[PATCH 1/4] locking/ww_mutex: Fix a deadlock affecting ww_mutexes

[Peter Zijlstra]

On Wed, Nov 23, 2016 at 03:25:25PM +0100, Daniel Vetter wrote:

> Without thinking it through in detail this is a PI issue, except that we
> replace boosting with wakeup&back-off. Could we perhaps steal something
> from rt mutexes to make it fair&efficient?

rt_mutexes order the waiters by 'priority' and wake the top most.