Re: [PATCH 2/2 v2] sched/wait: Introduce lock breaker in wake_up_page_bit

[Linus Torvalds]

On Sun, Aug 27, 2017 at 2:40 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> End result: page is unlocked, CPU3 is waiting, nothing will wake CPU3 up.

Not CPU3. CPU3 was the waker. It's thread 2 that is waiting and never
got woken up, of course.

Other than that, the scenario still looks real to me.

Ideas?

                 Linus