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Date: Tue, 16 Dec 2008 01:49:41 +0100 From: Miklos Szeredi <miklos@...redi.hu> To: rjw@...k.pl CC: a.p.zijlstra@...llo.nl, efault@....de, mingo@...e.hu, linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org, miklos@...redi.hu Subject: Re: [Bug #12208] uml is very slow on 2.6.28 host On Sat, 13 Dec 2008, Rafael J. Wysocki wrote: > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12208 > Subject : uml is very slow on 2.6.28 host > Submitter : Miklos Szeredi <miklos@...redi.hu> > Date : 2008-12-12 9:35 (2 days old) > References : http://marc.info/?l=linux-kernel&m=122907463518593&w=4 I did a bisection, and this is the commit which is responsible: commit 464b75273f64be7c81fee975bd6ca9593df3427b Author: Peter Zijlstra <a.p.zijlstra@...llo.nl> Date: Fri Oct 24 11:06:15 2008 +0200 sched: re-instate vruntime based wakeup preemption The advantage is that vruntime based wakeup preemption has a better conceptual model. Here wakeup_gran = 0 means: preempt when 'fair'. Therefore wakeup_gran is the granularity of unfairness we allow in order to make progress. Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl> Acked-by: Mike Galbraith <efault@....de> Signed-off-by: Ingo Molnar <mingo@...e.hu> Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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