On Tue, Jul 18, 2017 at 12:18:29PM -0700, Christoph Hellwig wrote: > On Tue, Jul 18, 2017 at 11:12:53AM -0700, Alexei Potashnik wrote: > > NUMA rework of workqueue made the combination of max_active of 1 and > > WQ_UNBOUND insufficient to guarantee ST behavior system wide. > > > > alloc_ordered_queue should now be used instead. > > Eww. And how many existing users might be broken by that?
Good point. create_singlethread_workqueue() maps to alloc_ordered_workqueue(), so they're all good. Only the ones which got converted to the new interface incorrectly would be broken. I probably should make WQ_UNBOUND / 1 behave as ordered. I'll think more about it. Thanks! -- tejun
