3.0-stable review patch. If anyone has any objections, please let us know.
------------------
From: Peter Zijlstra <a.p.zijls...@chello.nl>
The below patch is for -stable only, upstream has a much larger patch
that contains the below hunk in commit a8b0ca17b80e92faab46ee7179ba9e99ccb61233
Vince found that under certain circumstances software event overflows
go wrong and deadlock. Avoid trying to delete a timer from the timer
callback.
Reported-by: Vince Weaver <vweav...@eecs.utk.edu>
Signed-off-by: Peter Zijlstra <a.p.zijls...@chello.nl>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
kernel/events/core.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5016,11 +5016,8 @@ static int __perf_event_overflow(struct
if (events && atomic_dec_and_test(&event->event_limit)) {
ret = 1;
event->pending_kill = POLL_HUP;
- if (nmi) {
- event->pending_disable = 1;
- irq_work_queue(&event->pending);
- } else
- perf_event_disable(event);
+ event->pending_disable = 1;
+ irq_work_queue(&event->pending);
}
if (event->overflow_handler)
_______________________________________________
stable mailing list
stable@linux.kernel.org
http://linux.kernel.org/mailman/listinfo/stable
