Re: [PATCH 0/2] fix the itimer regression (BZ 12618)

[Ingo Molnar]

* Zhang, Yanmin <yanmin_zhang@xxxxxxxxxxxxxxx> wrote:

> On Thu, 2009-02-05 at 13:06 +0100, Ingo Molnar wrote:
> > * Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:
> > 
> > > This should hopefully address all the itimer borkage.
> > 
> > Applied to tip:timers/urgent, thanks Peter!
> > 
> > Yanmin: could you check hacbench_pth with latest tip/master, do
> > these fixes resolve that 3% regression you reported?
>
> Lin Ming tested it and hackbench_pth/volanoMark regression all disappear. 
> But oltp has a regression. We think oltp new regression isn't related to 
> the patch. Ming is investigating it.

Potential suspects for oltp regression would be:

 3d39870: sched_rt: don't use first_cpu on cpumask created with cpumask_and
 a571bbe: sched: fix buddie group latency
 a9f3e2b: sched: clear buddies more aggressively
 1596e29: sched: symmetric sync vs avg_overlap
 d942fb6: sched: fix sync wakeups

	Ingo
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