29 Apr, 2020
1 commit
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commit cf01699ee220c38099eb3e43ce3d10690c8b7060 upstream.
Commit 7ed1c1901fe5 ("tools: fix cross-compile var clobbering") moved
the setup of the CC variable to tools/scripts/Makefile.include to make
the behavior consistent across all the tools Makefiles.As the vm tools missed the include we end up with the wrong CC in a
cross-compiling evironment.Fixes: 7ed1c1901fe5 (tools: fix cross-compile var clobbering)
Signed-off-by: Lucas Stach
Signed-off-by: Andrew Morton
Cc: Martin Kelly
Cc:
Link: http://lkml.kernel.org/r/20200416104748.25243-1-l.stach@pengutronix.de
Signed-off-by: Linus Torvalds
Signed-off-by: Greg Kroah-Hartman
13 Jul, 2019
4 commits
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Passing more than one sorting option has undefined behaviour.
Add an explicit statement as such to the help menu, this also has the
advantage of highlighting all the sorting options.Link: http://lkml.kernel.org/r/20190426022622.4089-5-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Cc: Alexander Duyck
Cc: Brendan Gregg ,
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Jesper Dangaard Brouer
Cc: Joonsoo Kim
Cc: Mel Gorman
Cc: Michal Hocko
Cc: Pekka Enberg
Cc: Qian Cai
Cc: Tejun Heo
Cc: Vlastimil Babka
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We would like to get a better view of the level of fragmentation within
the SLUB allocator. Total number of partial slabs is an indicator of
fragmentation.Add a command line option (-P | --partial) to sort the slab list by total
number of partial slabs.Link: http://lkml.kernel.org/r/20190426022622.4089-4-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Cc: Alexander Duyck
Cc: Brendan Gregg ,
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Jesper Dangaard Brouer
Cc: Joonsoo Kim
Cc: Mel Gorman
Cc: Michal Hocko
Cc: Pekka Enberg
Cc: Qian Cai
Cc: Tejun Heo
Cc: Vlastimil Babka
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We would like to see how fragmented the SLUB allocator is, one window into
fragmentation is the total number of partial slabs.Currently `slabinfo -X` shows slabs sorted by loss and by size. We can
use this option to also show slabs sorted by number of partial slabs.Option '-X' can be used in conjunction with '-N' to control the number of
slabs shown e.g. list of top 5 slabs:slabinfo -X -N5
Add list of slabs ordered by number of partial slabs to output of
`slabinfo -X`.Link: http://lkml.kernel.org/r/20190426022622.4089-3-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Cc: Alexander Duyck
Cc: Brendan Gregg ,
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Jesper Dangaard Brouer
Cc: Joonsoo Kim
Cc: Mel Gorman
Cc: Michal Hocko
Cc: Pekka Enberg
Cc: Qian Cai
Cc: Tejun Heo
Cc: Vlastimil Babka
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
During recent discussion on LKML over SLAB vs SLUB it was suggested by
Jesper that it would be nice to have a tool to view the current
fragmentation of the slab allocators. CC list for this set is taken
from that thread.For SLUB we have all the information for this already exposed by the
kernel and also we have a userspace tool for displaying this info:tools/vm/slabinfo.c
Extend slabinfo to improve the fragmentation information by enabling
sorting of caches by number of partial slabs.Also add cache list sorted in this manner to the output of `slabinfo -X`.
