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Commit e2d37cd2 authored by Yan, Zheng's avatar Yan, Zheng Committed by Ingo Molnar
Browse files

perf: Allow the PMU driver to choose the CPU on which to install events 



Allow the pmu->event_init callback to change event->cpu, so the PMU driver
can choose the CPU on which to install events.

Signed-off-by: default avatarZheng Yan <zheng.z.yan@intel.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1339741902-8449-4-git-send-email-zheng.z.yan@intel.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent fbfc623f

kernel/events/core.c

+4 −4
Original line number Diff line number Diff line
@@ -6306,7 +6306,7 @@ SYSCALL_DEFINE5(perf_event_open, 
	/*

	 * Get the target context (task or percpu):

	 */

	ctx = find_get_context(pmu, task, cpu);

	ctx = find_get_context(pmu, task, event->cpu);

	if (IS_ERR(ctx)) {

		err = PTR_ERR(ctx);

		goto err_alloc;
@@ -6379,16 +6379,16 @@ SYSCALL_DEFINE5(perf_event_open, 
	mutex_lock(&ctx->mutex);



	if (move_group) {

		perf_install_in_context(ctx, group_leader, cpu);

		perf_install_in_context(ctx, group_leader, event->cpu);

		get_ctx(ctx);

		list_for_each_entry(sibling, &group_leader->sibling_list,

				    group_entry) {

			perf_install_in_context(ctx, sibling, cpu);

			perf_install_in_context(ctx, sibling, event->cpu);

			get_ctx(ctx);

		}

	}



	perf_install_in_context(ctx, event, cpu);

	perf_install_in_context(ctx, event, event->cpu);

	++ctx->generation;

	perf_unpin_context(ctx);

	mutex_unlock(&ctx->mutex);