Re: [PATCH -rfc 4/4] locking/rtmutex: Support spin on owner (osq)

Peter Zijlstra
2015-06-09T11:21:55Z

On Tue, Jun 09, 2015 at 11:29:59AM +0200, Thomas Gleixner wrote:
>
> If you look at the RT code, then you'll notice that in the slow lock
> path we queue the incoming waiter (including the PI dance) and then
> spin only if the waiter is the top waiter on the lock.

On a related note; does the RT code still add lock stealing to rtmutex?

We allow higher prio lock stealing, but I seem to remember a longish
debate if we should allow equal prio lock stealing.