From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753708Ab3KANwS (ORCPT ); Fri, 1 Nov 2013 09:52:18 -0400 Received: from mga02.intel.com ([134.134.136.20]:23727 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753590Ab3KANwN (ORCPT ); Fri, 1 Nov 2013 09:52:13 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,535,1378882800"; d="scan'208";a="402156973" From: Adrian Hunter To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Ingo Molnar , linux-kernel@vger.kernel.org, David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Stephane Eranian Subject: [PATCH V3 05/11] perf evlist: Add a debug print if event buffer mmap fails Date: Fri, 1 Nov 2013 15:51:33 +0200 Message-Id: <1383313899-15987-6-git-send-email-adrian.hunter@intel.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1383313899-15987-1-git-send-email-adrian.hunter@intel.com> References: <1383313899-15987-1-git-send-email-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a debug print if mmap of the perf event ring buffer fails. Signed-off-by: Adrian Hunter --- 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; } -- 1.7.11.7