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

[tip-bot for Peter Zijlstra]

Commit-ID:  5e942bb33371254a474653123cd9e13a4c89ee44
Gitweb:     http://git.kernel.org/tip/5e942bb33371254a474653123cd9e13a4c89ee44
Author:     Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Mon, 23 Nov 2009 11:37:26 +0100
Committer:  Ingo Molnar <mingo@xxxxxxx>
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@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
LKML-Reference: <20091123103819.764207355@xxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 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);
 
 	/*
--
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