13 Jan, 2012
1 commit
-
Acked-by: David Rientjes
Cc: Pekka Enberg
Cc: "Rafael J. Wysocki"
Signed-off-by: Stanislaw Gruszka
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Nov, 2011
1 commit
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slub_max_order default is 3 (aka PAGE_ALLOC_COSTLY_ORDER), not 1
Acked-by: David Rientjes
Acked-by: Christoph Lameter
Signed-off-by: Eric Dumazet
Signed-off-by: Pekka Enberg
26 Oct, 2011
1 commit
25 Oct, 2011
1 commit
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (59 commits)
MAINTAINERS: linux-m32r is moderated for non-subscribers
linux@lists.openrisc.net is moderated for non-subscribers
Drop default from "DM365 codec select" choice
parisc: Kconfig: cleanup Kernel page size default
Kconfig: remove redundant CONFIG_ prefix on two symbols
cris: remove arch/cris/arch-v32/lib/nand_init.S
microblaze: add missing CONFIG_ prefixes
h8300: drop puzzling Kconfig dependencies
MAINTAINERS: microblaze-uclinux@itee.uq.edu.au is moderated for non-subscribers
tty: drop superfluous dependency in Kconfig
ARM: mxc: fix Kconfig typo 'i.MX51'
Fix file references in Kconfig files
aic7xxx: fix Kconfig references to READMEs
Fix file references in drivers/ide/
thinkpad_acpi: Fix printk typo 'bluestooth'
bcmring: drop commented out line in Kconfig
btmrvl_sdio: fix typo 'btmrvl_sdio_sd6888'
doc: raw1394: Trivial typo fix
CIFS: Don't free volume_info->UNC until we are entirely done with it.
treewide: Correct spelling of successfully in comments
...
28 Sep, 2011
1 commit
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There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.Fix these broken references, sometimes by dropping the irrelevant text
they were part of.Signed-off-by: Paul Bolle
Signed-off-by: Jiri Kosina
23 Sep, 2011
1 commit
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Commit e27e6151b154 ("mm/thp: use conventional format for boolean
attributes") changed/sys/kernel/mm/transparent_hugepage/khugepaged/defrag
to be tuned by using 1 (enabled) or 0 (disabled) instead of "yes" and
"no", respectively.Update the documentation.
Signed-off-by: David Rientjes
Signed-off-by: Linus Torvalds
01 Sep, 2011
1 commit
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slabinfo.c has been moved from Documentaion/vm/ to
tools/slub/ by commit:0d24db337e6d81c0c620ab65cc6947bd6553f742Update the slub.txt doc to reflect this change too.
Signed-off-by: Jason Liu
Acked-by: Christoph Lameter
Acked-by: David Rientjes
Signed-off-by: Pekka Enberg
16 Jun, 2011
1 commit
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According to commit 676db4af0430 ("cgroupfs: create /sys/fs/cgroup to
mount cgroupfs on") the canonical mountpoint for the cgroup filesystem
is /sys/fs/cgroup. Hence, this should be used in the documentation.Signed-off-by: Jörg Sommer
Acked-by: Paul Menage
Signed-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
27 May, 2011
2 commits
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem:
xen: cleancache shim to Xen Transcendent Memory
ocfs2: add cleancache support
ext4: add cleancache support
btrfs: add cleancache support
ext3: add cleancache support
mm/fs: add hooks to support cleancache
mm: cleancache core ops functions and config
fs: add field to superblock to support cleancache
mm/fs: cleancache documentationFix up trivial conflict in fs/btrfs/extent_io.c due to includes
-
This patchset introduces cleancache, an optional new feature exposed
by the VFS layer that potentially dramatically increases page cache
effectiveness for many workloads in many environments at a negligible
cost. It does this by providing an interface to transcendent memory,
which is memory/storage that is not otherwise visible to and/or directly
addressable by the kernel.Instead of being discarded, hooks in the reclaim code "put" clean
pages to cleancache. Filesystems that "opt-in" may "get" pages
from cleancache that were previously put, but pages in cleancache are
"ephemeral", meaning they may disappear at any time. And the size
of cleancache is entirely dynamic and unknowable to the kernel.