This patch (of 4):
get_opt() has a spurious character within the option string. Remove it
and reorder the options in alphabetic order so that it is easier to keep
the options correct. Use the same ordering for command help output and
long option handling code.Link: http://lkml.kernel.org/r/20190426022622.4089-2-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Cc: Jesper Dangaard Brouer
Cc: Pekka Enberg
Cc: Vlastimil Babka
Cc: Christoph Lameter
Cc: David Rientjes
Cc: Joonsoo Kim
Cc: Tejun Heo
Cc: Qian Cai
Cc: Mel Gorman
Cc: Alexander Duyck
Cc: Michal Hocko
Cc: Brendan Gregg ,
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Jun, 2019
2 commits
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Based on 1 normalized pattern(s):
this software is licensed under the terms of the gnu general public
license version 2 as published by the free software foundation and
may be copied distributed and modified under those terms 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 detailsextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 285 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Alexios Zavras
Reviewed-by: Allison Randal
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de
Signed-off-by: Greg Kroah-Hartman -
Based on 1 normalized pattern(s):
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 version 2 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 find a copy of v2 of the gnu general public
license somewhere on your linux system if not write to the free
software foundation inc 59 temple place suite 330 boston ma 02111
1307 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 1 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Alexios Zavras
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.073926682@linutronix.de
Signed-off-by: Greg Kroah-Hartman
06 Mar, 2019
5 commits
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Attempt to make the usage comment for debug options a little cleaner.
Link: http://lkml.kernel.org/r/20190212001219.27769-5-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Acked-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Usage message uses spaces not tabspaces, a few tabspaces have snuck in
making the columns not align correctly when output.Align usage output columns using spaces instead of tabspaces.
Link: http://lkml.kernel.org/r/20190212001219.27769-4-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Acked-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Primarily the usage message lists options in alphabetic order however
there are a bunch of the options that are not in alphabetic order.Put options in alphabetic order.
Link: http://lkml.kernel.org/r/20190212001219.27769-3-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Acked-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently usage message list only a subset of the available options.
should list them all.Update options in usage massage to include all available options.
Link: http://lkml.kernel.org/r/20190212001219.27769-2-tobin@kernel.org
Signed-off-by: Tobin C. Harding
Acked-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
PG_balloon was introduced to implement page migration/compaction for
pages inflated in virtio-balloon. Nowadays, it is only a marker that a
page is part of virtio-balloon and therefore logically offline.We also want to make use of this flag in other balloon drivers - for
inflated pages or when onlining a section but keeping some pages offline
(e.g. used right now by XEN and Hyper-V via set_online_page_callback()).We are going to expose this flag to dump tools like makedumpfile. But
instead of exposing PG_balloon, let's generalize the concept of marking
pages as logically offline, so it can be reused for other purposes later
on.Rename PG_balloon to PG_offline. This is an indicator that the page is
logically offline, the content stale and that it should not be touched
(e.g. a hypervisor would have to allocate backing storage in order for
the guest to dump an unused page). We can then e.g. exclude such pages
from dumps.We replace and reuse KPF_BALLOON (23), as this shouldn't really harm
(and for now the semantics stay the same). In following patches, we
