diff options
| author | Song Liu <songliubraving@fb.com> | 2019-02-04 11:31:40 -0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-02-14 13:31:11 -0300 |
| commit | 39f4a913d6d439178177cae8aa2e9a232160fd51 (patch) | |
| tree | 8c80a8796a7462d795f95fa8de2410b60df1b942 | |
| parent | 33937e599449c65dbd69c60d7e2255012427baed (diff) | |
| download | linux-39f4a913d6d439178177cae8aa2e9a232160fd51.tar.bz2 | |
perf utils: Silence "Couldn't synthesize bpf events" warning for EPERM
Synthesizing BPF events is only supported for root. Silent warning msg
when non-root user runs perf-record.
Reported-by: David Carrillo-Cisneros <davidca@fb.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Tested-by: David Carrillo-Cisneros <davidca@fb.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: kernel-team@fb.com
Link: http://lkml.kernel.org/r/20190204193140.719740-1-songliubraving@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/bpf-event.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c index 796ef793f4ce..62dda96b0096 100644 --- a/tools/perf/util/bpf-event.c +++ b/tools/perf/util/bpf-event.c @@ -236,8 +236,8 @@ int perf_event__synthesize_bpf_events(struct perf_tool *tool, pr_debug("%s: can't get next program: %s%s", __func__, strerror(errno), errno == EINVAL ? " -- kernel too old?" : ""); - /* don't report error on old kernel */ - err = (errno == EINVAL) ? 0 : -1; + /* don't report error on old kernel or EPERM */ + err = (errno == EINVAL || errno == EPERM) ? 0 : -1; break; } fd = bpf_prog_get_fd_by_id(id); |