Filesystems currently supported by this patchset include ext3, ext4,
btrfs, and ocfs2. Other filesystems (especially those built entirely
on VFS) should be easy to add, but should first be thoroughly tested to
ensure coherency.Details and a FAQ are provided in Documentation/vm/cleancache.txt
This first patch of eight in this cleancache series only adds two
new documentation files.[v8: minor documentation changes by author]
[v3: akpm@linux-foundation.org: document sysfs API]
[v3: hch@infradead.org: move detailed description to Documentation/vm]
Signed-off-by: Dan Magenheimer
Reviewed-by: Jeremy Fitzhardinge
Reviewed-by: Konrad Rzeszutek Wilk
Acked-by: Andrew Morton
Acked-by: Randy Dunlap
Cc: Al Viro
Cc: Matthew Wilcox
Cc: Nick Piggin
Cc: Mel Gorman
Cc: Rik Van Riel
Cc: Jan Beulich
Cc: Chris Mason
Cc: Andreas Dilger
Cc: Ted Ts'o
Cc: Mark Fasheh
Cc: Joel Becker
Cc: Nitin Gupta
25 May, 2011
1 commit
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Straightforward conversion of i_mmap_lock to a mutex.
Signed-off-by: Peter Zijlstra
Acked-by: Hugh Dickins
Cc: Benjamin Herrenschmidt
Cc: David Miller
Cc: Martin Schwidefsky
Cc: Russell King
Cc: Paul Mundt
Cc: Jeff Dike
Cc: Richard Weinberger
Cc: Tony Luck
Cc: KAMEZAWA Hiroyuki
Cc: Mel Gorman
Cc: KOSAKI Motohiro
Cc: Nick Piggin
Cc: Namhyung Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
31 Mar, 2011
1 commit
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Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi
23 Mar, 2011
1 commit
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page-types.c doesn't supply a way to specify the debugfs path and the
original debugfs path is not usual on most machines. This patch supplies
a way to auto mount debugfs if needed.This patch is heavily inspired by tools/perf/utils/debugfs.c
[akpm@linux-foundation.org: make functions static]
[akpm@linux-foundation.org: fix debugfs_mount() signature]
Signed-off-by: Chen Gong
Reviewed-by: KOSAKI Motohiro
Reviewed-by: Wu Fengguang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Mar, 2011
1 commit
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commit 6837765963 ("mm: remove CONFIG_UNEVICTABLE_LRU config option")
has removed the configoption so we should sync up the doc as well.Signed-off-by: Michal Hocko
Signed-off-by: Jiri Kosina
14 Jan, 2011
1 commit
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Documentation/vm/transhuge.txt
Signed-off-by: Andrea Arcangeli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Nov, 2010
2 commits
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This patch fixes a build breakage introduced by commit
f5ac4916e9840292edd33c7a52b10364526547f3 ("slub: move slabinfo.c to
tools/slub/slabinfo.c") that was repoted by Stephen:After merging the slab tree, today's linux-next build (x86_64 allmodconfig)
failed like this:gcc: /scratch/sfr/next/Documentation/vm/slabinfo.c: No such file or directory
gcc: no input filesCaused by commit f5ac4916e9840292edd33c7a52b10364526547f3 ("slub: move
slabinfo.c to tools/slub/slabinfo.c"). Missing update to
Documentation/vm/Makefile?Reported-by: Stephen Rothwell
Signed-off-by: Pekka Enberg -
We now have a tools directory for these things.
Reviewed-by: KOSAKI Motohiro
Acked-by: David Rientjes
Signed-off-by: Christoph Lameter
Signed-off-by: Pekka Enberg
27 Oct, 2010
1 commit
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Document outlining some of the highmem issues, started by me, edited by
David.Signed-off-by: David Howells
Signed-off-by: Peter Zijlstra
Acked-by: Chris Metcalf
Cc: Hugh Dickins
Cc: Rik van Riel
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Steven Rostedt
Cc: Russell King
Cc: Ralf Baechle
Cc: David Miller
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Oct, 2010
1 commit
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* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
Update broken web addresses in arch directory.
Update broken web addresses in the kernel.
Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget
Revert "Fix typo: configuation => configuration" partially
ida: document IDA_BITMAP_LONGS calculation
ext2: fix a typo on comment in ext2/inode.c
drivers/scsi: Remove unnecessary casts of private_data
drivers/s390: Remove unnecessary casts of private_data
net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data
drivers/infiniband: Remove unnecessary casts of private_data
drivers/gpu/drm: Remove unnecessary casts of private_data
kernel/pm_qos_params.c: Remove unnecessary casts of private_data
fs/ecryptfs: Remove unnecessary casts of private_data
fs/seq_file.c: Remove unnecessary casts of private_data
arm: uengine.c: remove C99 comments
arm: scoop.c: remove C99 comments
Fix typo configue => configure in comments
Fix typo: configuation => configuration
Fix typo interrest[ing|ed] => interest[ing|ed]
Fix various typos of valid in comments
...Fix up trivial conflicts in:
drivers/char/ipmi/ipmi_si_intf.c
drivers/usb/gadget/rndis.c
net/irda/irnet/irnet_ppp.c
07 Oct, 2010
1 commit
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The page-types utility still uses an out of date name for the
unpoison interface: debugfs:hwpoison/renew-pfn
This patch renames and fixes it.Signed-off-by: Naoya Horiguchi
Acked-by: Wu Fengguang
Signed-off-by: Andi Kleen
21 Sep, 2010
1 commit
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Fix typo s/packages/packaged in Documentation/vm/numa_memory_policy.txt.
Signed-off-by: Nikanth Karthikesan
Signed-off-by: Jiri Kosina
06 Aug, 2010
1 commit
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Trivial typo fixes.
Signed-off-by: Tommi Rantala
Signed-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
28 May, 2010
1 commit
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Kamezawa Hiroyuki requested documentation for the numa_mem_id() and slab
related changes. He suggested Documentation/vm/numa for this
documentation. Looking at this file, it seems to me to be hopelessly out
of date relative to current Linux NUMA support. At the risk of going down
a rathole, I have made an attempt to rewrite the doc at a slightly higher
level [I think] and provide pointers to other in-tree documents and
out-of-tree man pages that cover the details.Let the games begin.
Signed-off-by: Lee Schermerhorn
Cc: Tejun Heo
Cc: Mel Gorman
Cc: Christoph Lameter
Cc: Nick Piggin
Cc: David Rientjes
Cc: Eric Whitney
Cc: KAMEZAWA Hiroyuki
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: "Luck, Tony"
Cc: Pekka Enberg
Cc: Randy Dunlap
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 May, 2010
1 commit
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documentation: slightly more correct value for MAP_HUGETLB in map_hugetlb.c
still not correct for alpha, mips, parisc or xtensa but working out of
the box in the most common architectures without having to deal with
complicated macros or including architecture specific headers.Signed-off-by: Carlo Marcelo Arenas Belon
Signed-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
23 Apr, 2010
1 commit
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Fix obvious cases of "it's" being used when "its" was meant.
Signed-off-by: Francis Galiegue
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina
13 Mar, 2010
1 commit
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Documentation/vm/:
Expose example and tool source files in the Documentation/ directory in
their own files instead of being buried (almost hidden) in readme/txt files.
This should help to prevent bitrot.This will make them more visible/usable to users who may need
to use them, to developers who may need to test with them, and
to anyone who would fix/update them if they were more visible.Also, if any of these possibly should not be in the kernel tree at
all, it will be clearer that they are here and we can discuss if
they should be removed.Also build the recently-added map_hugetlb.c.
Make several functions static to prevent linker warnings.Signed-off-by: Randy Dunlap
Acked-by: Eric B Munson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Feb, 2010
1 commit
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This patch allow to inject faults only for specific slabs.
In order to preserve default behavior cache filter is off by
default (all caches are faulty).One may define specific set of slabs like this:
# mark skbuff_head_cache as faulty
echo 1 > /sys/kernel/slab/skbuff_head_cache/failslab
# Turn on cache filter (off by default)
echo 1 > /sys/kernel/debug/failslab/cache-filter
# Turn on fault injection
echo 1 > /sys/kernel/debug/failslab/times
echo 1 > /sys/kernel/debug/failslab/probabilityAcked-by: David Rientjes
Acked-by: Akinobu Mita
Acked-by: Christoph Lameter
Signed-off-by: Dmitry Monakhov
Signed-off-by: Pekka Enberg
16 Dec, 2009
13 commits
-
Signed-off-by: Andi Kleen
-
The hwpoison test suite need to inject hwpoison to a collection of
selected task pages, and must not touch pages not owned by them and
thus kill important system processes such as init. (But it's OK to
mis-hwpoison free/unowned pages as well as shared clean pages.
