On Fri, 7 Aug 2015, Peter Zijlstra wrote: > On Fri, Aug 07, 2015 at 12:57:38PM +0200, Peter Zijlstra wrote: > > > > >+void __finish_swait(struct swait_queue_head *q, struct swait_queue *wait) > > > > this one has no users the __ suggests that it is locked edition. Maybe > > > it is for the completions… > > > > Yeah, who knows, I certainly do not anymore ;-) > > On that, we cannot convert completions to swait. Because swait wake_all > must not happen from IRQ context, and complete_all() typically is used > from just that. Well, completions are not the ones which have a gazillion of waiters and we got quite some performance back from using swait in completions on RT. Thanks, tglx
