diff options
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2017-08-20 14:39:20 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-08-22 13:24:54 -0300 |
| commit | ac0bb6b72f4bbab08f270a919406d971e73698b5 (patch) | |
| tree | 4d287b876d31e0e4cb27401bc222aee61e177fb7 /tools/perf | |
| parent | 2826478a6660158d261bc49ad8954a8f5c39be07 (diff) | |
| download | talos-op-linux-ac0bb6b72f4bbab08f270a919406d971e73698b5.tar.gz talos-op-linux-ac0bb6b72f4bbab08f270a919406d971e73698b5.zip | |
perf: Fix documentation for sysctls perf_event_paranoid and perf_event_mlock_kb
Fix misprint CAP_IOC_LOCK -> CAP_IPC_LOCK. This capability have nothing
to do with raw tracepoints. This part is about bypassing mlock limits.
Sysctl kernel.perf_event_paranoid = -1 allows raw and ftrace function
tracepoints without CAP_SYS_ADMIN.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/150322916080.129746.11285255474738558340.stgit@buzz
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/evsel.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 5dfb8bc4db89..a5888c704e01 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2674,7 +2674,9 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, "unprivileged users (without CAP_SYS_ADMIN).\n\n" "The current value is %d:\n\n" " -1: Allow use of (almost) all events by all users\n" - ">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n" + " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n" + ">= 0: Disallow ftrace function tracepoint by users without CAP_SYS_ADMIN\n" + " Disallow raw tracepoint access by users without CAP_SYS_ADMIN\n" ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n" ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN\n\n" "To make this setting permanent, edit /etc/sysctl.conf too, e.g.:\n\n" |
