval = ptep_clear_flush_notify(vma, address, pte); + pteval = ptep_clear_flush(vma, address, pte); /* If nonlinear, store the file page offset in the pte. */ if (page->index != linear_page_index(vma, address)) @@ -1454,6 +1421,7 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount, (*mapcount)--; } pte_unmap_unlock(pte - 1, ptl); + mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); if (locked_vma) up_read(&vma->vm_mm->mmap_sem); return ret; @@ -1492,6 +1460,7 @@ bool is_vma_temporary_stack(struct vm_area_struct *vma) static int try_to_unmap_anon(struct page *page, enum ttu_flags flags) { struct anon_vma *anon_vma; + pgoff_t pgoff; struct anon_vma_chain *avc; int ret = SWAP_AGAIN; @@ -1499,7 +1468,8 @@ static int try_to_unmap_anon(struct page *page, enum ttu_flags flags) if (!anon_vma) return ret; - list_for_each_entry(avc, &anon_vma->head, same_anon_vma) { + pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); + anon_vma_interval_tree_foreach(avc, &anon_vma->rb_root, pgoff, pgoff) { struct vm_area_struct *vma = avc->vma; unsigned long address; @@ -1516,8 +1486,6 @@ static int try_to_unmap_anon(struct page *page, enum ttu_flags flags) continue; address = vma_address(page, vma); - if (address == -EFAULT) - continue; ret = try_to_unmap_one(page, vma, address, flags); if (ret != SWAP_AGAIN || !page_mapped(page)) break; @@ -1547,7 +1515,6 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags) struct address_space *mapping = page->mapping; pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); struct vm_area_struct *vma; - struct prio_tree_iter iter; int ret = SWAP_AGAIN; unsigned long cursor; unsigned long max_nl_cursor = 0; @@ -1555,10 +1522,8 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags) unsigned int mapcount; mutex_lock(&mapping->i_mmap_mutex); - vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { unsigned long address = vma_address(page, vma); - if (address == -EFAULT) - continue; ret = try_to_unmap_one(page, vma, address, flags); if (ret != SWAP_AGAIN || !page_mapped(page)) goto out; @@ -1576,7 +1541,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags) goto out; list_for_each_entry(vma, &mapping->i_mmap_nonlinear, - shared.vm_set.list) { + shared.nonlinear) { cursor = (unsigned long) vma->vm_private_data; if (cursor > max_nl_cursor) max_nl_cursor = cursor; @@ -1608,7 +1573,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags) do { list_for_each_entry(vma, &mapping->i_mmap_nonlinear, - shared.vm_set.list) { + shared.nonlinear) { cursor = (unsigned long) vma->vm_private_data; while ( cursor < max_nl_cursor && cursor < vma->vm_end - vma->vm_start) { @@ -1631,7 +1596,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags) * in locked vmas). Reset cursor on all unreserved nonlinear * vmas, now forgetting on which ones it had fallen behind. */ - list_for_each_entry(vma, &mapping->i_mmap_nonlinear, shared.vm_set.list) + list_for_each_entry(vma, &mapping->i_mmap_nonlinear, shared.nonlinear) vma->vm_private_data = NULL; out: mutex_unlock(&mapping->i_mmap_mutex); @@ -1716,6 +1681,7 @@ static int rmap_walk_anon(struct page *page, int (*rmap_one)(struct page *, struct vm_area_struct *, unsigned long, void *), void *arg) { struct anon_vma *anon_vma; + pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); struct anon_vma_chain *avc; int ret = SWAP_AGAIN; @@ -1729,11 +1695,9 @@ static int rmap_walk_anon(struct page *page, int (*rmap_one)(struct page *, if (!anon_vma) return ret; anon_vma_lock(anon_vma); - list_for_each_entry(avc, &anon_vma->head, same_anon_vma) { + anon_vma_interval_tree_foreach(avc, &anon_vma->rb_root, pgoff, pgoff) { struct vm_area_struct *vma = avc->vma; unsigned long address = vma_address(page, vma); - if (address == -EFAULT) - continue; ret = rmap_one(page, vma, address, arg); if (ret != SWAP_AGAIN) break; @@ -1748,16 +1712,13 @@ static int rmap_walk_file(struct page *page, int (*rmap_one)(struct page *, struct address_space *mapping = page->mapping; pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT); struct vm_area_struct *vma; - struct prio_tree_iter iter; int ret = SWAP_AGAIN; if (!mapping) return