On Thu, Jul 23, 2020 at 08:41:03PM +0100, Chris Wilson wrote: > I am very sorry for the wild goose chase.
*phew*... all good then. I was starting to go a little ga-ga trying to make sense of things. Arguably we should probably do something like: @@ -4555,7 +4572,7 @@ asmlinkage __visible void __sched preempt_schedule_irq(void) int default_wake_function(wait_queue_entry_t *curr, unsigned mode, int wake_flags, void *key) { - return try_to_wake_up(curr->private, mode, wake_flags); + return try_to_wake_up(curr->private, mode, wake_flags & WF_SYNC); } EXPORT_SYMBOL(default_wake_function); Since I don't think anybody uses anything other than WF_SYNC, ever. And the rest of the WF_flags are used internally. Thanks Chris!