On Fri 23-10-15 00:37:03, Tejun Heo wrote: > On Thu, Oct 22, 2015 at 05:35:59PM +0200, Michal Hocko wrote: > > But that shouldn't happen because the allocation path does cond_resched > > even when nothing is really reclaimable (e.g. wait_iff_congested from > > __alloc_pages_slowpath). > > cond_resched() isn't enough. The work item should go !RUNNING, not > just yielding. I am confused. What makes rescuer to not run? Nothing seems to be hogging CPUs, we are just out of workers which are loopin in the allocator but that is preemptible context. -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>