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Commit 96398826 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

perf: Ignore non-sampling overflows 



Some arch implementations call perf_event_overflow() by 'accident',
ignore this.

Reported-by: default avatarFrancis Moreau <francis.moro@gmail.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 5d508e82

kernel/perf_event.c

+7 −0
Original line number Original line Diff line number Diff line
@@ -4240,6 +4240,13 @@ static int __perf_event_overflow(struct perf_event *event, int nmi, 
	struct hw_perf_event *hwc = &event->hw;

	struct hw_perf_event *hwc = &event->hw;

	int ret = 0;

	int ret = 0;





	/*

	 * Non-sampling counters might still use the PMI to fold short

	 * hardware counters, ignore those.

	 */

	if (unlikely(!is_sampling_event(event)))

		return 0;



	if (!throttle) {

	if (!throttle) {

		hwc->interrupts++;

		hwc->interrupts++;

	} else {

	} else {