- 04 Feb, 2016 10 commits
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Taeung Song authored
Explain 'top.children' variable. Signed-off-by:
Taeung Song <treeze.taeung@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1454577913-16401-5-git-send-email-treeze.taeung@gmail.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Taeung Song authored
Explain 'report' section's variables: 'percent-limit', 'queue-size' and 'children'. Signed-off-by:
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Taeung Song authored
Explain 'call-graph' section and its variables: 'record-mode', 'dump-size', 'print-type', 'order', 'sort-key', 'threshold' and 'print-limit'. Signed-off-by:
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Taeung Song authored
This option controls display of column headers (like 'Overhead' and 'Symbol') in 'report' and 'top'. If this option is false, they are hidden. This option is only applied to TUI. Signed-off-by:
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Arnaldo Carvalho de Melo authored
So that we do less visual searching on the 'make build-test' output to see the feature related variables: After: $ make -C tools/perf build-test <SNIP> make_no_newt_O: cd . && make NO_NEWT=1 FEATURES_DUMP=/home/acme/git/linux/tools/perf/BUILD_TEST_FEATURE_DUMP O=/tmp/tmp.dz55IX DESTDIR=/tmp/tmp.X29xxo make_tags_O: cd . && make tags FEATURES_DUMP=/home/acme/git/linux/tools/perf/BUILD_TEST_FEATURE_DUMP O=/tmp/tmp.6ecLh8 DESTDIR=/tmp/tmp.6vIla578Ho make_util_pmu_bison_o_O: cd . && make util/pmu-bison.o FEATURES_DUMP=/home/acme/git/linux/tools/perf/BUILD_TEST_FEATURE_DUMP O=/tmp/tmp.SVPM2G DESTDIR=/tmp/tmp.C0oAam Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-dx4krgzqa566v1pedrbrcchi@git.kernel.orgSigned-off-by: -
Arnaldo Carvalho de Melo authored
Since this is the name that 'make' will look for if no explicit -f file is passed. This in turn makes the output of 'build-test' more compact: Before: $ perf stat make -C tools/perf build-test <SNIP> cd . && make FEATURE_DUMP_COPY=/home/acme/git/linux/tools/perf/BUILD_TEST_FEATURE_DUMP feature-dump make_no_libaudit_O: cd . && make -f Makefile O=/tmp/tmp.tHIa0Kkk2Y DESTDIR=/tmp/tmp.foK7rckkVi NO_LIBAUDIT=1 FEATURES_DUMP=/home/acme/git/linux/tools/perf/BUILD_TEST_FEATURE_DUMP <SNIP> After: $ perf stat make -C tools/perf build-test <SNIP> make_no_libaudit_O: cd . && make O=/tmp/tmp.tHIa0Kkk2Y DESTDIR=/tmp/tmp.foK7rckkVi NO_LIBAUDIT=1 FEATURES_DUMP=/home/acme/git/linux/tools/perf/BUILD_TEST_FEATURE_DUMP <SNIP> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-m440lb8dkfsywsyah0htif6t@git.kernel.orgSigned-off-by: -
Ingo Molnar authored
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: New features: - Add 'L' hotkey to dynamicly set the percent threshold for histogram entries and callchains, i.e. dynamicly do what the --percent-limit command line option to 'top' and 'report' does. (Namhyung Kim) Infrastructure changes: - Per hists field and sort lists, that will be used, for instance, in the c2c tool (Jiri Olsa) Documentation changes: - Update documentation of --sort and --perf-limit options for 'perf report' (Namhyung Kim) Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Ingo Molnar authored
Signed-off-by: -
Ingo Molnar authored
Merge tag 'perf-urgent-for-mingo-2' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fix from Arnaldo Carvalho de Melo: - Fix 'perf stat' interval output values (Jiri Olsa) Signed-off-by:
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Ingo Molnar authored
Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes from Arnaldo Carvalho de Melo: - tracepoint_error() can receive e=NULL, robustify it, fixes a problem noticed with a very specific combination: Machine with Intel PT (e.g. Broadwell), kernel with no perf_event_attr.context_switch feature (e.g. 4.2) and unreadable tracefs (for instance !root users), making the fallback from perf_event_attr.context_switch to the sched:sched_switch tracepoint to fail reading its info from tracefs, fix it. (Adrian Hunter) - Fix segfault in intel PT, by making it follow the 'struct thread' lifetime cycle checking expectations, noticed for instance, when processing perf.data files with Intel PT data using 'perf script' and when exiting 'perf report' (Adrian Hunter) - Fix CFI usage from .eh_frame and .debug_frame, which sometimes requires that we fallback from .eh_frame to .debug_frame in architectures such as PowerPC (Hemant Kumar) Signed-off-by:
