summaryrefslogtreecommitdiffstats
path: root/fs
Commit message (Collapse)AuthorAgeFilesLines
* Merge branch 'for-linus' of ↵Linus Torvalds2014-04-0716-279/+407
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "The biggest chunk is a series of patches from Ilya that add support for new Ceph osd and crush map features, including some new tunables, primary affinity, and the new encoding that is needed for erasure coding support. This brings things into parity with the server side and the looming firefly release. There is also support for allocation hints in RBD that help limit fragmentation on the server side. There is also a series of patches from Zheng fixing NFS reexport, directory fragmentation support, flock vs fnctl behavior, and some issues with clustered MDS. Finally, there are some miscellaneous fixes from Yunchuan Wen for fscache, Fabian Frederick for ACLs, and from me for fsync(dirfd) behavior" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (79 commits) ceph: skip invalid dentry during dcache readdir libceph: dump pool {read,write}_tier to debugfs libceph: output primary affinity values on osdmap updates ceph: flush cap release queue when trimming session caps ceph: don't grabs open file reference for aborted request ceph: drop extra open file reference in ceph_atomic_open() ceph: preallocate buffer for readdir reply libceph: enable PRIMARY_AFFINITY feature bit libceph: redo ceph_calc_pg_primary() in terms of ceph_calc_pg_acting() libceph: add support for osd primary affinity libceph: add support for primary_temp mappings libceph: return primary from ceph_calc_pg_acting() libceph: switch ceph_calc_pg_acting() to new helpers libceph: introduce apply_temps() helper libceph: introduce pg_to_raw_osds() and raw_to_up_osds() helpers libceph: ceph_can_shift_osds(pool) and pool type defines libceph: ceph_osd_{exists,is_up,is_down}(osd) definitions libceph: enable OSDMAP_ENC feature bit libceph: primary_affinity decode bits libceph: primary_affinity infrastructure ...
| * ceph: skip invalid dentry during dcache readdirYan, Zheng2014-04-061-5/+8
| | | | | | | | | | | | | | | | skip dentries that were added before MDS issued FILE_SHARED to client. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: flush cap release queue when trimming session capsYan, Zheng2014-04-041-0/+3
| | | | | | | | Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: don't grabs open file reference for aborted requestYan, Zheng2014-04-041-1/+1
| | | | | | | | Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: drop extra open file reference in ceph_atomic_open()Yan, Zheng2014-04-041-1/+2
| | | | | | | | | | | | | | | | ceph_atomic_open() calls ceph_open() after receiving the MDS reply. ceph_open() grabs an extra open file reference. (The open request already holds an open file reference) Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: preallocate buffer for readdir replyYan, Zheng2014-04-043-21/+59
| | | | | | | | | | | | | | Preallocate buffer for readdir reply. Limit number of entries in readdir reply according to the buffer size. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: don't include ceph.{file,dir}.layout vxattr in listxattr()Yan, Zheng2014-04-041-2/+2
| | | | | | | | | | | | This avoids 'cp -a' modifying layout of new files/directories. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: check buffer size in ceph_vxattrcb_layout()Yan, Zheng2014-04-041-9/+25
| | | | | | | | | | | | | | If buffer size is zero, return the size of layout vxattr. If buffer size is not zero, check if it is large enough for layout vxattr. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: fix null pointer dereference in discard_cap_releases()Yan, Zheng2014-04-041-9/+12
| | | | | | | | | | | | | | | | send_mds_reconnect() may call discard_cap_releases() after all release messages have been dropped by cleanup_cap_releases() Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: Remove get/set acl on symlinksFabian Frederick2014-04-041-2/+0
| | | | | | | | | | | | | | Remove unsupported symlink operations. Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
| * ceph: set mds_wanted when MDS reply changes a cap to auth capYan, Zheng2014-04-041-1/+3