will make use of this bit also in other balloon drivers. While at it,
document PGTABLE.[akpm@linux-foundation.org: fix comment text, per David]
Link: http://lkml.kernel.org/r/20181119101616.8901-3-david@redhat.com
Signed-off-by: David Hildenbrand
Acked-by: Konstantin Khlebnikov
Acked-by: Michael S. Tsirkin
Acked-by: Pankaj gupta
Cc: Jonathan Corbet
Cc: Alexey Dobriyan
Cc: Mike Rapoport
Cc: Christian Hansen
Cc: Vlastimil Babka
Cc: "Kirill A. Shutemov"
Cc: Stephen Rothwell
Cc: Matthew Wilcox
Cc: Michal Hocko
Cc: Pavel Tatashin
Cc: Alexander Duyck
Cc: Naoya Horiguchi
Cc: Miles Chen
Cc: David Rientjes
Cc: Kazuhito Hagio
Cc: Arnd Bergmann
Cc: Baoquan He
Cc: Borislav Petkov
Cc: Boris Ostrovsky
Cc: Dave Young
Cc: Greg Kroah-Hartman
Cc: Haiyang Zhang
Cc: Juergen Gross
Cc: Julien Freche
Cc: Kairui Song
Cc: "K. Y. Srinivasan"
Cc: Len Brown
Cc: Lianbo Jiang
Cc: Michal Hocko
Cc: Nadav Amit
Cc: Omar Sandoval
Cc: Pavel Machek
Cc: Rafael J. Wysocki
Cc: "Rafael J. Wysocki"
Cc: Stefano Stabellini
Cc: Stephen Hemminger
Cc: Vitaly Kuznetsov
Cc: Xavier Deguillard
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jan, 2019
1 commit
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The example in comment does not useable because the output binary is
named "page_owner_sort", not "sort".Also add a reference to Documentation/vm/page_owner.rst
Link: http://lkml.kernel.org/r/1546515361-8317-1-git-send-email-miles.chen@mediatek.com
Signed-off-by: Miles Chen
Reviewed-by: Andrew Morton
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Dec, 2018
1 commit
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Because kpagecount_read() fakes success if map counts are not being
collected, clamp the page count passed to it by walk_pfn() to the pages
value returned by the preceding call to kpageflags_read().Link: http://lkml.kernel.org/r/1543962269-26116-1-git-send-email-anthony.yznaga@oracle.com
Fixes: 7f1d23e60718 ("tools/vm/page-types.c: include shared map counts")
Signed-off-by: Anthony Yznaga
Reviewed-by: Naoya Horiguchi
Cc: Vlastimil Babka
Cc: Matthew Wilcox
Cc: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Sep, 2018
2 commits
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debugfs_known_mountpoints[] is not used any more, so let's remove it.
Link: http://lkml.kernel.org/r/1535102651-19418-1-git-send-email-n-horiguchi@ah.jp.nec.com
Signed-off-by: Naoya Horiguchi
Reviewed-by: Andrew Morton
Cc: Matthew Wilcox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently we get the following compiler warning:
slabinfo.c:854:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if (s->object_size < min_objsize)
^due to the mismatch of signed/unsigned comparison. ->object_size and
->slab_size are never expected to be negative, so let's define them as
unsigned int.[n-horiguchi@ah.jp.nec.com: convert everything - none of these can be negative]
Link: http://lkml.kernel.org/r/20180826234947.GA9787@hori1.linux.bs1.fc.nec.co.jp
Link: http://lkml.kernel.org/r/1535103134-20239-1-git-send-email-n-horiguchi@ah.jp.nec.com
Signed-off-by: Naoya Horiguchi
Reviewed-by: Andrew Morton
Cc: Matthew Wilcox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Aug, 2018
2 commits
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Add a flag which causes page-types to use the kernels's idle page
tracking to mark pages idle. As the tool already prints the idle flag
if set, subsequent runs will show which pages have been accessed since
last run.[akpm@linux-foundation.org: simplify mark_page_idle()]
[chansen3@cisco.com: reorganize mark_page_idle() logic, add docs]
Link: http://lkml.kernel.org/r/20180706172237.21691-1-chansen3@cisco.com
Link: http://lkml.kernel.org/r/20180612153223.13174-1-chansen3@cisco.com
Signed-off-by: Christian Hansen
Reviewed-by: Andrew Morton
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a new flag that will read kpagecount for each PFN and print out the
number of times the page is mapped along with the flags in the listing
view.This information is useful in understanding and optimizing memory usage.
Identifying pages which are not shared allows us to focus on adjusting
the memory layout or access patterns for the sole owning process.
