Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759743Ab3JOUHg (ORCPT ); Tue, 15 Oct 2013 16:07:36 -0400 Received: from mail-la0-f42.google.com ([209.85.215.42]:54693 "EHLO mail-la0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757504Ab3JOUHe (ORCPT ); Tue, 15 Oct 2013 16:07:34 -0400 From: Pekka Enberg To: linux-kernel@vger.kernel.org Cc: Pekka Enberg , Arnaldo Carvalho de Melo , Ingo Molnar Subject: [PATCH] perf list: Show error if tracepoints not available Date: Tue, 15 Oct 2013 23:07:27 +0300 Message-Id: <1381867647-8594-1-git-send-email-penberg@kernel.org> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1330 Lines: 36 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. Cc: Arnaldo Carvalho de Melo Cc: Ingo Molnar Signed-off-by: Pekka Enberg --- 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) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/