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- 03 Feb, 2016 30 commits
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Jiri Olsa authored
We broke interval data displays with commit: 3f416f22 ("perf stat: Do not clean event's private stats") This commit removed stats cleaning, which is important for '-r' option to carry counters data over the whole run. But it's necessary to clean it for interval mode, otherwise the displayed value is avg of all previous values. Before: $ perf stat -e cycles -a -I 1000 record # time counts unit events 1.000240796 75,216,287 cycles 2.000512791 107,823,524 cycles $ perf stat report # time counts unit events 1.000240796 75,216,287 cycles 2.000512791 91,519,906 cycles Now: $ perf stat report # time counts unit events 1.000240796 75,216,287 cycles 2.000512791 107,823,524 cycles Notice the second value being bigger (91,.. < 107,..). This could be easily verified by using perf script which displays raw stat data: $ perf script CPU THREAD VAL ENA RUN TIME EVENT 0 -1 23855779 1000209530 1000209530 1000240796 cycles 1 -1 33340397 1000224964 1000224964 1000240796 cycles 2 -1 15835415 1000226695 1000226695 1000240796 cycles 3 -1 2184696 1000228245 1000228245 1000240796 cycles 0 -1 97014312 2000514533 2000514533 2000512791 cycles 1 -1 46121497 2000543795 2000543795 2000512791 cycles 2 -1 32269530 2000543566 2000543566 2000512791 cycles 3 -1 7634472 2000544108 2000544108 2000512791 cycles The sum of the first 4 values is the first interval aggregated value: 23855779 + 33340397 + 15835415 + 2184696 = 75,216,287 The sum of the second 4 values minus first value is the second interval aggregated value: 97014312 + 46121497 + 32269530 + 7634472 - 75216287 = 107,823,524 Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1454485436-20639-1-git-send-email-jolsa@kernel.orgSigned-off-by:
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Linus Torvalds authored
Merge fixes from Andrew Morton: "18 fixes" [ The 18 fixes turned into 17 commits, because one of the fixes was a fix for another patch in the series that I just folded in by editing the patch manually - hopefully correctly - Linus ] * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm: fix memory leak in copy_huge_pmd() drivers/hwspinlock: fix race between radix tree insertion and lookup radix-tree: fix race in gang lookup mm/vmpressure.c: fix subtree pressure detection mm: polish virtual memory accounting mm: warn about VmData over RLIMIT_DATA Documentation: cgroup-v2: add memory.stat::sock description mm: memcontrol: drop superfluous entry in the per-memcg stats array drivers/scsi/sg.c: mark VMA as VM_IO to prevent migration proc: revert /proc/<pid>/maps [stack:TID] annotation numa: fix /proc/<pid>/numa_maps for hugetlbfs on s390 MAINTAINERS: update Seth email ocfs2/cluster: fix memory leak in o2hb_region_release lib/test-string_helpers.c: fix and improve string_get_size() tests thp: limit number of object to scan on deferred_split_scan() thp: change deferred_split_count() to return number of THP in queue thp: make split_queue per-node
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git://git.code.sf.net/p/openipmi/linux-ipmiLinus Torvalds authored
Pull IPMI fix from Corey Minyard: "Fix a compile error on IPMI when ACPI is disabled" * tag 'for-linus-4.5-2' of git://git.code.sf.net/p/openipmi/linux-ipmi: ipmi: put acpi.h with the other headers
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linuxLinus Torvalds authored
Pull DeviceTree fixes from Rob Herring: - Fix build error with *_OF_DECLARE() when used in modules - Add missing platform maintainers for dts files in MAINTAINERS * tag 'devicetree-fixes-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: of: drop symbols declared by _OF_DECLARE() from modules MAINTAINERS: Add missing platform maintainers for dts files
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git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds authored
Pull NFS client bugfix and cleanup from Trond Myklebust: "Bugfix: - pNFS: Fix for missing layoutreturn calls Cleanup: - pNFS: rename NFS_LAYOUT_RETURN_BEFORE_CLOSE for code clarity" * tag 'nfs-for-4.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFS: Cleanup - rename NFS_LAYOUT_RETURN_BEFORE_CLOSE pNFS: Fix missing layoutreturn calls
