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* treewide: Add SPDX license identifier for missed filesThomas Gleixner2019-05-211-0/+1
| | | | | | | | | | | | | | | | | Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mm: convert totalram_pages and totalhigh_pages variables to atomicArun KS2018-12-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | totalram_pages and totalhigh_pages are made static inline function. Main motivation was that managed_page_count_lock handling was complicating things. It was discussed in length here, https://lore.kernel.org/patchwork/patch/995739/#1181785 So it seemes better to remove the lock and convert variables to atomic, with preventing poteintial store-to-read tearing as a bonus. [akpm@linux-foundation.org: coding style fixes] Link: http://lkml.kernel.org/r/1542090790-21750-4-git-send-email-arunks@codeaurora.org Signed-off-by: Arun KS <arunks@codeaurora.org> Suggested-by: Michal Hocko <mhocko@suse.com> Suggested-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: access zone->node via zone_to_nid() and zone_set_nid()Pavel Tatashin2018-08-221-7/+2
| | | | | | | | | | | | | | | | | | | | | zone->node is configured only when CONFIG_NUMA=y, so it is a good idea to have inline functions to access this field in order to avoid ifdef's in c files. Link: http://lkml.kernel.org/r/20180730101757.28058-3-osalvador@techadventures.net Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Signed-off-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Oscar Salvador <osalvador@suse.de> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Aaron Lu <aaron.lu@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Pasha Tatashin <Pavel.Tatashin@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: convert printk(KERN_<LEVEL> to pr_<level>Joe Perches2016-03-171-4/+3
| | | | | | | | | | | | | | | | Most of the mm subsystem uses pr_<level> so make it consistent. Miscellanea: - Realign arguments - Add missing newline to format - kmemleak-test.c has a "kmemleak: " prefix added to the "Kmemleak testing" logging message via pr_fmt Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Tejun Heo <tj@kernel.org> [percpu] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: meminit: remove mminit_verify_page_linksMel Gorman2015-06-301-8/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | mminit_verify_page_links() is an extremely paranoid check that was introduced when memory initialisation was being heavily reworked. Profiles indicated that up to 10% of parallel memory initialisation was spent on checking this for every page. The cost could be reduced but in practice this check only found problems very early during the initialisation rewrite and has found nothing since. This patch removes an expensive unnecessary check. Signed-off-by: Mel Gorman <mgorman@suse.de> Tested-by: Nate Zimmer <nzimmer@sgi.com> Tested-by: Waiman Long <waiman.long@hp.com> Tested-by: Daniel J Blueman <daniel@numascale.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Robin Holt <robinmholt@gmail.com> Cc: Nate Zimmer <nzimmer@sgi.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Waiman Long <waiman.long@hp.com> Cc: Scott Norton <scott.norton@hp.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: meminit: initialise remaining struct pages in parallel with kswapdMel Gorman2015-06-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Only a subset of struct pages are initialised at the moment. When this patch is applied kswapd initialise the remaining struct pages in parallel. This should boot faster by spreading the work to multiple CPUs and initialising data that is local to the CPU. The user-visible effect on large machines is that free memory will appear to rapidly increase early in the lifetime of the system until kswapd reports that all memory is initialised in the kernel log. Once initialised there should be no other user-visibile effects. Signed-off-by: Mel Gorman <mgorman@suse.de> Tested-by: Nate Zimmer <nzimmer@sgi.com> Tested-by: Waiman Long <waiman.long@hp.com> Tested-by: Daniel J Blueman <daniel@numascale.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Robin Holt <robinmholt@gmail.com> Cc: Nate Zimmer <nzimmer@sgi.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Waiman Long <waiman.long@hp.com> Cc: Scott Norton <scott.norton@hp.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/mm_init.c: mark mminit_loglevel __meminitdataRasmus Villemoes2015-02-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | mminit_loglevel is only referenced from __init and __meminit functions, so we can mark it __meminitdata. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Rik van Riel <riel@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: David Rientjes <rientjes@google.com> Cc: Vishnu Pratap Singh <vishnu.ps@samsung.com> Cc: Pintu Kumar <pintu.k@samsung.com> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/mm_init.c: park mminit_verify_zonelist as __initRasmus Villemoes2015-02-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | The only caller of mminit_verify_zonelist is build_all_zonelists_init, which is annotated with __init, so it should be safe to also mark the former as __init, saving ~400 bytes of .text. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Rik van Riel <riel@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: David Rientjes <rientjes@google.com> Cc: Vishnu Pratap Singh <vishnu.ps@samsung.com> Cc: Pintu Kumar <pintu.k@samsung.com> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: bring back /sys/kernel/mmHugh Dickins2014-01-271-1/+1