| | | | | | | | | | | | | | | | | | When adjusting caps client wants, MDS does not record caps that are not allowed. For non-auth MDS, it does not record WR caps. So when a MDS reply changes a non-auth cap to auth cap, client needs to set cap's mds_wanted according to the reply. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: use fl->fl_file as owner identifier of flock and posix lockYan, Zheng2014-04-043-20/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | flock and posix lock should use fl->fl_file instead of process ID as owner identifier. (posix lock uses fl->fl_owner. fl->fl_owner is usually equal to fl->fl_file, but it also can be a customized value). The process ID of who holds the lock is just for F_GETLK fcntl(2). The fix is rename the 'pid' fields of struct ceph_mds_request_args and struct ceph_filelock to 'owner', rename 'pid_namespace' fields to 'pid'. Assign fl->fl_file to the 'owner' field of lock messages. We also set the most significant bit of the 'owner' field. MDS can use that bit to distinguish between old and new clients. The MDS counterpart of this patch modifies the flock code to not take the 'pid_namespace' into consideration when checking conflict locks. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: forbid mandatory file lockYan, Zheng2014-04-041-0/+12
| | | | | | | | Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: use fl->fl_type to decide flock operationYan, Zheng2014-04-041-12/+9
| | | | | | | | | | | | | | | | VFS does not directly pass flock's operation code to filesystem's flock callback. It translates the operation code to the form how posix lock's parameters are presented. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: update i_max_size even if inode version does not changeYan, Zheng2014-04-041-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | handle following sequence of events: - client releases a inode with i_max_size > 0. The release message is queued. (is not sent to the auth MDS) - a 'lookup' request reply from non-auth MDS returns the same inode. - client opens the inode in write mode. The version of inode trace in 'open' request reply is equal to the cached inode's version. - client requests new max size. The MDS ignores the request because it does not affect client's write range Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: make sure write caps are registered with auth MDSYan, Zheng2014-04-041-1/+4
| | | | | | | | | | | | | | Only auth MDS can issue write caps to clients, so don't consider write caps registered with non-auth MDS as valid. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: print inode number for LOOKUPINO requestYan, Zheng2014-04-031-0/+2
| | | | | | | | | | Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: add get_name() NFS export callbackYan, Zheng2014-04-033-1/+91
| | | | | | | | | | | | | | | | Use the newly introduced LOOKUPNAME MDS request to connect child inode to its parent directory. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: fix ceph_fh_to_parent()Yan, Zheng2014-04-031-33/+9
| | | | | | | | | | | | | | | | | | ceph_fh_to_parent() returns dentry that corresponds to the 'ino' field of struct ceph_nfs_confh. This is wrong, it should return dentry that corresponds to the 'parent_ino' field. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: add get_parent() NFS export callbackYan, Zheng2014-04-031-0/+60
| | | | | | | | | | | | | | The callback uses LOOKUPPARENT MDS request to find parent. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: simplify ceph_fh_to_dentry()Yan, Zheng2014-04-031-135/+32
| | | | | | | | | | | | | | | | MDS handles LOOKUPHASH and LOOKUPINO MDS requests in the same way. So __cfh_to_dentry() is redundant. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * ceph: fscache: Wait for completion of object initializationYunchuan Wen2014-04-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The object store limit needs to be updated after writing, and this can be done provided the corresponding object has already been initialized. Current object initialization is done asynchrously, which introduce a race if a file is opened, then immediately followed by a writing, the initialization may have not completed, the code will reach the ASSERT in fscache_submit_exclusive_op() to cause kernel bug. Tested-by: Milosz Tanski <milosz@adfin.com> Signed-off-by: Yunchuan Wen <yunchuanwen@ubuntukylin.com> Signed-off-by: Min Chen <minchen@ubuntukylin.com> Signed-off-by: Li Wang <liwang@ubuntukylin.com>
| * ceph: fscache: Update object store limit after file writingYunchuan Wen2014-04-031-0/+3
| | | | | | | | | | | | | | | | | | Synchronize object->store_limit[_l] with new inode->i_size after file writing. Tested-by: Milosz Tanski <milosz@adfin.com> Signed-off-by: Yunchuan Wen <yunchuanwen@ubuntukylin.com> Signed-off-by: Min Chen <minchen@ubuntukylin.com> Signed-off-by: Li Wang <liwang@ubuntukylin.com>
| * ceph: fscache: add an interface to synchronize object store limitYunchuan Wen2014-04-031-0/+10
