Re: [PATCH] locking/mutex: Reduce chance of setting HANDOFF bit on unlocked mutex

[Waiman Long]

On 6/30/21 9:56 AM, Peter Zijlstra wrote:
> On Wed, Jun 30, 2021 at 09:50:11AM -0400, Waiman Long wrote:
>
> > The code looks good to me. It is an even better approach to make sure that
> > the HANDOFF will never be set on an unlocked mutex.
> >
> > Reviewed-by: Waiman Long <longman@xxxxxxxxxx>
> Thanks, what about that XXX? Should we not check sigpending before doing
> the optimistic spinning thing?
Sorry, I missed the XXX comment:-)

This is a generic problem as other waiters that go into the spinning 
loop also don't check for sigpending. On the other hand, I am fine with 
doing the pending signal check before doing the optimistic spinning.

Cheers,
Longman