| | | | | | | | | | | | | | | | | | Commit da29bd36224b ("mm/mm_init.c: make creation of the mm_kobj happen earlier than device_initcall") changed to pure_initcall(mm_sysfs_init). That's too early: mm_sysfs_init() depends on core_initcall(ksysfs_init) to have made the kernel_kobj directory "kernel" in which to create "mm". Make it postcore_initcall(mm_sysfs_init). We could use core_initcall(), and depend upon Makefile link order kernel/ mm/ fs/ ipc/ security/ ... as core_initcall(debugfs_init) and core_initcall(securityfs_init) do; but better not. Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/mm_init.c: make creation of the mm_kobj happen earlier than device_initcallPaul Gortmaker2014-01-231-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The use of __initcall is to be eventually replaced by choosing one from the prioritized groupings laid out in init.h header: pure_initcall 0 core_initcall 1 postcore_initcall 2 arch_initcall 3 subsys_initcall 4 fs_initcall 5 device_initcall 6 late_initcall 7 In the interim, all __initcall are mapped onto device_initcall, which as can be seen above, comes quite late in the ordering. Currently the mm_kobj is created with __initcall in mm_sysfs_init(). This means that any other initcalls that want to reference the mm_kobj have to be device_initcall (or later), otherwise we will for example, trip the BUG_ON(!kobj) in sysfs's internal_create_group(). This unfairly restricts those users; for example something that clearly makes sense to be an arch_initcall will not be able to choose that. However, upon examination, it is only this way for historical reasons (i.e. simply not reprioritized yet). We see that sysfs is ready quite earlier in init/main.c via: vfs_caches_init |_ mnt_init |_ sysfs_init well ahead of the processing of the prioritized calls listed above. So we can recategorize mm_sysfs_init to be a pure_initcall, which in turn allows any mm_kobj initcall users a wider range (1 --> 7) of initcall priorities to choose from. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: numa: Change page last {nid,pid} into {cpu,pid}Peter Zijlstra2013-10-091-9/+9
| | | | | | | | | | | | | | | | | Change the per page last fault tracking to use cpu,pid instead of nid,pid. This will allow us to try and lookup the alternate task more easily. Note that even though it is the cpu that is store in the page flags that the mpol_misplaced decision is still based on the node. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1381141781-10992-43-git-send-email-mgorman@suse.de [ Fixed build failure on 32-bit systems. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
* sched/numa: Set preferred NUMA node based on number of private faultsMel Gorman2013-10-091-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ideally it would be possible to distinguish between NUMA hinting faults that are private to a task and those that are shared. If treated identically there is a risk that shared pages bounce between nodes depending on the order they are referenced by tasks. Ultimately what is desirable is that task private pages remain local to the task while shared pages are interleaved between sharing tasks running on different nodes to give good average performance. This is further complicated by THP as even applications that partition their data may not be partitioning on a huge page boundary. To start with, this patch assumes that multi-threaded or multi-process applications partition their data and that in general the private accesses are more important for cpu->memory locality in the general case. Also, no new infrastructure is required to treat private pages properly but interleaving for shared pages requires additional infrastructure. To detect private accesses the pid of the last accessing task is required but the storage requirements are a high. This patch borrows heavily from Ingo Molnar's patch "numa, mm, sched: Implement last-CPU+PID hash tracking" to encode some bits from the last accessing task in the page flags as well as the node information. Collisions will occur but it is better than just depending on the node information. Node information is then used to determine if a page needs to migrate. The PID information is used to detect private/shared accesses. The preferred NUMA node is selected based on where the maximum number of approximately private faults were measured. Shared faults are not taken into consideration for a few reasons. First, if there are many tasks sharing the page then they'll all move towards the same node. The node will be compute overloaded and then scheduled away later only to bounce back again. Alternatively the shared tasks would just bounce around nodes because the fault information is effectively noise. Either way accounting for shared faults the same as private faults can result in lower performance overall. The second reason is based on a hypothetical workload that has a small number of very important, heavily accessed private pages but a large shared array. The shared array would dominate the number of faults and be selected as a preferred node even though it's the wrong decision. The third reason is that multiple threads in a process will race each other to fault the shared page making the fault information unreliable. Signed-off-by: Mel Gorman <mgorman@suse.de> [ Fix complication error when !NUMA_BALANCING. ] Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1381141781-10992-30-git-send-email-mgorman@suse.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
* mm: tune vm_committed_as percpu_counter batching sizeTim Chen2013-07-031-0/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the per cpu counter's batch size for memory accounting is configured as twice the number of cpus in the system. However, for system with very large memory, it is more appropriate to make it proportional to the memory size per cpu in the system. For example, for a x86_64 system with 64 cpus and 128 GB of memory, the batch size is only 2*64 pages (0.5 MB). So any memory accounting changes of more than 0.5MB will overflow the per cpu counter into the global counter. Instead, for the new scheme, the batch size is configured to be 0.4% of the memory/cpu = 8MB (128 GB/64 /256), which is more inline with the memory size. I've done a repeated brk test of 800KB (from will-it-scale test suite) with 80 concurrent processes on a 4 socket Westmere machine with a total of 40 cores. Without the patch, about 80% of cpu is spent on spin-lock contention within the vm_committed_as counter. With the patch, there's a 73x speedup on the benchmark and the lock contention drops off almost entirely. [akpm@linux-foundation.org: fix section mismatch] Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Cc: Tejun Heo <tj@kernel.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: init: report on last-nid information stored in page->flagsMel Gorman2013-02-231-12/+19
