diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2010-11-24 10:05:55 +0100 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2010-12-14 23:40:16 +0100 |
| commit | bb25ed06260128cf99a46950cc1b0b131e9c9477 (patch) | |
| tree | 988ea3188fb912a3a702dc9f2caa7cee2381f879 /include | |
| parent | c044cc9988cd29246c6d6781068c710817dd2f29 (diff) | |
perf: Fix inherit vs. context rotation bug
commit dddd3379a619a4cb8247bfd3c94ca9ae3797aa2e upstream.
It was found that sometimes children of tasks with inherited events had
one extra event. Eventually it turned out to be due to the list rotation
no being exclusive with the list iteration in the inheritance code.
Cure this by temporarily disabling the rotation while we inherit the events.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/perf_event.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 5d0266d94985..bfacc8e269b1 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -764,6 +764,7 @@ struct perf_event_context { int nr_active; int is_active; int nr_stat; + int rotate_disable; atomic_t refcount; struct task_struct *task; |