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull tracing fix from Steven Rostedt: "A cleanup to the stack tracer broke stack tracing on s390. Here's a simple fix to correct that issue" * tag 'trace-v4.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/stacktrace: Show entire trace if passed in function not found
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Hugh Dickins authored
Trinity is now hitting the WARN_ON_ONCE we added in v3.15 commit cda540ac ("mm: get_user_pages(write,force) refuse to COW in shared areas"). The warning has served its purpose, nobody was harmed by that change, so just remove the warning to generate less noise from Trinity. Which reminds me of the comment I wrongly left behind with that commit (but was spotted at the time by Kirill), which has since moved into a separate function, and become even more obscure: delete it. Reported-by:
Dave Jones <davej@codemonkey.org.uk> Suggested-by:
Kirill A. Shutemov <kirill@shutemov.name> Signed-off-by:
Hugh Dickins <hughd@google.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Tony Camuso authored
Enclosing '#include <linux/acpi.h>' within '#ifdef CONFIG_ACPI' is unnecessary, since it has its own conditional compile for CONFIG_ACPI. Commit 0fbcf4af ("ipmi: Convert the IPMI SI ACPI handling to a platform device") exposed this as a problem for platforms that do not support ACPI when it introduced a call to ACPI_PTR() macro outside of the CONFIG_ACPI conditional compile. This would have been perfectly acceptable if acpi.h were not conditionally excluded for the non-acpi platform, because the conditional compile within acpi.h defines ACPI_PTR() to return NULL when compiled for non acpi platforms. Signed-off-by:
Tony Camuso <tcamuso@redhat.com> Fixed commit reference in header to conform to standard. Signed-off-by:
Corey Minyard <cminyard@mvista.com>
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Matthew Wilcox authored
We allocate a pgtable but do not attach it to anything if the PMD is in a DAX VMA, causing it to leak. We certainly try to not free pgtables associated with the huge zero page if the zero page is in a DAX VMA, so I think this is the right solution. This needs to be properly audited. Signed-off-by:
Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Acked-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Matthew Wilcox authored
of_hwspin_lock_get_id() is protected by the RCU lock, which means that insertions can occur simultaneously with the lookup. If the radix tree transitions from a height of 0, we can see a slot with the indirect_ptr bit set, which will cause us to at least read random memory, and could cause other havoc. Fix this by using the newly introduced radix_tree_iter_retry(). Signed-off-by:
Matthew Wilcox <willy@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: <stable@vger.kernel.org> Signed-off-by:
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Matthew Wilcox authored
If the indirect_ptr bit is set on a slot, that indicates we need to redo the lookup. Introduce a new function radix_tree_iter_retry() which forces the loop to retry the lookup by setting 'slot' to NULL and turning the iterator back to point at the problematic entry. This is a pretty rare problem to hit at the moment; the lookup has to race with a grow of the radix tree from a height of 0. The consequences of hitting this race are that gang lookup could return a pointer to a radix_tree_node instead of a pointer to whatever the user had inserted in the tree. Fixes: cebbd29e ("radix-tree: rewrite gang lookup using iterator") Signed-off-by:
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Vladimir Davydov authored
When vmpressure is called for the entire subtree under pressure we mistakenly use vmpressure->scanned instead of vmpressure->tree_scanned when checking if vmpressure work is to be scheduled. This results in suppressing all vmpressure events in the legacy cgroup hierarchy. Fix it. Fixes: 8e8ae645 ("mm: memcontrol: hook up vmpressure to socket pressure") Signed-off-by:
Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by:
Johannes Weiner <hannes@cmpxchg.org> Acked-by:
Michal Hocko <mhocko@suse.com> Signed-off-by:
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Konstantin Khlebnikov authored
* add VM_STACK as alias for VM_GROWSUP/DOWN depending on architecture * always account VMAs with flag VM_STACK as stack (as it was before) * cleanup classifying helpers * update comments and documentation Signed-off-by:
