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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-04-09 21:17:41 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-28 18:01:10 +0200 |
| commit | 9137fb28ac74d05eb66d1d8e6778eaa14e6fed43 (patch) | |
| tree | d27d1bd1c2fd89b50feafdb04ac868225b69a812 /kernel/events | |
| parent | perf: Optimize ctx_sched_out() (diff) | |
| download | linux-9137fb28ac74d05eb66d1d8e6778eaa14e6fed43.tar.xz linux-9137fb28ac74d05eb66d1d8e6778eaa14e6fed43.zip | |
perf: Clean up 'ctx' reference counting
Small cleanup to how we refcount in find_get_context(), this also
allows us to use put_ctx() to free things instead of using kfree().
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110409192141.719340481@chello.nl
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 4d9a1f014286..d665ac4242f2 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2835,16 +2835,12 @@ retry: unclone_ctx(ctx); ++ctx->pin_count; raw_spin_unlock_irqrestore(&ctx->lock, flags); - } - - if (!ctx) { + } else { ctx = alloc_perf_context(pmu, task); err = -ENOMEM; if (!ctx) goto errout; - get_ctx(ctx); - err = 0; mutex_lock(&task->perf_event_mutex); /* @@ -2856,14 +2852,14 @@ retry: else if (task->perf_event_ctxp[ctxn]) err = -EAGAIN; else { + get_ctx(ctx); ++ctx->pin_count; rcu_assign_pointer(task->perf_event_ctxp[ctxn], ctx); } mutex_unlock(&task->perf_event_mutex); if (unlikely(err)) { - put_task_struct(task); - kfree(ctx); + put_ctx(ctx); if (err == -EAGAIN) goto retry; |