ret; mutex_lock(&mapping->i_mmap_mutex); - vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) { + vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { unsigned long address = vma_address(page, vma); - if (address == -EFAULT) - continue; ret = rmap_one(page, vma, address, arg); if (ret != SWAP_AGAIN) break; diff --git a/mm/shmem.c b/mm/shmem.c index d3752110c8c7..cc12072f8787 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1339,7 +1339,6 @@ static int shmem_mmap(struct file *file, struct vm_area_struct *vma) { file_accessed(file); vma->vm_ops = &shmem_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } @@ -2643,6 +2642,7 @@ static const struct vm_operations_struct shmem_vm_ops = { .set_policy = shmem_set_policy, .get_policy = shmem_get_policy, #endif + .remap_pages = generic_file_remap_pages, }; static struct dentry *shmem_mount(struct file_system_type *fs_type, @@ -2836,7 +2836,6 @@ int shmem_zero_setup(struct vm_area_struct *vma) fput(vma->vm_file); vma->vm_file = file; vma->vm_ops = &shmem_vm_ops; - vma->vm_flags |= VM_CAN_NONLINEAR; return 0; } diff --git a/mm/swap.c b/mm/swap.c index 77825883298f..6310dc2008ff 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -446,13 +446,22 @@ void mark_page_accessed(struct page *page) } EXPORT_SYMBOL(mark_page_accessed); +/* + * Order of operations is important: flush the pagevec when it's already + * full, not when adding the last page, to make sure that last page is + * not added to the LRU directly when passed to this function. Because + * mark_page_accessed() (called after this when writing) only activates + * pages that are on the LRU, linear writes in subpage chunks would see + * every PAGEVEC_SIZE page activated, which is unexpected. + */ void __lru_cache_add(struct page *page, enum lru_list lru) { struct pagevec *pvec = &get_cpu_var(lru_add_pvecs)[lru]; page_cache_get(page); - if (!pagevec_add(pvec, page)) + if (!pagevec_space(pvec)) __pagevec_lru_add(pvec, lru); + pagevec_add(pvec, page); put_cpu_var(lru_add_pvecs); } EXPORT_SYMBOL(__lru_cache_add); @@ -742,7 +751,7 @@ void lru_add_page_tail(struct page *page, struct page *page_tail, SetPageLRU(page_tail); - if (page_evictable(page_tail, NULL)) { + if (page_evictable(page_tail)) { if (PageActive(page)) { SetPageActive(page_tail); active = 1; diff --git a/mm/truncate.c b/mm/truncate.c index 75801acdaac7..d51ce92d6e83 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -107,7 +107,6 @@ truncate_complete_page(struct address_space *mapping, struct page *page) cancel_dirty_page(page, PAGE_CACHE_SIZE); - clear_page_mlock(page); ClearPageMappedToDisk(page); delete_from_page_cache(page); return 0; @@ -132,7 +131,6 @@ invalidate_complete_page(struct address_space *mapping, struct page *page) if (page_has_private(page) && !try_to_release_page(page, 0)) return 0; - clear_page_mlock(page); ret = remove_mapping(mapping, page); return ret; @@ -398,7 +396,6 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page) if (PageDirty(page)) goto failed; - clear_page_mlock(page); BUG_ON(page_has_private(page)); __delete_from_page_cache(page); spin_unlock_irq(&mapping->tree_lock); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 2bb90b1d241c..78e08300db21 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2163,8 +2163,7 @@ int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, usize -= PAGE_SIZE; } while (usize > 0); - /* Prevent "things" like memory migration? VM_flags need a cleanup... */ - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; return 0; } @@ -2572,7 +2571,7 @@ static int s_show(struct seq_file *m, void *p) { struct vm_struct *v = p; - seq_printf(m, "0x%p-0x%p %7ld", + seq_printf(m, "0x%pK-0x%pK %7ld", v->addr, v->addr + v->size, v->size); if (v->caller) diff --git a/mm/vmscan.c b/mm/vmscan.c index 99b434b674c0..2624edcfb420 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -553,7 +553,7 @@ void putback_lru_page(struct page *page) redo: ClearPageUnevictable(page); - if (page_evictable(page, NULL)) { + if (page_evictable(page)) { /* * For evictable pages, we can use the cache. * In event of a race, worst case is we end up with an @@ -587,7 +587,7 @@ redo: * page is on unevictable list, it never be freed. To avoid that, * check after we added it to the list, again. */ - if (lru == LRU_UNEVICTABLE && page_evictable(page, NULL)) { + if (lru == LRU_UNEVICTABLE && page_evictable(page)) { if (!isolate_lru_page(page)) { put_page(page); goto redo; @@ -674,8 +674,10 @@ static enum page_references page_check_references(struct page *page, static unsigned long shrink_page_list(struct list_head *page_list, struct zone *zone, struct scan_control *sc, + enum ttu_flags ttu_flags, unsigned long *ret_nr_dirty, - unsigned long *ret_nr_writeback) + unsigned long *ret_nr_writeback, + bool force_reclaim) { LIST_HEAD(ret_pages); LIST_HEAD(free_pages); @@ -689,10 +691,10 @@ static unsigned long shrink_page_list(struct list_head *page_list, mem_cgroup_uncharge_start(); while (!list_empty(page_list)) { - enum page_references references; struct address_space *mapping; struct page *page; int may_enter_fs; + enum page_references references = PAGEREF_RECLAIM_CLEAN; cond_resched(); @@ -707,7 +709,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, sc->nr_scanned++; - if (unlikely(!page_evictable(page, NULL))) + if (unlikely(!page_evictable(page))) goto cull_mlocked; if (!sc->may_unmap && page_mapped(page)) @@ -758,7 +760,9 @@ static unsigned long shrink_page_list(struct list_head *page_list, wait_on_page_writeback(page); } - references = page_check_references(page, sc); + if (!force_reclaim) + references = page_check_references(page, sc); + switch (references) { case PAGEREF_ACTIVATE: goto activate_locked; @@ -788,7 +792,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, * processes. Try to unmap it here. */ if (page_mapped(page) && mapping) { - switch (try_to_unmap(page, TTU_UNMAP)) { + switch (try_to_unmap(page, ttu_flags)) { case SWAP_FAIL: goto activate_locked; case SWAP_AGAIN: @@ -960,6 +964,33 @@ keep: return nr_reclaimed; } +unsigned long reclaim_clean_pages_from_list(struct zone *zone, + struct list_head *page_list) +{ + struct scan_control sc = { + .gfp_mask = GFP_KERNEL, + .priority = DEF_PRIORITY, + .may_unmap = 1, + }; + unsigned long ret, dummy1, dummy2; + struct page *page, *next; + LIST_HEAD(clean_pages); + + list_for_each_entry_safe(page, next, page_list, lru) { + if (page_is_file_cache(page) && !PageDirty(page)) { + ClearPageActive(page); + list_move(&page->lru, &clean_pages); + } + } + + ret = shrink_page_list(&clean_pages, zone, &sc, + TTU_UNMAP|TTU_IGNORE_ACCESS, + &dummy1, &dummy2, true); + list_splice(&clean_pages, page_list); + __mod_zone_page_state(zone, NR_ISOLATED_FILE, -ret); + return ret; +} + /* * Attempt to remove the specified page from its LRU. Only take this page * if it is of the appropriate PageActive status. Pages which are being @@ -978,8 +1009,8 @@ int __isolate_lru_page(struct page *page, isolate_mode_t mode) if (!PageLRU(page)) return ret; - /* Do not give back unevictable pages for compaction */ - if (PageUnevictable(page)) + /* Compaction should not handle unevictable pages but CMA can do so */ + if (PageUnevictable(page) && !(mode & ISOLATE_UNEVICTABLE)) return ret; ret = -EBUSY; @@ -1186,7 +1217,7 @@ putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list) VM_BUG_ON(PageLRU(page)); list_del(&page->lru); - if (unlikely(!page_evictable(page, NULL))) { + if (unlikely(!page_evictable(page))) { spin_unlock_irq(&zone->lru_lock); putback_lru_page(page); spin_lock_irq(&zone->lru_lock); @@ -1278,8 +1309,8 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec, if (nr_taken == 0) return 0; - nr_reclaimed = shrink_page_list(&page_list, zone, sc, - &nr_dirty, &nr_writeback); + nr_reclaimed = shrink_page_list(&page_list, zone, sc, TTU_UNMAP, + &nr_dirty, &nr_writeback, false); spin_lock_irq(&zone->lru_lock); @@ -1439,7 +1470,7 @@ static void shrink_active_list(unsigned long nr_to_scan, page = lru_to_page(&l_hold); list_del(&page->lru); - if (unlikely(!page_evictable(page, NULL))) { + if (unlikely(!page_evictable(page))) { putback_lru_page(page); continue; } @@ -1729,6 +1760,28 @@ static bool in_reclaim_compaction(struct scan_control *sc) return false; } +#ifdef CONFIG_COMPACTION +/* + * If compaction is deferred for sc->order then scale the number of pages + * reclaimed based on the number of consecutive allocation failures + */ +static unsigned long scale_for_compaction(unsigned