linux-kernel - [tip:perf/urgent] perf evsel: Fix attr.exclude

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Message-ID: <tip-bl6bbxzxloonzvm4nvt7oqgj@git.kernel.org>
Date:   Tue, 11 Jul 2017 01:49:25 -0700
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, hpa@...or.com,
        adrian.hunter@...el.com, namhyung@...nel.org, wangnan0@...wei.com,
        mingo@...nel.org, acme@...hat.com, tglx@...utronix.de,
        jolsa@...nel.org, dsahern@...il.com, luto@...nel.org
Subject: [tip:perf/urgent] perf evsel: Fix attr.exclude_kernel setting for
 default cycles:p

Commit-ID:  d37a369790774af66a4aee61a188384d21b17a43
Gitweb:     http://git.kernel.org/tip/d37a369790774af66a4aee61a188384d21b17a43
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Mon, 10 Jul 2017 16:08:07 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 10 Jul 2017 16:14:48 -0300

perf evsel: Fix attr.exclude_kernel setting for default cycles:p

To allow probing the max attr.precise_ip setting for non-root users
we unconditionally set attr.exclude_kernel, which makes the detection
work but should be done only for !root, fix it.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Fixes: 97365e81366f ("perf evsel: Set attr.exclude_kernel when probing max attr.precise_ip")
Link: http://lkml.kernel.org/n/tip-bl6bbxzxloonzvm4nvt7oqgj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/evsel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 87b4318..f2a1876 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -273,7 +273,7 @@ struct perf_evsel *perf_evsel__new_cycles(void)
 	struct perf_event_attr attr = {
 		.type	= PERF_TYPE_HARDWARE,
 		.config	= PERF_COUNT_HW_CPU_CYCLES,
-		.exclude_kernel	= 1,
+		.exclude_kernel	= geteuid() != 0,
 	};
 	struct perf_evsel *evsel;