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Commit 72523d80 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
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Revert "powerpc/perf: Use pmc_overflow() to detect rolled back events" 

This reverts commit 81331211.

This revert was requested by the author of the patch as it seems
to cause system hangs with some low frequency events
parent 18673533

arch/powerpc/perf/core-book3s.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -1463,7 +1463,7 @@ static void perf_event_interrupt(struct pt_regs *regs) 
		if (!event->hw.idx || is_limited_pmc(event->hw.idx))

		if (!event->hw.idx || is_limited_pmc(event->hw.idx))

			continue;

			continue;

		val = read_pmc(event->hw.idx);

		val = read_pmc(event->hw.idx);

		if (pmc_overflow(val)) {

		if ((int)val < 0) {

			/* event has overflowed */

			/* event has overflowed */

			found = 1;

			found = 1;

			record_and_restart(event, val, regs);

			record_and_restart(event, val, regs);