linux-kernel - [tip:perf/core] perf tests: Set evlist of test__task

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Message-ID: <tip-a0e3dd79cdd8ad838cbcefeff530a15193f8336e@git.kernel.org>
Date:   Sat, 18 Nov 2017 00:31:37 -0800
From:   tip-bot for Wang Nan <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     acme@...hat.com, mingo@...nel.org, linux-kernel@...r.kernel.org,
        wangnan0@...wei.com, kan.liang@...el.com, namhyung@...nel.org,
        hpa@...or.com, jolsa@...hat.com, tglx@...utronix.de
Subject: [tip:perf/core] perf tests: Set evlist of test__task_exit() to
 !overwrite

Commit-ID:  a0e3dd79cdd8ad838cbcefeff530a15193f8336e
Gitweb:     https://git.kernel.org/tip/a0e3dd79cdd8ad838cbcefeff530a15193f8336e
Author:     Wang Nan <wangnan0@...wei.com>
AuthorDate: Mon, 13 Nov 2017 01:38:07 +0000
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 16 Nov 2017 14:49:58 -0300

perf tests: Set evlist of test__task_exit() to !overwrite

Changing ringbuffer to !overwrite in this task is harmless because
this test uses a very low frequency (1) and using a very simple program
(true). There should have only 3 events in the whole test.  Overwriting
is impossible to happen.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Kan Liang <kan.liang@...el.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Link: http://lkml.kernel.org/r/20171113013809.212417-6-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/tests/task-exit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index bc4a734..98c0984 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -97,7 +97,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
 		goto out_delete_evlist;
 	}
 
-	if (perf_evlist__mmap(evlist, 128, true) < 0) {
+	if (perf_evlist__mmap(evlist, 128, false) < 0) {
 		pr_debug("failed to mmap events: %d (%s)\n", errno,
 			 str_error_r(errno, sbuf, sizeof(sbuf)));
 		goto out_delete_evlist;