| | | | | | | | | | | | | | | | | | | | Add an interface to explicitly synchronize object->store_limit[_l] with inode->i_size Tested-by: Milosz Tanski <milosz@adfin.com> Signed-off-by: Yunchuan Wen <yunchuanwen@ubuntukylin.com> Signed-off-by: Min Chen <minchen@ubuntukylin.com> Signed-off-by: Li Wang <liwang@ubuntukylin.com>
| * ceph: do not set r_old_dentry_dir on link()Sage Weil2014-04-031-2/+1
| | | | | | | | | | | | | | | | | | | | | | This is racy--we do not know whather d_parent has changed out from underneath us because i_mutex is not held on the source inode's directory. Also, taking this reference is useless. Reported-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: do not assume r_old_dentry[_dir] always set togetherSage Weil2014-04-032-4/+6
| | | | | | | | | | | | | | | | | | Do not assume that r_old_dentry implies that r_old_dentry_dir is also true. Separate out the ref cleanup and make the debugs dump behave when it is NULL. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: do not chain inode updates to parent fsyncSage Weil2014-04-034-17/+5
| | | | | | | | | | | | | | | | | | The fsync(dirfd) only covers namespace operations, not inode updates. We do not need to cover setattr variants or O_TRUNC. Reported-by: Al Viro <viro@xeniv.linux.org.uk> Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: avoid useless ceph_get_dentry_parent_inode() in ceph_rename()Sage Weil2014-04-031-1/+2
| | | | | | | | | | | | | | | | This is just old_dir; no reason to abuse the dcache pointers. Reported-by: Al Viro <viro.zeniv.linux.org.uk> Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: let MDS adjust readdir 'frag'Yan, Zheng2014-04-031-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | If readdir 'frag' is adjusted, readdir 'offset' should be reset. Otherwise some dentries may be lost when readdir and fragmenting directory happen at the some. Another way to fix this issue is let MDS adjust readdir 'frag'. The code that handles MDS reply reset the readdir 'offset' if the readdir reply is different than the requested one. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
| * ceph: fix reset_readdir()Yan, Zheng2014-04-031-3/+6
| | | | | | | | | | | | | | | | When changing readdir postion, fi->next_offset should be set to 0 if the new postion is not in the first dirfrag. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Alex Elder <elder@linaro.org>
| * ceph: fix ceph_dir_llseek()Yan, Zheng2014-04-032-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | Comparing offset with inode->i_sb->s_maxbytes doesn't make sense for directory. For a fragmented directory, offset (frag_t, off) can be larger than inode->i_sb->s_maxbytes. At the very beginning of ceph_dir_llseek(), local variable old_offset is initialized to parameter offset. This doesn't make sense neither. Old_offset should be ceph_make_fpos(fi->frag, fi->next_offset). Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Alex Elder <elder@linaro.org>
* | Merge tag 'for-f2fs-3.15' of ↵Linus Torvalds2014-04-0718-506/+902
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "This patch-set includes the following major enhancement patches. - introduce large directory support - introduce f2fs_issue_flush to merge redundant flush commands - merge write IOs as much as possible aligned to the segment - add sysfs entries to tune the f2fs configuration - use radix_tree for the free_nid_list to reduce in-memory operations - remove costly bit operations in f2fs_find_entry - enhance the readahead flow for CP/NAT/SIT/SSA blocks The other bug fixes are as follows: - recover xattr node blocks correctly after sudden-power-cut - fix to calculate the maximum number of node ids - enhance to handle many error cases And, there are a bunch of cleanups" * tag 'for-f2fs-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (62 commits) f2fs: fix wrong statistics of inline data f2fs: check the acl's validity before setting f2fs: introduce f2fs_issue_flush to avoid redundant flush issue f2fs: fix to cover io->bio with io_rwsem f2fs: fix error path when fail to read inline data f2fs: use list_for_each_entry{_safe} for simplyfying code f2fs: avoid free slab cache under spinlock f2fs: avoid unneeded lookup when xattr name length is too long f2fs: avoid unnecessary bio submit when wait page writeback f2fs: return -EIO when node id is not matched f2fs: avoid RECLAIM_FS-ON-W warning f2fs: skip unnecessary node writes during fsync f2fs: introduce fi->i_sem to protect fi's info f2fs: change reclaim rate in percentage f2fs: add missing documentation for dir_level f2fs: remove unnecessary threshold f2fs: throttle the memory footprint with a sysfs entry f2fs: avoid to drop nat entries due to the negative nr_shrink f2fs: call f2fs_wait_on_page_writeback instead of native function f2fs: introduce nr_pages_to_write for segment alignment ...
