Commit f506b3dc authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar

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: default avatarVince Weaver <vweaver1@eecs.utk.edu>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/n/tip-2euus3f3x3dyvdk52cjxw8zu@git.kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent e4a338d0
...@@ -5028,6 +5028,14 @@ static int __perf_event_overflow(struct perf_event *event, int nmi, ...@@ -5028,6 +5028,14 @@ static int __perf_event_overflow(struct perf_event *event, int nmi,
else else
perf_event_output(event, nmi, data, regs); 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; return ret;
} }
......
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