linux-kernel - [tip:perf/core] perf tools: Fix CLOEXEC probe for perf_event

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Message-ID: <tip-a5b0153c880c2775bf5bdd78306f0a47e860ea04@git.kernel.org>
Date:	Thu, 14 Aug 2014 01:44:42 -0700
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, eranian@...gle.com,
	paulus@...ba.org, hpa@...or.com, mingo@...nel.org,
	jolsa@...nel.org, peterz@...radead.org, namhyung@...il.com,
	namhyung@...nel.org, jolsa@...hat.com, fweisbec@...il.com,
	adrian.hunter@...el.com, dsahern@...il.com, tglx@...utronix.de
Subject: [tip:perf/core] perf tools:
  Fix CLOEXEC probe for perf_event_paranoid == 2

Commit-ID:  a5b0153c880c2775bf5bdd78306f0a47e860ea04
Gitweb:     http://git.kernel.org/tip/a5b0153c880c2775bf5bdd78306f0a47e860ea04
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Tue, 12 Aug 2014 18:04:28 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 13 Aug 2014 15:58:08 -0300

perf tools: Fix CLOEXEC probe for perf_event_paranoid == 2

With /proc/sys/kernel/perf_event_paranoid set to 2, the probe of
PERF_FLAG_FD_CLOEXEC would fail.  Fix by excluding kernel profiling from
the probe event.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Acked-by: Namhyung Kim <namhyung@...nel.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1407855871-15024-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/cloexec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c
index 5073c01..000047c 100644
--- a/tools/perf/util/cloexec.c
+++ b/tools/perf/util/cloexec.c
@@ -11,6 +11,7 @@ static int perf_flag_probe(void)
 	struct perf_event_attr attr = {
 		.type = PERF_TYPE_SOFTWARE,
 		.config = PERF_COUNT_SW_CPU_CLOCK,
+		.exclude_kernel = 1,
 	};
 	int fd;
 	int err;
--
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