[tip:perf/core] perf_events: Update the context time on exit

tip-bot for Peter Zijlstra
2009-11-23T11:55:14Z

Commit-ID: 5e942bb33371254a474653123cd9e13a4c89ee44
Gitweb: http://git.kernel.org/tip/5e942bb33371254a474653123cd9e13a4c89ee44
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Mon, 23 Nov 2009 11:37:26 +0100
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 23 Nov 2009 11:49:56 +0100

perf_events: Update the context time on exit

It appeared we did call update_event_times() on exit, but we
failed to update the context time, which renders the former
moot.

Locking is a bit iffy, we call update_event_times under
ctx->mutex instead of ctx->lock - the next patch fixes this.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091123103819.764207355@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/perf_event.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index fb851ec..8be2574 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -4983,6 +4983,7 @@ void perf_event_exit_task(struct task_struct *child)
* the events from it.
*/
unclone_ctx(child_ctx);
+ update_context_time(child_ctx);
spin_unlock_irqrestore(&child_ctx->lock, flags);

/*