Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-28 23:21:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

perf: De-schedule a task context when removing the last event

Browse Source 
Since perf_install_in_context() will now install a context when we
add the first event, we can de-schedule the context when the last
event is removed.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110409192142.090431763@chello.nl
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-04-09 21:17:48 +02:00 committed by Ingo Molnar
parent e03a9a55b4
commit 64ce312618
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
kernel/events/core.c
View File

@ -1120,6 +1120,10 @@ static int __perf_remove_from_context(void *info)
raw_spin_lock(&ctx->lock);
event_sched_out(event, cpuctx, ctx);
list_del_event(event, ctx);
if (!ctx->nr_events && cpuctx->task_ctx == ctx) {
ctx->is_active = 0;
cpuctx->task_ctx = NULL;
}
raw_spin_unlock(&ctx->lock);
return 0;