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| author | Ingo Molnar <mingo@kernel.org> | 2016-02-03 10:58:46 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-02-03 10:58:46 +0100 |
| commit | 402e8db5c1e65b115f15f0c28cabe209647b1ee5 (patch) | |
| tree | c5f14a1d5620c0f2067cb88a6fb6d84f18ab4d58 /Documentation/sysctl | |
| parent | 34229b277480f46c1e9a19f027f30b074512e68b (diff) | |
| parent | 5ac76283b32b116c58e362e99542182ddcfc8262 (diff) | |
| download | lwn-402e8db5c1e65b115f15f0c28cabe209647b1ee5.tar.gz lwn-402e8db5c1e65b115f15f0c28cabe209647b1ee5.zip | |
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:
User visible changes:
- Rename the "colors.code" ~/.perfconfig variable to "colors.jump_arrows",
as it controls just the that UI element in the annotate browser (Taeung Song)
- Avoid trying to read ELF symtabs from device files, noticed while doing
memory profiling work (Jiri Olsa)
- Improve context detection when offering options in the hists browser,
i.e. some options don't make sense when the browser is not working with
a perf.data file ('perf top' mode), only in 'perf report' mode, like
scripting (Namhyung Kim)
Infrastructure changes:
- Elliminate duplication in the hists browser filter functions, getting the
common part into a function that receives callbacks for filtering by
DSO, thread, etc. (Namhyung Kim)
- Fix misleadingly indented assignment, found using
gcc6 -Wmisleading-indentation (Markus Trippelsdorf)
- Handle LLVM relocation oddities in libbpf, introducing a 'perf test' that
detects such problems and then fixing the problem, so that the test now
passes (Wang Nan)
- More improvements to the build infrastructure to allow reusing the
feature detection facilities (Wang Nan)
- Auto initialize the globals needed by cpu__max_{cpu,node}() routines
(Arnaldo Carvalho de Melo)
Documentation changes:
- Document the perf sysctls in Documentation/sysctl/kernel.txt (Ben Hutchings)
- Document a bunch more ~/.perfconfig knobs (Taeung Song)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/sysctl')
| -rw-r--r-- | Documentation/sysctl/kernel.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index a93b414672a7..f886fbb1ad05 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -58,6 +58,8 @@ show up in /proc/sys/kernel: - panic_on_stackoverflow - panic_on_unrecovered_nmi - panic_on_warn +- perf_cpu_time_max_percent +- perf_event_paranoid - pid_max - powersave-nap [ PPC only ] - printk @@ -639,6 +641,17 @@ allowed to execute. ============================================================== +perf_event_paranoid: + +Controls use of the performance events system by unprivileged +users (without CAP_SYS_ADMIN). The default value is 1. + + -1: Allow use of (almost) all events by all users +>=0: Disallow raw tracepoint access by users without CAP_IOC_LOCK +>=1: Disallow CPU event access by users without CAP_SYS_ADMIN +>=2: Disallow kernel profiling by users without CAP_SYS_ADMIN + +============================================================== pid_max: |