Hello, Jeff. On Tue, Nov 03, 2015 at 12:55:04PM -0500, Jeff Layton wrote: > > Ok, I built a kernel with that patch reverted and that seems to fix the > > problem. > > > > Looking at the patch, I guess the main difference is that we're no > > longer using add_timer for unbound workqueue tasks. That said, we > > should have possession of the PENDING bit before calling add_timer_on. > > > > So...I'm a little stumped. Any thoughts as to where the race could be? > > Ok, I've been able to reproduce this with a small module that I wrote > as a reproducer:
I think I know what's going on. Looks like a bug in timer code when timers are queued on a different cpu than before. Will experiment with it a bit and report back. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