Konstantin Khlebnikov <koct9i@gmail.com> Tested-by:
Sudip Mukherjee <sudipm.mukherjee@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by:
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Konstantin Khlebnikov authored
This patch provides a way of working around a slight regression introduced by commit 84638335 ("mm: rework virtual memory accounting"). Before that commit RLIMIT_DATA have control only over size of the brk region. But that change have caused problems with all existing versions of valgrind, because it set RLIMIT_DATA to zero. This patch fixes rlimit check (limit actually in bytes, not pages) and by default turns it into warning which prints at first VmData misuse: "mmap: top (795): VmData 516096 exceed data ulimit 512000. Will be forbidden soon." Behavior is controlled by boot param ignore_rlimit_data=y/n and by sysfs /sys/module/kernel/parameters/ignore_rlimit_data. For now it set to "y". [akpm@linux-foundation.org: tweak kernel-parameters.txt text[ Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Vegard Nossum <vegard.nossum@oracle.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Kees Cook <keescook@google.com> Cc: Willy Tarreau <w@1wt.eu> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Signed-off-by:
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Johannes Weiner authored
Signed-off-by:
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Johannes Weiner authored
MEM_CGROUP_STAT_NSTATS is just a delimiter for cgroup1 statistics, not an actual array entry. Reuse it for the first cgroup2 stat entry, like in the event array. Fixes: b2807f07 ("mm: memcontrol: add "sock" to cgroup2 memory.stat") Signed-off-by:
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Kirill A. Shutemov authored
Reduced testcase: #include <fcntl.h> #include <unistd.h> #include <sys/mman.h> #include <numaif.h> #define SIZE 0x2000 int main() { int fd; void *p; fd = open("/dev/sg0", O_RDWR); p = mmap(NULL, SIZE, PROT_EXEC, MAP_PRIVATE | MAP_LOCKED, fd, 0); mbind(p, SIZE, 0, NULL, 0, MPOL_MF_MOVE); return 0; } We shouldn't try to migrate pages in sg VMA as we don't have a way to update Sg_scatter_hold::pages accordingly from mm core. Let's mark the VMA as VM_IO to indicate to mm core that the VMA is not migratable. Signed-off-by:Dmitry Vyukov <dvyukov@google.com> Acked-by:
Vlastimil Babka <vbabka@suse.cz> Cc: Doug Gilbert <dgilbert@interlog.com> Cc: David Rientjes <rientjes@google.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Shiraz Hashim <shashim@codeaurora.org> Cc: Hugh Dickins <hughd@google.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: syzkaller <syzkaller@googlegroups.com> Cc: Kostya Serebryany <kcc@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Johannes Weiner authored
Commit b7643757 ("procfs: mark thread stack correctly in proc/<pid>/maps") added [stack:TID] annotation to /proc/<pid>/maps. Finding the task of a stack VMA requires walking the entire thread list, turning this into quadratic behavior: a thousand threads means a thousand stacks, so the rendering of /proc/<pid>/maps needs to look at a million combinations. The cost is not in proportion to the usefulness as described in the patch. Drop the [stack:TID] annotation to make /proc/<pid>/maps (and /proc/<pid>/numa_maps) usable again for higher thread counts. The [stack] annotation inside /proc/<pid>/task/<tid>/maps is retained, as identifying the stack VMA there is an O(1) operation. Siddesh said: "The end users needed a way to identify thread stacks programmatically and there wasn't a way to do that. I'm afraid I no longer remember (or have access to the resources that would aid my memory since I changed employers) the details of their requirement. However, I did do this on my own time because I thought it was an interesting project for me and nobody really gave any feedback then as to its utility, so as far as I am concerned you could roll back the main thread maps information since the information is available in the thread-specific files" Signed-off-by:
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Michael Holzheu authored