| * | f2fs: fix wrong statistics of inline dataChao Yu2014-04-071-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we remove a file that has inline data after mount, our statistics turns to inaccurate. cat /sys/kernel/debug/f2fs/status - Inline_data Inode: 4294967295 Let's add stat_inc_inline_inode() to stat inline info of the file when lookup. Change log from v1: o stat in f2fs_lookup() instead of in do_read_inode() for excluding wrong stat. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: check the acl's validity before settingZhangZhen2014-04-071-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | Before setting the acl, call posix_acl_valid() to check if it is valid or not. Signed-off-by: zhangzhen <zhenzhang.zhang@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: introduce f2fs_issue_flush to avoid redundant flush issueJaegeuk Kim2014-04-074-1/+113
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some storage devices show relatively high latencies to complete cache_flush commands, even though their normal IO speed is prettry much high. In such the case, it needs to merge cache_flush commands as much as possible to avoid issuing them redundantly. So, this patch introduces a mount option, "-o flush_merge", to mitigate such the overhead. If this option is enabled by user, F2FS merges the cache_flush commands and then issues just one cache_flush on behalf of them. Once the single command is finished, F2FS sends a completion signal to all the pending threads. Note that, this option can be used under a workload consisting of very intensive concurrent fsync calls, while the storage handles cache_flush commands slowly. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: fix to cover io->bio with io_rwsemJaegeuk Kim2014-04-021-3/+2
| | | | | | | | | | | | | | | | | | | | | In the f2fs_wait_on_page_writeback, io->bio should be covered by io_rwsem. Otherwise, the bio pointer can become a dangling pointer due to data races. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: fix error path when fail to read inline dataChao Yu2014-04-022-5/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | We should unlock page in ->readpage() path and also should unlock & release page in error path of ->write_begin() to avoid deadlock or memory leak. So let's add release code to fix the problem when we fail to read inline data. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: use list_for_each_entry{_safe} for simplyfying codeChao Yu2014-04-024-41/+24
| | | | | | | | | | | | | | | | | | | | | | | | This patch use list_for_each_entry{_safe} instead of list_for_each{_safe} for simplfying code. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: avoid free slab cache under spinlockChao Yu2014-04-022-11/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move kmem_cache_free out of spinlock protection region for better performance. Change log from v1: o remove spinlock protection for kmem_cache_free in destroy_node_manager suggested by Jaegeuk Kim. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: avoid unneeded lookup when xattr name length is too longChao Yu2014-04-011-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | In f2fs_setxattr we have limit this attribute name length, so we should also check it in f2fs_getxattr to avoid useless lookup caused by invalid name length. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: avoid unnecessary bio submit when wait page writebackChao Yu2014-04-014-8/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduce is_merged_page() to check whether current page is merged in f2fs bio cache. When page is not in cache, we can avoid submitting bio cache, resulting in having more chance to merge pages. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: return -EIO when node id is not matchedJaegeuk Kim2014-04-011-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | During the cleaing of node segments, F2FS can get errored node blocks due to data race between node page lock and its valid bitmap operations. In that case, it needs to return an error to skip such the obsolete block copy. