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@xxxxxxxxxx> > 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@xxxxxxxxx> 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@xxxxxxxxx> Acked-by: Mike Galbraith <efault@xxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> Miklos -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