Knowing the number of processes that share a page tells us how many
other times we must make the same adjustments or how many processes to
potentially disable.Truncated sample output:
voffset map-cnt offset len flags
561a3591e 1 15fe8 1 ___U_lA____Ma_b___________________________
561a3591f 1 2b103 1 ___U_lA____Ma_b___________________________
561a36ca4 1 2cc78 1 ___U_lA____Ma_b___________________________
7f588bb4e 14 2273c 1 __RU_lA____M______________________________[akpm@linux-foundation.org: coding-style fixes]
[chansen3@cisco.com: add documentation, tweak whitespace]
Link: http://lkml.kernel.org/r/20180705181204.5529-1-chansen3@cisco.com
Link: http://lkml.kernel.org/r/20180612153205.12879-1-chansen3@cisco.com
Signed-off-by: Christian Hansen
Reviewed-by: Andrew Morton
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Jun, 2018
1 commit
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Define a new PageTable bit in the page_type and use it to mark pages in
use as page tables. This can be helpful when debugging crashdumps or
analysing memory fragmentation. Add a KPF flag to report these pages to
userspace and update page-types.c to interpret that flag.Note that only pages currently accounted as NR_PAGETABLES are tracked as
PageTable; this does not include pgd/p4d/pud/pmd pages. Those will be the
subject of a later patch.Link: http://lkml.kernel.org/r/20180518194519.3820-4-willy@infradead.org
Signed-off-by: Matthew Wilcox
Acked-by: Kirill A. Shutemov
Acked-by: Vlastimil Babka
Cc: Christoph Lameter
Cc: Dave Hansen
Cc: Jérôme Glisse
Cc: Lai Jiangshan
Cc: Martin Schwidefsky
Cc: Pekka Enberg
Cc: Randy Dunlap
Cc: Andrey Ryabinin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Feb, 2018
1 commit
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Currently a number of Makefiles break when used with toolchains that
pass extra flags in CC and other cross-compile related variables (such
as --sysroot).Thus we get this error when we use a toolchain that puts --sysroot in
the CC var:~/src/linux/tools$ make iio
[snip]
iio_event_monitor.c:18:10: fatal error: unistd.h: No such file or directory
#include
^~~~~~~~~~This occurs because we clobber several env vars related to
cross-compiling with lines like this:CC = $(CROSS_COMPILE)gcc
Although this will point to a valid cross-compiler, we lose any extra
flags that might exist in the CC variable, which can break toolchains
that rely on them (for example, those that use --sysroot).This easily shows up using a Yocto SDK:
$ . [snip]/sdk/environment-setup-cortexa8hf-neon-poky-linux-gnueabi
$ echo $CC
arm-poky-linux-gnueabi-gcc -march=armv7-a -mfpu=neon -mfloat-abi=hard
-mcpu=cortex-a8
--sysroot=[snip]/sdk/sysroots/cortexa8hf-neon-poky-linux-gnueabi$ echo $CROSS_COMPILE
arm-poky-linux-gnueabi-$ echo ${CROSS_COMPILE}gcc
krm-poky-linux-gnueabi-gccAlthough arm-poky-linux-gnueabi-gcc is a cross-compiler, we've lost the
--sysroot and other flags that enable us to find the right libraries to
link against, so we can't find unistd.h and other libraries and headers.
Normally with the --sysroot flag we would find unistd.h in the sdk
directory in the sysroot:$ find [snip]/sdk/sysroots -path '*/usr/include/unistd.h'
[snip]/sdk/sysroots/cortexa8hf-neon-poky-linux-gnueabi/usr/include/unistd.hThe perf Makefile adds CC = $(CROSS_COMPILE)gcc if and only if CC is not
already set, and it compiles correctly with the above toolchain.So, generalize the logic that perf uses in the common Makefile and
remove the manual CC = $(CROSS_COMPILE)gcc lines from each Makefile.Note that this patch does not fix cross-compile for all the tools (some
have other bugs), but it does fix it for all except usb and acpi, which
still have other unrelated issues.I tested both with and without the patch on native and cross-build and
there appear to be no regressions.Link: http://lkml.kernel.org/r/20180107214028.23771-1-martin@martingkelly.com
Signed-off-by: Martin Kelly
Acked-by: Mark Brown
Cc: Tejun Heo
Cc: Li Zefan
Cc: Johannes Weiner
Cc: Linus Walleij
Cc: "K. Y. Srinivasan"
Cc: Haiyang Zhang
Cc: Stephen Hemminger
Cc: Jonathan Cameron
Cc: Pali Rohar
Cc: Richard Purdie
Cc: Jacek Anaszewski
Cc: Pavel Machek
Cc: Peter Zijlstra
Cc: Ingo Molnar
Cc: Arnaldo Carvalho de Melo
Cc: Robert Moore
Cc: Lv Zheng
Cc: "Rafael J. Wysocki"
Cc: Greg Kroah-Hartman
Cc: Valentina Manea
Cc: Shuah Khan
Cc: Mario Limonciello
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Feb, 2018
1 commit
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page-types currently hardcodes /proc/kpageflags as the file to parse.
