linux-kernel - [tip:perf/core] perf evlist: Reset SIGTERM handler in workload child process

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Date:	Fri, 31 May 2013 05:28:05 -0700
From:	tip-bot for David Ahern <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	mingo@...nel.org, dsahern@...il.com, tglx@...utronix.de,
	jolsa@...hat.com
Subject: [tip:perf/core] perf evlist:
  Reset SIGTERM handler in workload child process

Commit-ID:  0817df08d31cd961be225e601d8ec92acac62027
Gitweb:     http://git.kernel.org/tip/0817df08d31cd961be225e601d8ec92acac62027
Author:     David Ahern <dsahern@...il.com>
AuthorDate: Sat, 25 May 2013 17:50:39 -0600
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 30 May 2013 14:34:56 +0300

perf evlist: Reset SIGTERM handler in workload child process

Jiri reported hanging perf tests on latest acme's perf/core and bisected
it to 87f303a9f:

[jolsa@...va2 perf]$ cat /proc/sys/kernel/perf_event_paranoid
1
[jolsa@...va2 perf]$ ./perf record -C 0 kill
Error:
You may not have permission to collect %sstats.
Consider tweaking /proc/sys/kernel/perf_event_paranoid:
 -1 - Not paranoid at all
  0 - Disallow raw tracepoint access for unpriv
  1 - Disallow cpu events for unpriv
  2 - Disallow kernel profiling for unpriv

Need to let default handling kickin for workload process.

Reported-by: Jiri Olsa <jolsa@...hat.com>
Signed-off-by: David Ahern <dsahern@...il.com>
Acked-by: Jiri Olsa <jolsa@...hat.com>
Tested-by: Jiri Olsa <jolsa@...hat.com>
Link: http://lkml.kernel.org/r/1369525839-1261-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 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 f7c7278..99b43dd 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -776,6 +776,8 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
 		if (pipe_output)
 			dup2(2, 1);
 
+		signal(SIGTERM, SIG_DFL);
+
 		close(child_ready_pipe[0]);
 		close(go_pipe[1]);
 		fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
--
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