On Tue, 10 Jun 2014 19:41:39 +0200 (CEST)
Thomas Gleixner <[email protected]> wrote:
> > On the loop back around, have something like:
> >
> > if (top_waiter) {
> > if (!task_has_pi_waiters(task))
> > goto out_unlock_pi;
>
> The task has at least one pi waiter.
>
> > if (!requeue &&
> > top_waiter != task_top_pi_waiter(task)) {
> > if (!detect_deadlock)
> > goto out_unlock_pi;
> > else
> > requeue = false;
> > }
>
> Errm? if requeue is off we are in deadlock detection chainwalk
> mode. So all we care about is whether task is blocked on
> next_lock or not.
Actually that was a typo on my part. That should have been:
if (requeue &&
...
As we don't need to read the task_top_pi_waiter() again.
-- Steve
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