diff options
author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-05-26 11:02:53 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2011-05-28 11:04:59 -0400 |
commit | f506b3dc0ec454a16d40cab9ee5d75435b39dc50 (patch) | |
tree | fc0dfaab17f42445e04abf51817016647a9c6b56 | |
parent | e4a338d05df93ab1ebf291aca1e753064319d301 (diff) |
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>
-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, | |||
5028 | else | 5028 | else |
5029 | perf_event_output(event, nmi, data, regs); | 5029 | perf_event_output(event, nmi, data, regs); |
5030 | 5030 | ||
5031 | if (event->fasync && event->pending_kill) { | ||
5032 | if (nmi) { | ||
5033 | event->pending_wakeup = 1; | ||
5034 | irq_work_queue(&event->pending); | ||
5035 | } else | ||
5036 | perf_event_wakeup(event); | ||
5037 | } | ||
5038 | |||
5031 | return ret; | 5039 | return ret; |
5032 | } | 5040 | } |
5033 | 5041 | ||