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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-05-26 17:02:53 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-28 17:04:59 +0200 |
| commit | f506b3dc0ec454a16d40cab9ee5d75435b39dc50 (patch) | |
| tree | fc0dfaab17f42445e04abf51817016647a9c6b56 /kernel | |
| parent | e4a338d05df93ab1ebf291aca1e753064319d301 (diff) | |
| download | lwn-f506b3dc0ec454a16d40cab9ee5d75435b39dc50.tar.gz lwn-f506b3dc0ec454a16d40cab9ee5d75435b39dc50.zip | |
perf: Fix SIGIO handling
Vince noticed that unless we mmap() a buffer, SIGIO gets lost. So
explicitly push the wakeup (including signals) when requested.
Reported-by: Vince Weaver <vweaver1@eecs.utk.edu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/n/tip-2euus3f3x3dyvdk52cjxw8zu@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index c09767f7db3e..d863b3c057bb 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -5028,6 +5028,14 @@ static int __perf_event_overflow(struct perf_event *event, int nmi, else perf_event_output(event, nmi, data, regs); + if (event->fasync && event->pending_kill) { + if (nmi) { + event->pending_wakeup = 1; + irq_work_queue(&event->pending); + } else + perf_event_wakeup(event); + } + return ret; } |