This works when using the tool to examine the state of pageflags on the
same system, but does not allow storing a snapshot of pageflags at a
given time to debug issues nor on a different system.This allows the user to specify a saved version of kpageflags with a new
page-types -F option.[akpm@linux-foundation.org: add "filename" to fix usage() string]
[rientjes@google.com: fix layout]
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1801301840050.140969@chino.kir.corp.google.com
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1801301458180.153857@chino.kir.corp.google.com
Signed-off-by: David Rientjes
Reviewed-by: Andrew Morton
Reviewed-by: Naoya Horiguchi
Cc: Konstantin Khlebnikov
Cc: Vladimir Davydov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Dec, 2017
1 commit
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On some linux distributions, the default link of sh is dash which
deoesn't support split array like "${var//,/ }"It's better to force to use bash shell directly.
Link: http://lkml.kernel.org/r/20171208093751.GA175471@sofia
Signed-off-by: Liu Changcheng
Reviewed-by: Sergey Senozhatsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Nov, 2017
1 commit
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Patch series "oom: capture unreclaimable slab info in oom message", v10.
Recently we ran into a oom issue, kernel panic due to no killable
process. The dmesg shows huge unreclaimable slabs used almost 100%
memory, but kdump doesn't capture vmcore due to some reason.So, it may sound better to capture unreclaimable slab info in oom
message when kernel panic to aid trouble shooting and cover the corner
case. Since kernel already panic, so capturing more information sounds
worthy and doesn't bother normal oom killer.With the patchset, tools/vm/slabinfo has a new option, "-U", to show
unreclaimable slab only.And, oom will print all non zero (num_objs * size != 0) unreclaimable
slabs in oom killer message.This patch (of 3):
Add "-U" option to show unreclaimable slabs only.
"-U" and "-S" together can tell us what unreclaimable slabs use the most
memory to help debug huge unreclaimable slabs issue.Link: http://lkml.kernel.org/r/1507152550-46205-2-git-send-email-yang.s@alibaba-inc.com
Signed-off-by: Yang Shi
Acked-by: Christoph Lameter
Acked-by: David Rientjes
Cc: Pekka Enberg
Cc: Joonsoo Kim
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Nov, 2017
1 commit
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Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
23 Feb, 2017
1 commit
-
Currently the tools/vm Makefile has a rather arbitrary implicit build
rule; page-types is the first value in TARGETS so lets just build that
one! Additionally there is no install rule and this is needed for make -C
tools vm_install to work properly.Provide a more sensible implicit build rule and a new install rule.
Note that the variables names used by the install rule (DESTDIR and
sbindir) are copied from prior-art in tools/power/cpupower.Link: http://lkml.kernel.org/r/20170113165630.27541-1-daniel.thompson@linaro.org
Signed-off-by: Daniel Thompson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Jul, 2016
1 commit
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Page owner will be changed to store more deep stacktrace so current
temporary buffer size isn't enough. Increase it.Link: http://lkml.kernel.org/r/1464230275-25791-5-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim
Acked-by: Vlastimil Babka
Cc: Mel Gorman
Cc: Minchan Kim
Cc: Alexander Potapenko
Cc: Hugh Dickins
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Jul, 2016
1 commit
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The curly braces are missing here so we print stuff unintentionally.
