Commit 64ce3126 authored Apr 09, 2011 by Peter Zijlstra Committed by Ingo Molnar May 28, 2011

perf: De-schedule a task context when removing the last event



Since perf_install_in_context() will now install a context when we
add the first event, we can de-schedule the context when the last
event is removed.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110409192142.090431763@chello.nl


Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent e03a9a55

kernel/events/core.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1120,6 +1120,10 @@ static int __perf_remove_from_context(void *info)
		raw_spin_lock(&ctx->lock);
		event_sched_out(event, cpuctx, ctx);
		list_del_event(event, ctx);
		if (!ctx->nr_events && cpuctx->task_ctx == ctx) {
		ctx->is_active = 0;
		cpuctx->task_ctx = NULL;
		}
		raw_spin_unlock(&ctx->lock);

		return 0;