Commit f506b3dc authored May 26, 2011 by Peter Zijlstra Committed by Ingo Molnar May 28, 2011

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>

parent e4a338d0

kernel/events/core.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}