Fixes: 9da4714a2d44 ('slub: slabinfo update for cmpxchg handling')
Link: http://lkml.kernel.org/r/20160715211243.GE19522@mwanda
Signed-off-by: Dan Carpenter
Acked-by: Christoph Lameter
Cc: Sergey Senozhatsky
Cc: Colin Ian King
Cc: Laura Abbott
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Jun, 2016
1 commit
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trivial fix to spelling mistake
Link: http://lkml.kernel.org/r/1466672144-831-1-git-send-email-colin.king@canonical.com
Signed-off-by: Colin Ian King
Acked-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Mar, 2016
3 commits
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I found that page-types is very slow and my testing shows many timeout
errors. Here's an example with a simple program allocating 1000 thps.$ time ./page-types -p $(pgrep -f test_alloc)
...
real 0m17.201s
user 0m16.889s
sys 0m0.312sMost of time is spent in memset(). Currently memset() clears over whole
buffer for every walk_pfn() call, which is inefficient when walk_pfn()
is called from walk_vma(), because in that case walk_pfn() is called for
each pfn. So this patch limits the zero initialization only for the
first element.$ time ./page-types.patched -p $(pgrep -f test_alloc)
...
real 0m0.182s
user 0m0.046s
sys 0m0.135sFixes: 954e95584579 ("tools/vm/page-types.c: add memory cgroup dumping and filtering")
Signed-off-by: Naoya Horiguchi
Suggested-by: Konstantin Khlebnikov
Cc: Vladimir Davydov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds two command line keys:
-c|--cgroup path|@inode Walk only pages owned by this memory cgroup
-C|--list-cgroup Show memory cgroup inodes[vdavydov@virtuozzo.com: opt_cgroup should be uint64_t. Fix conflicts with "tools/vm/page-types.c: support swap entry"]
Signed-off-by: Konstantin Khlebnikov
Cc: Naoya Horiguchi
Reviewed-by: Vladimir Davydov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
/proc/pid/pagemap (pte_to_pagemap_entry() internally) already reports
about swap entry, so let's make the in-kernel utility aware of it.Signed-off-by: Naoya Horiguchi
Cc: Vladimir Davydov
Cc: Konstantin Khlebnikov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Mar, 2016
1 commit
-
SLAB_DEBUG_FREE allows expensive consistency checks at free to be turned
on or off. Expand its use to be able to turn off all consistency
checks. This gives a nice speed up if you only want features such as
poisoning or tracing.Credit to Mathias Krause for the original work which inspired this
seriesSigned-off-by: Laura Abbott
Acked-by: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Cc: Kees Cook
Cc: Mathias Krause
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Nov, 2015
1 commit
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PageIdle is exported in include/uapi/linux/kernel-page-flags.h, so let's
make page-types.c tool handle it.Signed-off-by: Naoya Horiguchi
Reviewed-by: Vladimir Davydov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Nov, 2015
7 commits
-
GNUplot `slabinfo -X' stats, collected, for example, using the
following command:
while [ 1 ]; do slabinfo -X >> stats; sleep 1; done`slabinfo-gnuplot.sh stats' pre-processes collected records
and generate graphs (totals, slabs sorted by size, slabs
sorted by size).Graphs can be [individually] regenerate with different samples
range and graph width-heigh (-r %d,%d and -s %d,%d options).To visually compare N `totals' graphs:
slabinfo-gnuplot.sh -t FILE1-totals FILE2-totals ... FILEN-totalsSigned-off-by: Sergey Senozhatsky
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
checkpatch.pl complains about globals being explicitly zeroed
