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authorKonstantin Khlebnikov <khlebnikov@yandex-team.ru>2017-08-20 14:39:20 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-08-22 13:24:54 -0300
commitac0bb6b72f4bbab08f270a919406d971e73698b5 (patch)
tree4d287b876d31e0e4cb27401bc222aee61e177fb7 /tools/perf
parent2826478a6660158d261bc49ad8954a8f5c39be07 (diff)
downloadop-kernel-dev-ac0bb6b72f4bbab08f270a919406d971e73698b5.zip
op-kernel-dev-ac0bb6b72f4bbab08f270a919406d971e73698b5.tar.gz
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.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 5dfb8bc..a5888c7 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"
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