Mis-hwpoison of shared dirty pages will kill all tasks, so the test
suite will target all or non of such tasks in the first place.)The memory cgroup serves this purpose well. We can put the target
processes under the control of a memory cgroup, and tell the hwpoison
injection code to only kill pages associated with some active memory
cgroup.The prerequisite for doing hwpoison stress tests with mem_cgroup is,
the mem_cgroup code tracks task pages _accurately_ (unless page is
locked). Which we believe is/should be true.The benefits are simplification of hwpoison injector code. Also the
mem_cgroup code will automatically be tested by hwpoison test cases.The alternative interfaces pin-pfn/unpin-pfn can also delegate the
(process and page flags) filtering functions reliably to user space.
However prototype implementation shows that this scheme adds more
complexity than we wanted.Example test case:
mkdir /cgroup/hwpoison
usemem -m 100 -s 1000 &
echo `jobs -p` > /cgroup/hwpoison/tasksmemcg_ino=$(ls -id /cgroup/hwpoison | cut -f1 -d' ')
echo $memcg_ino > /debug/hwpoison/corrupt-filter-memcgpage-types -p `pidof init` --hwpoison # shall do nothing
page-types -p `pidof usemem` --hwpoison # poison its pages[AK: Fix documentation]
[Add fix for problem noticed by Li Zefan ;
dentry in the css could be NULL]CC: KOSAKI Motohiro
CC: Hugh Dickins
CC: Daisuke Nishimura
CC: Balbir Singh
CC: KAMEZAWA Hiroyuki
CC: Li Zefan
CC: Paul Menage
CC: Nick Piggin
CC: Andi Kleen
Signed-off-by: Wu Fengguang
Signed-off-by: Andi Kleen -
When specified, only poison pages if ((page_flags & mask) == value).
- corrupt-filter-flags-mask
- corrupt-filter-flags-valueThis allows stress testing of many kinds of pages.
Strictly speaking, the buddy pages requires taking zone lock, to avoid
setting PG_hwpoison on a "was buddy but now allocated to someone" page.
However we can just do nothing because we set PG_locked in the beginning,
this prevents the page allocator from allocating it to someone. (It will
BUG() on the unexpected PG_locked, which is fine for hwpoison testing.)[AK: Add select PROC_PAGE_MONITOR to satisfy dependency]
CC: Nick Piggin
Signed-off-by: Wu Fengguang
Signed-off-by: Andi Kleen -
__memory_failure()'s workflow is
set PG_hwpoison
//...
unset PG_hwpoison if didn't pass hwpoison filterThat could kill unrelated process if it happens to page fault on the
page with the (temporary) PG_hwpoison. The race should be big enough to
appear in stress tests.Fix it by grabbing the page and checking filter at inject time. This
also avoids the very noisy "Injecting memory failure..." messages.- we don't touch madvise() based injection, because the filters are
generally not necessary for it.
- if we want to apply the filters to h/w aided injection, we'd better to
rearrange the logic in __memory_failure() instead of this patch.AK: fix documentation, use drain all, cleanups
CC: Haicheng Li
Signed-off-by: Wu Fengguang
Signed-off-by: Andi Kleen -
Filesystem data/metadata present the most tricky-to-isolate pages.
It requires careful code review and stress testing to get them right.The fs/device filter helps to target the stress tests to some specific
filesystem pages. The filter condition is block device's major/minor
numbers:
- corrupt-filter-dev-major
- corrupt-filter-dev-minor
When specified (non -1), only page cache pages that belong to that
device will be poisoned.The filters are checked reliably on the locked and refcounted page.
