29 Mar, 2012
2 commits
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hugepage-mmap.c, hugepage-shm.c and map_hugetlb.c in Documentation/vm are
simple pass/fail tests, It's better to promote them to
tools/testing/selftests.Thanks suggestion of Andrew Morton about this. They all need firstly
setting up proper nr_hugepages and hugepage-mmap need to mount hugetlbfs.
So I add a shell script run_vmtests to do such work which will call the
three test programs and check the return value of them.Changes to original code including below:
a. add run_vmtests script
b. return error when read_bytes mismatch with writed bytes.
c. coding style fixes: do not use assignment in if condition[akpm@linux-foundation.org: build the targets before trying to execute them]
[akpm@linux-foundation.org: Documentation/vm/ no longer has a Makefile. Fixes "make clean"]
Signed-off-by: Dave Young
Cc: Wu Fengguang
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: Frederic Weisbecker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
tools/ is the better place for vm tools which are used by many people.
Moving them to tools also make them open to more users instead of hide in
Documentation folder.This patch moves page-types.c to tools/vm/page-types.c. Also add a
Makefile in tools/vm and fix two coding style problems: a) change const
arrary to 'const char * const', b) change a space to tab for indent.Signed-off-by: Dave Young
Acked-by: Wu Fengguang
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: Frederic Weisbecker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Mar, 2012
1 commit
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Pull cleancache changes from Konrad Rzeszutek Wilk:
"This has some patches for the cleancache API that should have been
submitted a _long_ time ago. They are basically cleanups:- rename of flush to invalidate
- moving reporting of statistics into debugfs
- use __read_mostly as necessary.
Oh, and also the MAINTAINERS file change. The files (except the
MAINTAINERS file) have been in #linux-next for months now. The late
addition of MAINTAINERS file is a brain-fart on my side - didn't
realize I needed that just until I was typing this up - and I based
that patch on v3.3 - so the tree is on top of v3.3."* tag 'stable/for-linus-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm:
MAINTAINERS: Adding cleancache API to the list.
mm: cleancache: Use __read_mostly as appropiate.
mm: cleancache: report statistics via debugfs instead of sysfs.
mm: zcache/tmem/cleancache: s/flush/invalidate/
mm: cleancache: s/flush/invalidate/
22 Mar, 2012
1 commit
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page-types, which is a common user of pagemap, gets aware of thp with this
patch. This helps system admins and kernel hackers know about how thp
works. Here is a sample output of page-types over a thp:$ page-types -p --raw --list
voffset offset len flags
...
7f9d40200 3f8400 1 ___U_lA____Ma_bH______t____________
7f9d40201 3f8401 1ff ________________T_____t____________flags page-count MB symbolic-flags long-symbolic-flags
0x0000000000410000 511 1 ________________T_____t____________ compound_tail,thp
0x000000000040d868 1 0 ___U_lA____Ma_bH______t____________ uptodate,lru,active,mmap,anonymous,swapbacked,compound_head,thpSigned-off-by: Naoya Horiguchi
Acked-by: Wu Fengguang
Reviewed-by: KAMEZAWA Hiroyuki
Acked-by: KOSAKI Motohiro
Cc: David Rientjes
Cc: Andi Kleen
Cc: Andrea Arcangeli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Mar, 2012
1 commit
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* stable/cleancache.v13:
mm: cleancache: Use __read_mostly as appropiate.
mm: cleancache: report statistics via debugfs instead of sysfs.
mm: zcache/tmem/cleancache: s/flush/invalidate/
mm: cleancache: s/flush/invalidate/
07 Mar, 2012
1 commit
-
Signed-off-by: Masanari Iida
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina
10 Feb, 2012
2 commits
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Correct spelling "implementatation" to "implementation" in
Documentation/vm/cleancache.txtSigned-off-by: Masanari Iida
Signed-off-by: Jiri Kosina -
Correct spelling "semphore" to "semaphore" in
Documentation/vm/unevictable-lru.txtSigned-off-by: Masanari Iida
Signed-off-by: Jiri Kosina
24 Jan, 2012
2 commits
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[v9: akpm@linux-foundation.org: sysfs->debugfs; no longer need Doc/ABI file]
Signed-off-by: Dan Magenheimer
Signed-off-by: Konrad Wilk
Cc: Jan Beulich
Acked-by: Seth Jennings
Cc: Jeremy Fitzhardinge
Cc: Hugh Dickins
Cc: Johannes Weiner
Cc: Nitin Gupta
Cc: Matthew Wilcox
Cc: Chris Mason
Cc: Rik Riel
Cc: Andrew Morton -
Per akpm suggestions alter the use of the term flush to be
invalidate. The next patch will do this across all MM.This change is completely cosmetic.
[v9: akpm@linux-foundation.org: change "flush" to "invalidate", part 3]
Signed-off-by: Dan Magenheimer
Cc: Kamezawa Hiroyuki
Cc: Jan Beulich
Reviewed-by: Seth Jennings
Cc: Jeremy Fitzhardinge
Cc: Hugh Dickins
Cc: Johannes Weiner
Cc: Nitin Gupta
Cc: Matthew Wilcox
Cc: Chris Mason
Cc: Rik Riel
Cc: Andrew Morton
[v10: Fixed fs: move code out of buffer.c conflict change]
Signed-off-by: Konrad Rzeszutek Wilk
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
-
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
3 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
