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perf_event: x86: Optimize x86_pmu_disable()

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x86_pmu_disable() removes the event from the cpuc->event_list[], however
since an event can only be on that list once, stop looking after we found
it.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-01-25 11:57:25 +01:00 committed by Ingo Molnar
parent c933c1a603
commit 6c9687abeb
1 changed files with 1 additions and 0 deletions
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arch/x86/kernel/cpu/perf_event.c
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@ -1884,6 +1884,7 @@ static void x86_pmu_disable(struct perf_event *event)
cpuc->event_list[i-1] = cpuc->event_list[i]; cpuc->event_list[i-1] = cpuc->event_list[i];
--cpuc->n_events; --cpuc->n_events;
break;
} }
} }
perf_event_update_userpage(event); perf_event_update_userpage(event);