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SubjectRe: [PATCH RFC] reduce runqueue lock contention
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On Mon, 2010-06-21 at 12:54 +0200, Peter Zijlstra wrote:
> > It looses the ttwu task_running() check, as I must admit I'm not quite
> > sure what it does.. Ingo?

I think I figured out what its for, its for when p is prev in schedule()
after deactivate_task(), we have to call activate_task() it again, but
we cannot migrate the task because the CPU its on is still referencing
it.

I added it back, but still fireworks :-)


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