Commit-ID: f11cfc6f294dbd83b0d58037404df2bd16066238 Gitweb: http://git.kernel.org/tip/f11cfc6f294dbd83b0d58037404df2bd16066238 Author: Pekka Enberg <penberg@xxxxxxxxxx> AuthorDate: Tue, 15 Oct 2013 23:07:27 +0300 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Mon, 21 Oct 2013 17:33:22 -0300 perf list: Show error if tracepoints not available Tracepoints are not visible in "perf list" on Fedora 19 because regular users have no permission to /sys/kernel/debug by default. Show an error message so that the user knows about it instead of assuming that tracepoints are not supported on the system. Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx> Acked-by: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Link: http://lkml.kernel.org/r/1381867647-8594-1-git-send-email-penberg@xxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- tools/perf/util/parse-events.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 9812531..c90e55c 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -998,8 +998,10 @@ void print_tracepoint_events(const char *subsys_glob, const char *event_glob, char evt_path[MAXPATHLEN]; char dir_path[MAXPATHLEN]; - if (debugfs_valid_mountpoint(tracing_events_path)) + if (debugfs_valid_mountpoint(tracing_events_path)) { + printf(" [ Tracepoints not available: %s ]\n", strerror(errno)); return; + } sys_dir = opendir(tracing_events_path); if (!sys_dir) -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html