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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-04-09 21:17:48 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-28 18:01:23 +0200 |
| commit | 64ce312618ef0e11d88def80effcefd1b59fdb1e (patch) | |
| tree | 884c247a013b8d13fa7a1f90dfa5bc01e16d62d6 /kernel/events | |
| parent | e03a9a55b4e45377af9ca3d464135f9ea280b8f8 (diff) | |
| download | linux-64ce312618ef0e11d88def80effcefd1b59fdb1e.tar.gz linux-64ce312618ef0e11d88def80effcefd1b59fdb1e.tar.bz2 linux-64ce312618ef0e11d88def80effcefd1b59fdb1e.zip | |
perf: De-schedule a task context when removing the last event
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>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index c378062da277..cc5d57d1d0b6 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -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; |