On Fri, 30 Sep 2016, Steven Rostedt wrote:

This looks awfully complex. Would something as simple as this work?

What harm can happen by moving the holding of the lock after the
wakeups for RT?

That's exactly bringing us back to the state before we added the delayed
wakeup so that the woken waiter will not be blocked on hb->lock right
away. That's 2 extra context switches for nothing.

Thanks,

	tglx