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perf evlist: Reset SIGTERM handler in workload child process

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

[jolsa@krava2 perf]$ cat /proc/sys/kernel/perf_event_paranoid
1
[jolsa@krava2 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@redhat.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1369525839-1261-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2013-05-25 17:50:39 -06:00 committed by Arnaldo Carvalho de Melo
parent fd851780e6
commit 0817df08d3
1 changed files with 2 additions and 0 deletions
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2
tools/perf/util/evlist.c
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@ -776,6 +776,8 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
if (pipe_output) if (pipe_output)
dup2(2, 1); dup2(2, 1);
signal(SIGTERM, SIG_DFL);
close(child_ready_pipe[0]); close(child_ready_pipe[0]);
close(go_pipe[1]); close(go_pipe[1]);
fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);