Messages in this thread | | | From | Gene Heskett <> | Subject | Re: [patch] CFS (Completely Fair Scheduler), v2 | Date | Tue, 17 Apr 2007 13:15:39 -0400 |
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On Tuesday 17 April 2007, Ingo Molnar wrote: >* Ingo Molnar <mingo@elte.hu> wrote: >> ok - fortunately the delta between -v2-rc0 and -v2-final is pretty >> small. One difference is the child-runs-first fix. To restore the >> parent-runs-first logic, do this: >> >> echo 0 > /proc/sys/kernel/sched_child_runs_first >> >> does this make any difference? > >ok, i've got something better to test: i separated the delta out into a >more finegrained stack of 3 patches. You can pick them up from: > > http://redhat.com/~mingo/cfs-scheduler/older/sched-cfs-v2-rc0.patch > http://redhat.com/~mingo/cfs-scheduler/older/sched-cfs-v2-rc0-preempt-fix.p >atch > http://redhat.com/~mingo/cfs-scheduler/older/sched-cfs-v2-rc0-child-runs-fi >rst.patch > http://redhat.com/~mingo/cfs-scheduler/older/sched-cfs-v2-rc0-misc.patch > Ahh, so many cats, and so few recipes here Ingo. In this case cats=patches & recipes=time to test adequately. I do have another box, but it would probably take a week & about a big buck to get that old rh7.3 brought up to date & suitable, and its only a 500MHZ K-III, which might make the diffs more obvious. It would need a video card to replace its dinosaur Diamond and a fresh dvd drive. And its motherboard has very buggy usb chips. TYAN S-1590. Never could get anything bigger than a mouse packet through them.
>i test-built and test-booted all 4 steps of this. The baseline -v2-rc0 >patch should be the one that works - you might want to double-check it, >just to be sure. One of the other 3 patches ontop of this baseline >causes the regression on your desktop. My current bet is on preempt-fix, >so i have put that one first. The other one would be the second patch, >child-runs-first. The misc patch should have no effect on behavior - but >i've included it for completeness. (and i was wrong about the 'nice >fix', it is not in this delta) > > Ingo
-- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Q: What's the difference between a dead dog in the road and a dead lawyer in the road? A: There are skid marks in front of the dog. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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