When working with hugetlbfs ptes (which are actually pmds) is not valid to directly use pte functions like pte_present() because the hardware bit layout of pmds and ptes can be different. This is the case on s390. Therefore we have to convert the hugetlbfs ptes first into a valid pte encoding with huge_ptep_get(). Currently the /proc/<pid>/numa_maps code uses hugetlbfs ptes without huge_ptep_get(). On s390 this leads to the following two problems: 1) The pte_present() function returns false (instead of true) for PROT_NONE hugetlb ptes. Therefore PROT_NONE vmas are missing completely in the "numa_maps" output. 2) The pte_dirty() function always returns false for all hugetlb ptes. Therefore these pages are reported as "mapped=xxx" instead of "dirty=xxx". Therefore use huge_ptep_get() to correctly convert the hugetlb ptes. Signed-off-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Reviewed-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: <stable@vger.kernel.org> [4.3+] Signed-off-by:
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Seth Jennings authored
Update/unify my contact info. The old email address will no longer work soon. Signed-off-by:
Seth Jennings <sjenning@redhat.com> Signed-off-by:
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Joseph Qi authored
o2hb_region_release currently doesn't free o2hb_debug_buf hr_db_elapsed_time and hr_db_pinned malloced in o2hb_debug_create. Also we should call debugfs_remove before freeing its data, to prevent the risk accessing debugfs rightly after its data has been freed. Signed-off-by:
Joseph Qi <joseph.qi@huawei.com> Reviewed-by:
Jiufei Xue <xuejiufei@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by:
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Vitaly Kuznetsov authored
Recently added commit 564b026f ("string_helpers: fix precision loss for some inputs") fixed precision issues for string_get_size() and broke tests. Fix and improve them: test both STRING_UNITS_2 and STRING_UNITS_10 at a time, better failure reporting, test small an huge values. Fixes: 564b026f ("string_helpers: fix precision loss for some inputs") Signed-off-by:
Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: James Bottomley <JBottomley@Odin.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Signed-off-by:
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Kirill A. Shutemov authored
If we have a lot of pages in queue to be split, deferred_split_scan() can spend unreasonable amount of time under spinlock with disabled interrupts. Let's cap number of pages to split on scan by sc->nr_to_scan. Signed-off-by:
Andrea Arcangeli <aarcange@redhat.com> Reviewed-by:
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Kirill A. Shutemov authored
I've got meaning of shrinker::count_objects() wrong: it should return number of potentially freeable objects, which is not necessary correlate with freeable memory. Returning 256 per THP in queue is not reasonable: shrinker::scan_objects() never called with nr_to_scan > 128 in my setup. Let's return 1 per THP and correct scan_object accordingly. Signed-off-by:
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Kirill A. Shutemov authored
Andrea Arcangeli suggested to make split queue per-node to improve scalability. Let's do it. Signed-off-by:
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Namhyung Kim authored
Add 'L' key action to change the percent limit applied to both of hist entries and callchains. Suggested-by:
Arnaldo Carvalho de Melo <acme@kernel.org> Signed-off-by:
Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1454508683-5735-4-git-send-email-namhyung@kernel.orgSigned-off-by:
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Namhyung Kim authored
The --percent-limit option was changed to be applied to callchains as well as to hist entries recently, but it missed to update the doc. Reported-by:
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Namhyung Kim authored
The description of the memory sort key (used by --mem-mode) was misplaced. Move it under the --sort option so that it can be referenced properly. Signed-off-by:
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Jiri Olsa authored
With the hist object having the perf_hpp_list we can now iterate sort format entries based in the hists object. Adding hists__for_each_sort_list macro to do that. Signed-off-by:
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Jiri Olsa authored
With the hist object having the perf_hpp_list we can now iterate output format entries based in the hists object. Adding hists__for_each_format macro to do that. Signed-off-by:
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