| | | | | | | | | | | | | | | | | | | Answering the question "how much space remains in the page->flags" is time-consuming. mminit_loglevel can help answer the question but it does not take last_nid information into account. This patch corrects it and while there it corrects the messages related to page flag usage, pgshifts and node/zone id. When applied the relevant output looks something like this but will depend on the kernel configuration. mminit::pageflags_layout_widths Section 0 Node 9 Zone 2 Lastnid 9 Flags 25 mminit::pageflags_layout_shifts Section 19 Node 9 Zone 2 Lastnid 9 mminit::pageflags_layout_pgshifts Section 0 Node 55 Zone 53 Lastnid 44 mminit::pageflags_layout_nodezoneid Node/Zone ID: 64 -> 53 mminit::pageflags_layout_usage location: 64 -> 44 layout 44 -> 25 unused 25 -> 0 page-flags Signed-off-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: Map most files to use export.h instead of module.hPaul Gortmaker2011-10-311-1/+1
| | | | | | | | The files changed within are only using the EXPORT_SYMBOL macro variants. They are not using core modular infrastructure and hence don't need module.h but only the export.h header. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* mm: mminit_loglevel cannot be __meminitdata anymoreMarcin Slusarz2008-08-201-1/+1
| | | | | | | | | | | | | | | | | | | | | mminit_loglevel is now used from mminit_verify_zonelist <- build_all_zonelists <- 1. online_pages <- memory_block_action <- memory_block_change_state <- store_mem_state (sys handler) 2. numa_zonelist_order_handler (proc handler) so it cannot be annotated __meminit - drop it fixes following section mismatch warning: WARNING: vmlinux.o(.text+0x71628): Section mismatch in reference from the function mminit_verify_zonelist() to the variable .meminit.data:mminit_loglevel The function mminit_verify_zonelist() references the variable __meminitdata mminit_loglevel. This is often because mminit_verify_zonelist lacks a __meminitdata annotation or the annotation of mminit_loglevel is wrong. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm_init.c: avoid ifdef-inside-macro-expansionAndrew Morton2008-08-051-4/+4
| | | | | | | | | | | | | | | | | | | gcc-3.2: mm/mm_init.c:77:1: directives may not be used inside a macro argument mm/mm_init.c:76:47: unterminated argument list invoking macro "mminit_dprintk" mm/mm_init.c: In function `mminit_verify_pageflags_layout': mm/mm_init.c:80: `mminit_dprintk' undeclared (first use in this function) mm/mm_init.c:80: (Each undeclared identifier is reported only once mm/mm_init.c:80: for each function it appears in.) mm/mm_init.c:80: syntax error before numeric constant Also fix a typo in a comment. Reported-by: Adrian Bunk <bunk@kernel.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: create /sys/kernel/mmNishanth Aravamudan2008-07-241-0/+16
| | | | | | | | | | | | | | | Add a kobject to create /sys/kernel/mm when sysfs is mounted. The kobject will exist regardless. This will allow for the hugepage related sysfs directories to exist under the mm "subsystem" directory. Add an ABI file appropriately. [kosaki.motohiro@jp.fujitsu.com: fix build] Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: remove mm_init compilation dependency on CONFIG_DEBUG_MEMORY_INITNishanth Aravamudan2008-07-241-0/+2
| | | | | | | | | | | | | | Towards the end of putting all core mm initialization in mm_init.c, I plan on putting the creation of a mm kobject in a function in that file. However, the file is currently only compiled if CONFIG_DEBUG_MEMORY_INIT is set. Remove this dependency, but put the code under an #ifdef on the same config option. This should result in no functional changes. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: print out the zonelists on request for manual verificationMel Gorman2008-07-241-0/+45
| | | | | | | | | | | | This patch prints out the zonelists during boot for manual verification by the user if the mminit_loglevel is MMINIT_VERIFY or higher. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: verify the page links and memory modelMel Gorman2008-07-241-0/+71
| | | | | | | | | | | | | | | | | | Print out information on how the page flags are being used if mminit_loglevel is MMINIT_VERIFY or higher and unconditionally performs sanity checks on the flags regardless of loglevel. When the page flags are updated with section, node and zone information, a check are made to ensure the values can be retrieved correctly. Finally we confirm that pfn_to_page and page_to_pfn are the correct inverse functions. [akpm@linux-foundation.org: fix printk warnings] Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: add a basic debugging framework for memory initialisationMel Gorman2008-07-241-0/+18
Boot initialisation is very complex, with significant numbers of architecture-specific routines, hooks and code ordering. While significant amounts of the initialisation is architecture-independent, it trusts the data received from the architecture layer. This is a mistake, and has resulted in a number of difficult-to-diagnose bugs. This patchset adds some validation and tracing to memory initialisation. It also introduces a few basic defensive measures. The validation code can be explicitly disabled for embedded systems. This patch: Add additional debugging and verification code for memory initialisation. Once enabled, the verification checks are always run and when required additional debugging information may be outputted via a mminit_loglevel= command-line parameter. The verification code is placed in a new file mm/mm_init.c. Ideally other mm initialisation code will be moved here over time. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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