Commit-ID: f506b3dc0ec454a16d40cab9ee5d75435b39dc50
Gitweb: http://git.kernel.org/tip/f506b3dc0ec454a16d40cab9ee5d75435b39dc50
Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Thu, 26 May 2011 17:02:53 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Sat, 28 May 2011 17:04:59 +0200
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@xxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-2euus3f3x3dyvdk52cjxw8zu@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
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 c09767f..d863b3c 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;
}
--
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