From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751412Ab3CUSei (ORCPT ); Thu, 21 Mar 2013 14:34:38 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:62788 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750879Ab3CUSeh (ORCPT ); Thu, 21 Mar 2013 14:34:37 -0400 Subject: [PATCH] Adding an error message to indicate perf_event cgroup subsys not mounted. From: Will Auld Reply-To: will.auld@intel.com To: linux-kernel@vger.kernel.org Cc: acme@redhat.com, eranian@google.com, andi.kleen@intel.com, will.auld@intel.com Content-Type: text/plain; charset="UTF-8" Organization: Intel Date: Thu, 21 Mar 2013 11:29:20 -0700 Message-ID: <1363890560.21957.4.camel@WGA-RHEL6.3> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 (2.28.3-24.el6) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding an error message to indicate that there is no mounted perf_event cgroup while using -G or --cgroup options with perf. Signed-off-by: Will Auld --- tools/perf/util/cgroup.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c index 96bbda1..4126beb 100644 --- a/tools/perf/util/cgroup.c +++ b/tools/perf/util/cgroup.c @@ -44,8 +44,10 @@ cgroupfs_find_mountpoint(char *buf, size_t maxlen) break; } fclose(fp); - if (!found) + if (!found) { + error("No cgroup mounted with \'perf_event\' type"); return -1; + } if (strlen(mountpoint) < maxlen) { strcpy(buf, mountpoint); -- 1.7.1