long pages_for_compaction, + struct lruvec *lruvec, struct scan_control *sc) +{ + struct zone *zone = lruvec_zone(lruvec); + + if (zone->compact_order_failed <= sc->order) + pages_for_compaction <<= zone->compact_defer_shift; + return pages_for_compaction; +} +#else +static unsigned long scale_for_compaction(unsigned long pages_for_compaction, + struct lruvec *lruvec, struct scan_control *sc) +{ + return pages_for_compaction; +} +#endif + /* * Reclaim/compaction is used for high-order allocation requests. It reclaims * order-0 pages before compacting the zone. should_continue_reclaim() returns @@ -1776,6 +1829,9 @@ static inline bool should_continue_reclaim(struct lruvec *lruvec, * inactive lists are large enough, continue reclaiming */ pages_for_compaction = (2UL << sc->order); + + pages_for_compaction = scale_for_compaction(pages_for_compaction, + lruvec, sc); inactive_lru_pages = get_lru_size(lruvec, LRU_INACTIVE_FILE); if (nr_swap_pages > 0) inactive_lru_pages += get_lru_size(lruvec, LRU_INACTIVE_ANON); @@ -2839,6 +2895,14 @@ static void kswapd_try_to_sleep(pg_data_t *pgdat, int order, int classzone_idx) */ set_pgdat_percpu_threshold(pgdat, calculate_normal_threshold); + /* + * Compaction records what page blocks it recently failed to + * isolate pages from and skips them in the future scanning. + * When kswapd is going to sleep, it is reasonable to assume + * that pages and compaction may succeed so reset the cache. + */ + reset_isolation_suitable(pgdat); + if (!kthread_should_stop()) schedule(); @@ -3101,9 +3165,9 @@ int kswapd_run(int nid) if (IS_ERR(pgdat->kswapd)) { /* failure at boot is fatal */ BUG_ON(system_state == SYSTEM_BOOTING); - printk("Failed to start kswapd on node %d\n",nid); pgdat->kswapd = NULL; - ret = -1; + pr_err("Failed to start kswapd on node %d\n", nid); + ret = PTR_ERR(pgdat->kswapd); } return ret; } @@ -3350,27 +3414,18 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order) /* * page_evictable - test whether a page is evictable * @page: the page to test - * @vma: the VMA in which the page is or will be mapped, may be NULL * * Test whether page is evictable--i.e., should be placed on active/inactive - * lists vs unevictable list. The vma argument is !NULL when called from the - * fault path to determine how to instantate a new page. + * lists vs unevictable list. * * Reasons page might not be evictable: * (1) page's mapping marked unevictable * (2) page is part of an mlocked VMA * */ -int page_evictable(struct page *page, struct vm_area_struct *vma) +int page_evictable(struct page *page) { - - if (mapping_unevictable(page_mapping(page))) - return 0; - - if (PageMlocked(page) || (vma && mlocked_vma_newpage(vma, page))) - return 0; - - return 1; + return !mapping_unevictable(page_mapping(page)) && !PageMlocked(page); } #ifdef CONFIG_SHMEM @@ -3408,7 +3463,7 @@ void check_move_unevictable_pages(struct page **pages, int nr_pages) if (!PageLRU(page) || !PageUnevictable(page)) continue; - if (page_evictable(page, NULL)) { + if (page_evictable(page)) { enum lru_list lru = page_lru_base_type(page); VM_BUG_ON(PageActive(page)); diff --git a/mm/vmstat.c b/mm/vmstat.c index b3e3b9d525d0..c7370579111b 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -495,6 +495,18 @@ void refresh_cpu_vm_stats(int cpu) atomic_long_add(global_diff[i], &vm_stat[i]); } +void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset) +{ + int i; + + for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) + if (pset->vm_stat_diff[i]) { + int v = pset->vm_stat_diff[i]; + pset->vm_stat_diff[i] = 0; + atomic_long_add(v, &zone->vm_stat[i]); + atomic_long_add(v, &vm_stat[i]); + } +} #endif #ifdef CONFIG_NUMA @@ -722,6 +734,7 @@ const char * const vmstat_text[] = { "numa_other", #endif "nr_anon_transparent_hugepages", + "nr_free_cma", "nr_dirty_threshold", "nr_dirty_background_threshold", @@ -781,7 +794,6 @@ const char * const vmstat_text[] = { "unevictable_pgs_munlocked", "unevictable_pgs_cleared", "unevictable_pgs_stranded", - "unevictable_pgs_mlockfreed", #ifdef CONFIG_TRANSPARENT_HUGEPAGE "thp_fault_alloc", diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index ccbdfbba9e53..c1d756cc7448 