Haicheng: clear PG_hwpoison and drop bad page count if filter not OK
AK: Add documentationCC: Haicheng Li
CC: Nick Piggin
Signed-off-by: Wu Fengguang
Signed-off-by: Andi Kleen -
The unpoisoning interface is useful for stress testing tools to
reclaim poisoned pages (to prevent OOM)There is no hardware level unpoisioning, so this
cannot be used for real memory errors, only for software injected errors.Note that it may leak pages silently - those who have been removed from
LRU cache, but not isolated from page cache/swap cache at hwpoison time.
Especially the stress test of dirty swap cache pages shall reboot system
before exhausting memory.AK: Fix comments, add documentation, add printks, rename symbol
Signed-off-by: Wu Fengguang
Signed-off-by: Andi Kleen -
Signed-off-by: Wu Fengguang
Signed-off-by: Andi Kleen -
Now that ksm pages are swappable, and the known holes plugged, remove
mention of unswappable kernel pages from KSM documentation and comments.Remove the totalram_pages/4 initialization of max_kernel_pages. In fact,
remove max_kernel_pages altogether - we can reinstate it if removal turns
out to break someone's script; but if we later want to limit KSM's memory
usage, limiting the stable nodes would not be an effective approach.Signed-off-by: Hugh Dickins
Cc: Izik Eidus
Cc: Andrea Arcangeli
Cc: Chris Wright
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Register per node hstate attributes only for nodes with memory. As
suggested by David Rientjes.With Memory Hotplug, memory can be added to a memoryless node and a node
with memory can become memoryless. Therefore, add a memory on/off-line
notifier callback to [un]register a node's attributes on transition
to/from memoryless state.N.B., Only tested build, boot, libhugetlbfs regression.
i.e., no memory hotplug testing.Signed-off-by: Lee Schermerhorn
Reviewed-by: Andi Kleen
Acked-by: David Rientjes
Cc: KAMEZAWA Hiroyuki
Cc: Lee Schermerhorn
Cc: Mel Gorman
Cc: Randy Dunlap
Cc: Nishanth Aravamudan
Cc: Adam Litke
Cc: Andy Whitcroft
Cc: Eric Whitney
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Register per node hstate sysfs attributes only for nodes with memory.
Global replacement of 'all online nodes" with "all nodes with memory" in
mm/hugetlb.c. Suggested by David Rientjes.A subsequent patch will handle adding/removing of per node hstate sysfs
attributes when nodes transition to/from memoryless state via memory
hotplug.NOTE: this patch has not been tested with memoryless nodes.
Signed-off-by: Lee Schermerhorn
Reviewed-by: Andi Kleen
Cc: KAMEZAWA Hiroyuki
Cc: Mel Gorman
Cc: Randy Dunlap
Cc: Nishanth Aravamudan
Acked-by: David Rientjes
Cc: Adam Litke
Cc: Andy Whitcroft
Cc: Eric Whitney
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Update the kernel huge tlb documentation to describe the numa memory
policy based huge page management. Additionaly, the patch includes a fair
amount of rework to improve consistency, eliminate duplication and set the
context for documenting the memory policy interaction.Signed-off-by: Lee Schermerhorn
Acked-by: David Rientjes
Acked-by: Mel Gorman
Reviewed-by: Andi Kleen
Cc: KAMEZAWA Hiroyuki
Cc: Lee Schermerhorn
Cc: Randy Dunlap
Cc: Nishanth Aravamudan
Cc: Adam Litke
Cc: Andy Whitcroft
Cc: Eric Whitney
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On a system with large amount of memory (256GB), invoking page-types can
take quite a long time, which is unreasonable considering the user only
wants a description of the flags:# time ./page-types -d 0x10
0x0000000000000010 ____D_____________________________ dirtyreal 0m34.285s
user 0m1.966s
sys 0m32.313sThis is because we still walk the entire address range.
Exiting early seems like a reasonble solution:
# time ./page-types -d 0x10
0x0000000000000010 ____D_____________________________ dirtyreal 0m0.007s
user 0m0.001s
sys 0m0.005sSigned-off-by: Alex Chiang
Cc: Andi Kleen
Cc: Haicheng Li
Acked-by: Wu Fengguang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Align the output when page-type -h is invoked.
Signed-off-by: Alex Chiang
Acked-by: Wu Fengguang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
