Messages in this thread Patch in this message | | | Date | Mon, 21 Mar 2011 16:10:09 -0700 | From | Greg KH <> | Subject | [29/44] perf: Handle stopped state with tracepoints |
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2.6.32-longterm review patch. If anyone has any objections, please let us know.
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From: Frederic Weisbecker <fweisbec@gmail.com>
commit a0f7d0f7fc02465bb9758501f611f63381792996 upstream.
We toggle the state from start and stop callbacks but actually don't check it when the event triggers. Do it so that these callbacks actually work.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1299529629-18280-2-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- kernel/perf_event.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -4167,6 +4167,8 @@ static void tp_perf_event_destroy(struct static const struct pmu *tp_perf_event_init(struct perf_event *event) { + if (event->hw.state & PERF_HES_STOPPED) + return 0; /* * Raw tracepoint data is a severe data leak, only allow root to * have these.
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