diff options
| author | Linux Build Service Account <lnxbuild@localhost> | 2016-09-19 23:27:57 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2016-09-19 23:27:57 -0700 |
| commit | f6ee052d8011b249e34d782e018bfa222b78a8e3 (patch) | |
| tree | 9b4bf673aa168bb0ae044c072c83be177f082c79 /tools/perf | |
| parent | 646ce8a9057216bc2daed8cb5618096ca5e95dce (diff) | |
| parent | a647f40d2b02cbc0456037de049d4d9e53083420 (diff) | |
Merge "BACKPORT: perf tools: Document the perf sysctls"
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/evsel.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 397fb4ed3c97..d4913a46ee1c 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2313,12 +2313,15 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, case EPERM: case EACCES: return scnprintf(msg, size, - "You may not have permission to collect %sstats.\n" - "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n" - " -1 - Not paranoid at all\n" - " 0 - Disallow raw tracepoint access for unpriv\n" - " 1 - Disallow cpu events for unpriv\n" - " 2 - Disallow kernel profiling for unpriv", + "You may not have permission to collect %sstats.\n\n" + "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n" + "which controls use of the performance events system by\n" + "unprivileged users (without CAP_SYS_ADMIN).\n\n" + "The default value is 1:\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" + ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n" + ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN", target->system_wide ? "system-wide " : ""); case ENOENT: return scnprintf(msg, size, "The %s event is not supported.", |