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -221,7 +221,6 @@ struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, kref_init(&req->r_kref); init_completion(&req->r_completion); init_completion(&req->r_safe_completion); - rb_init_node(&req->r_node); INIT_LIST_HEAD(&req->r_unsafe_item); INIT_LIST_HEAD(&req->r_linger_item); INIT_LIST_HEAD(&req->r_linger_osd); diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index 55af8c5b57e6..3a6e8731646c 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -485,7 +485,7 @@ static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) return -EACCES; } - vma->vm_flags |= VM_RESERVED; + vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = &sel_mmap_policy_ops; return 0; diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c index 867558c98334..2952ba576fb9 100644 --- a/security/tomoyo/util.c +++ b/security/tomoyo/util.c @@ -949,18 +949,13 @@ bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename, const char *tomoyo_get_exe(void) { struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; const char *cp = NULL; if (!mm) return NULL; down_read(&mm->mmap_sem); - for (vma = mm->mmap; vma; vma = vma->vm_next) { - if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) { - cp = tomoyo_realpath_from_path(&vma->vm_file->f_path); - break; - } - } + if (mm->exe_file) + cp = tomoyo_realpath_from_path(&mm->exe_file->f_path); up_read(&mm->mmap_sem); return cp; } diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 20554eff5a21..5e12e5bacbba 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -3039,7 +3039,7 @@ static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file return -EINVAL; area->vm_ops = &snd_pcm_vm_ops_status; area->vm_private_data = substream; - area->vm_flags |= VM_RESERVED; + area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; return 0; } @@ -3076,7 +3076,7 @@ static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file return -EINVAL; area->vm_ops = &snd_pcm_vm_ops_control; area->vm_private_data = substream; - area->vm_flags |= VM_RESERVED; + area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; return 0; } #else /* ! coherent mmap */ @@ -3170,7 +3170,7 @@ static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *area) { - area->vm_flags |= VM_RESERVED; + area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; #ifdef ARCH_HAS_DMA_MMAP_COHERENT if (!substream->ops->page && substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c index c4fd3b1d9592..d0323a693ba2 100644 --- a/sound/usb/usx2y/us122l.c +++ b/sound/usb/usx2y/us122l.c @@ -262,7 +262,7 @@ static int usb_stream_hwdep_mmap(struct snd_hwdep *hw, } area->vm_ops = &usb_stream_hwdep_vm_ops; - area->vm_flags |= VM_RESERVED; + area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; area->vm_private_data = us122l; atomic_inc(&us122l->mmap_count); out: diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c index 04aafb43a13c..0b34dbc8f302 100644 --- a/sound/usb/usx2y/usX2Yhwdep.c +++ b/sound/usb/usx2y/usX2Yhwdep.c @@ -82,7 +82,7 @@ static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct v us428->us428ctls_sharedmem->CtlSnapShotLast = -2; } area->vm_ops = &us428ctls_vm_ops; - area->vm_flags |= VM_RESERVED | VM_DONTEXPAND; + area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; area->vm_private_data = hw->private_data; return 0; } diff --git a/sound/usb/usx2y/usx2yhwdeppcm.c b/sound/usb/usx2y/usx2yhwdeppcm.c index 8e40b6e67e9e..cc56007791e0 100644 --- a/sound/usb/usx2y/usx2yhwdeppcm.c +++ b/sound/usb/usx2y/usx2yhwdeppcm.c @@ -723,7 +723,7 @@ static int snd_usX2Y_hwdep_pcm_mmap(struct snd_hwdep * hw, struct file *filp, st return -ENODEV; } area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops; - area->vm_flags |= VM_RESERVED | VM_DONTEXPAND; + area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; area->vm_private_data = hw->private_data; return 0; } diff --git a/tools/perf/util/include/linux/rbtree.h b/tools/perf/util/include/linux/rbtree.h index 2a030c5af3aa..9bcdc844b330 100644 --- a/tools/perf/util/include/linux/rbtree.h +++ b/tools/perf/util/include/linux/rbtree.h @@ -1,2 +1,3 @@ #include <stdbool.h> +#include <stdbool.h> #include "../../../../include/linux/rbtree.h" |