out: "ERROR: do not initialise globals to 0 or NULL".New globals, introduced in this patch set, have no explicit 0
initialization; clean up the old ones to make it less hairy.Signed-off-by: Sergey Senozhatsky
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce "-B|--Bytes" opt to disable store_size() dynamic
size scaling and report size in bytes instead.This `expands' the interface a bit, it's impossible to use
printf("%6s") anymore to output sizes.Example:
slabinfo -X -N 2
Slabcache Totals
----------------
Slabcaches : 91 Aliases : 119->69 Active: 63
Memory used: 199798784 # Loss : 10689376 MRatio: 5%
# Objects : 324301 # PartObj: 18151 ORatio: 5%Per Cache Average Min Max Total
----------------------------------------------------------------------------
#Objects 5147 1 89068 324301
#Slabs 199 1 3886 12537
#PartSlab 12 0 240 778
%PartSlab 32% 0% 100% 6%
PartObjs 5 0 4569 18151
% PartObj 26% 0% 100% 5%
Memory 3171409 8192 127336448 199798784
Used 3001736 160 121429728 189109408
Loss 169672 0 5906720 10689376Per Object Average Min Max
-----------------------------------------------------------
Memory 585 8 8192
User 583 8 8192
Loss 2 0 64Slabs sorted by size
--------------------
Name Objects Objsize Space Slabs/Part/Cpu O/S O %Fr %Ef Flg
ext4_inode_cache 69948 1736 127336448 3871/0/15 18 3 0 95 a
dentry 89068 288 26058752 3164/0/17 28 1 0 98 aSlabs sorted by loss
--------------------
Name Objects Objsize Loss Slabs/Part/Cpu O/S O %Fr %Ef Flg
ext4_inode_cache 69948 1736 5906720 3871/0/15 18 3 0 95 a
inode_cache 11628 864 537472 642/0/4 18 2 0 94 aBesides, store_size() does not use powers of two for G/M/K
if (value > 1000000000UL) {
divisor = 100000000UL;
trailer = 'G';
} else if (value > 1000000UL) {
divisor = 100000UL;
trailer = 'M';
} else if (value > 1000UL) {
divisor = 100;
trailer = 'K';
}Signed-off-by: Sergey Senozhatsky
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add "-X|--Xtotals" opt to output extended totals summary,
which includes:
-- totals summary
-- slabs sorted by size
-- slabs sorted by loss (waste)Example:
=======slabinfo --X -N 1
Slabcache Totals
----------------
Slabcaches : 91 Aliases : 120->69 Active: 65
Memory used: 568.3M # Loss : 30.4M MRatio: 5%
# Objects : 920.1K # PartObj: 161.2K ORatio: 17%Per Cache Average Min Max Total
---------------------------------------------------------
#Objects 14.1K 1 227.8K 920.1K
#Slabs 533 1 11.7K 34.7K
#PartSlab 86 0 4.3K 5.6K
%PartSlab 24% 0% 100% 16%
PartObjs 17 0 129.3K 161.2K
% PartObj 17% 0% 100% 17%
Memory 8.7M 8.1K 384.7M 568.3M
Used 8.2M 160 366.5M 537.9M
Loss 468.8K 0 18.2M 30.4MPer Object Average Min Max
---------------------------------------------
Memory 587 8 8.1K
User 584 8 8.1K
Loss 2 0 64Slabs sorted by size
----------------------
Name Objects Objsize Space Slabs/Part/Cpu O/S O %Fr %Ef Flg
ext4_inode_cache 211142 1736 384.7M 11732/40/10 18 3 0 95 aSlabs sorted by loss
----------------------
Name Objects Objsize Loss Slabs/Part/Cpu O/S O %Fr %Ef Flg
ext4_inode_cache 211142 1736 18.2M 11732/40/10 18 3 0 95 aSigned-off-by: Sergey Senozhatsky
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix mismatches between usage() output and real opts[] options. Add
missing alternative opt names, e.g., '-S' had no '--Size' opts[] entry,
etc.Signed-off-by: Sergey Senozhatsky
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce opt "-L|--sort-loss" to sort and output slabs by
loss (waste) in slabcache().Signed-off-by: Sergey Senozhatsky
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce opt "-N|--lines=K" to limit the number of slabs
being reported in output_slabs().Signed-off-by: Sergey Senozhatsky
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
