On Fri, Aug 05, 2016 at 10:41:33AM -0700, Bart Van Assche wrote: > On 08/04/2016 07:09 AM, Peter Zijlstra wrote:
> >But I'd still like to understand where we loose the wakeup. > > My assumption is that __wake_up_common() and signal delivery happen > concurrently, that __wake_up_common() wakes up bit_wait_io() and that signal > delivery happens after bit_wait_io() has been woken up but before it tests > the signal pending state. That would be the exact scenario I drew a picture of, no? I'm still failing to see the hole there. Please draw a picture like that and illustrate the hole.
