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Message-Id: <1382099356-4918-15-git-send-email-adrian.hunter@intel.com>
Date:	Fri, 18 Oct 2013 15:29:11 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 14/19] 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 <adrian.hunter@...el.com>
---
 tools/perf/util/evlist.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 07ba0a4..52e434a 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -600,6 +600,7 @@ 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\n");
 		evlist->mmap[idx].base = NULL;
 		return -1;
 	}
-- 
1.7.11.7

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