Re: [RFC][PATCH 4/4] sched/fair: Optimize cgroup pick_next_task_fair

[Peter Zijlstra]

On Thu, 2012-06-14 at 23:19 +0200, Peter Zijlstra wrote:
> On Thu, 2012-06-14 at 15:29 +0200, Peter Zijlstra wrote:
> > Since commit 2f36825b1 ("sched: Next buddy hint on sleep and preempt
> > path") it is likely we pick a new task from the same cgroup, doing a put
> > and then set on all intermediate entities is a waste of time, so try to
> > avoid this. 
> 
> I just noticed put_prev_entity() also does the bandwidth enforcement
> stuff, I think I just broke that. Will have a peek at fixing that
> tomorrow or so.

Damn, that's annoying, that wants to be done bottom-up, while we're now
doing a top-down selection. pjt any sane ideas?
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