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: avoid RECLAIM_FS-ON-W warningJaegeuk Kim2014-03-202-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch should resolve the following possible bug. RECLAIM_FS-ON-W at: mark_held_locks+0xb9/0x140 lockdep_trace_alloc+0x85/0xf0 __kmalloc+0x53/0x1d0 read_all_xattrs+0x3d1/0x3f0 [f2fs] f2fs_getxattr+0x4f/0x100 [f2fs] f2fs_get_acl+0x4c/0x290 [f2fs] get_acl+0x4f/0x80 posix_acl_create+0x72/0x180 f2fs_init_acl+0x29/0xcc [f2fs] __f2fs_add_link+0x259/0x710 [f2fs] f2fs_create+0xad/0x1c0 [f2fs] vfs_create+0xed/0x150 do_last+0xd36/0xed0 path_openat+0xc5/0x680 do_filp_open+0x43/0xa0 do_sys_open+0x13c/0x230 SyS_creat+0x1e/0x20 system_call_fastpath+0x16/0x1b Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: skip unnecessary node writes during fsyncJaegeuk Kim2014-03-204-9/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If multiple redundant fsync calls are triggered, we don't need to write its node pages with fsync mark continuously. So, this patch adds FI_NEED_FSYNC to track whether the latest node block is written with the fsync mark or not. If the mark was set, a new fsync doesn't need to write a node block. Otherwise, we should do a new node block with the mark for roll-forward recovery. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: introduce fi->i_sem to protect fi's infoJaegeuk Kim2014-03-206-4/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces fi->i_sem to protect fi's info that includes xattr_ver, pino, i_nlink. This enables to remove i_mutex during f2fs_sync_file, resulting in performance improvement when a number of fsync calls are triggered from many concurrent threads. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: change reclaim rate in percentageJaegeuk Kim2014-03-202-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | It is more reasonable to determine the reclaiming rate of prefree segments according to the volume size, which is set to 5% by default. For example, if the volume is 128GB, the prefree segments are reclaimed when the number reaches to 6.4GB. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: remove unnecessary thresholdJaegeuk Kim2014-03-203-11/+5
| | | | | | | | | | | | | | | | | | | | | The NM_WOUT_THRESHOLD is now obsolete since f2fs starts to control on a basis of the memory footprint. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: throttle the memory footprint with a sysfs entryJaegeuk Kim2014-03-204-6/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces ram_thresh, a sysfs entry, which controls the memory footprint used by the free nid list and the nat cache. Previously, the free nid list was controlled by MAX_FREE_NIDS, while the nat cache was managed by NM_WOUT_THRESHOLD. However, this approach cannot be applied dynamically according to the system. So, this patch adds ram_thresh that users can specify the threshold, which is in order of 1 / 1024. For example, if the total ram size is 4GB and the value is set to 10 by default, f2fs tries to control the number of free nids and nat caches not to consume over 10 * (4GB / 1024) = 10MB. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: avoid to drop nat entries due to the negative nr_shrinkJaegeuk Kim2014-03-201-1/+1
| | | | | | | | | | | | | | | | | | | | | The try_to_free_nats should not receive the negative nr_shrink. Otherwise, it can drop all the nat entries by the while loop. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| * | f2fs: call f2fs_wait_on_page_writeback instead of native functionJaegeuk Kim2014-03-205-19/+16
| | | | | | | | | | | | | | | | | | | | | | | | If a page is on writeback, f2fs can face with deadlock due to under writepages. This is caused by merging IOs inside f2fs, so if it comes to detect, let's throw merged IOs, which is implemented by f2fs_wait_on_page_writeback. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-27 13:42:50 +0000