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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-11-23 11:37:25 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-23 11:49:56 +0100
commit2e2af50b1fab3c40636839a7f439c167ae559533 (patch)
tree227e0bfd12757fb90d403440f318e7337144c468 /kernel
parent6c2bfcbe58e0dd39554be88940149f5aa11e17d1 (diff)
downloadlinux-2e2af50b1fab3c40636839a7f439c167ae559533.tar.bz2
perf_events: Disable events when we detach them
If we leave the event in STATE_INACTIVE, any read of the event after the detach will increase the running count but not the enabled count and cause funny scaling artefacts. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091123103819.689055515@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/perf_event.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 1f14481c2337..fb851ec34461 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -294,6 +294,8 @@ list_del_event(struct perf_event *event, struct perf_event_context *ctx)
if (event->group_leader != event)
event->group_leader->nr_siblings--;
+ event->state = PERF_EVENT_STATE_OFF;
+
/*
* If this was a group event with sibling events then
* upgrade the siblings to singleton events by adding them