diff options
| author | Jiri Olsa <[email protected]> | 2014-09-12 13:18:28 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2014-09-24 14:48:13 +0200 |
| commit | 802c8a61d4c9c794db863dcabb0006ab001a651b (patch) | |
| tree | 9cc29310d921d14eff91fbf86c652f28a5a37372 | |
| parent | 1929def9e609d1a8cdb1626d85eda3da66921a7d (diff) | |
Revert "perf: Do not allow optimized switch for non-cloned events"
This reverts commit 1f9a7268c67f0290837aada443d28fd953ddca90.
With the fix of the initial state for the cloned event we now correctly
handle the error described in:
1f9a7268c67f perf: Do not allow optimized switch for non-cloned events
so we can revert it.
I made an automated test for this, but its not suitable for automated
perf tests framework. It needs to be customized for each machine (the
more cpu the higher numbers for GROUPS/WORKERS/BYTES) and it could take
longer time to hit the issue.
Signed-off-by: Jiri Olsa <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | kernel/events/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 132524c8b340..b164cb07b30d 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2375,7 +2375,7 @@ static void perf_event_context_sched_out(struct task_struct *task, int ctxn, next_parent = rcu_dereference(next_ctx->parent_ctx); /* If neither context have a parent context; they cannot be clones. */ - if (!parent || !next_parent) + if (!parent && !next_parent) goto unlock; if (next_parent == ctx || next_ctx == parent || next_parent == parent) { |