Messages in this thread | | | Date | Thu, 22 Oct 2015 17:49:22 +0200 | From | Michal Hocko <> | Subject | Re: [PATCH] mm,vmscan: Use accurate values for zone_reclaimable() checks |
| |
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
| |