From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754152Ab3KDUVT (ORCPT ); Mon, 4 Nov 2013 15:21:19 -0500 Received: from terminus.zytor.com ([198.137.202.10]:49983 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752343Ab3KDUVO (ORCPT ); Mon, 4 Nov 2013 15:21:14 -0500 Date: Mon, 4 Nov 2013 12:20:52 -0800 From: tip-bot for Adrian Hunter Message-ID: Cc: acme@redhat.com, linux-kernel@vger.kernel.org, eranian@google.com, paulus@samba.org, mingo@redhat.com, hpa@zytor.com, mingo@kernel.org, a.p.zijlstra@chello.nl, efault@gmx.de, namhyung@gmail.com, jolsa@redhat.com, fweisbec@gmail.com, adrian.hunter@intel.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, mingo@redhat.com, paulus@samba.org, eranian@google.com, linux-kernel@vger.kernel.org, acme@redhat.com, a.p.zijlstra@chello.nl, efault@gmx.de, namhyung@gmail.com, jolsa@redhat.com, fweisbec@gmail.com, dsahern@gmail.com, adrian.hunter@intel.com, tglx@linutronix.de In-Reply-To: <1383313899-15987-6-git-send-email-adrian.hunter@intel.com> References: <1383313899-15987-6-git-send-email-adrian.hunter@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf evlist: Add a debug print if event buffer mmap fails Git-Commit-ID: 026359658aecd348bc5c4a136a26f204b169103b X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.1 (terminus.zytor.com [127.0.0.1]); Mon, 04 Nov 2013 12:20:57 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 026359658aecd348bc5c4a136a26f204b169103b Gitweb: http://git.kernel.org/tip/026359658aecd348bc5c4a136a26f204b169103b Author: Adrian Hunter AuthorDate: Fri, 1 Nov 2013 15:51:33 +0200 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 4 Nov 2013 12:21:41 -0300 perf evlist: Add a debug print if event buffer mmap fails Add a debug print if mmap of the perf event ring buffer fails. Signed-off-by: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1383313899-15987-6-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evlist.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 0582f67..1c173cc 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -607,6 +607,8 @@ static int __perf_evlist__mmap(struct perf_evlist *evlist, evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, MAP_SHARED, fd, 0); if (evlist->mmap[idx].base == MAP_FAILED) { + pr_debug2("failed to mmap perf event ring buffer, error %d\n", + errno); evlist->mmap[idx].base = NULL; return -1; }