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

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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: Zheng Yan <zheng.z.yan@intel.com>
Signed-off-by: Peter 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: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Yan, Zheng 2012-06-15 14:31:32 +08:00 • committed by Ingo Molnar
commit e2d37cd213
1 changed files with 4 additions and 4 deletions
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8
kernel/events/core.c
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@ -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);