Re: 'autogroup' sched code KILLING responsiveness

From: Mike Galbraith
Date: Sun Jan 23 2011 - 00:42:33 EST


On Sat, 2011-01-22 at 21:32 -0600, Michael Witten wrote:
> On Sat, Jan 22, 2011 at 15:23, Michael Witten <mfwitten@xxxxxxxxx> wrote:
> > Of course, I have none of these problems when I disable:
> >
> > CONFIG_AUTOGROUP_SCHED
>
> Of course, if CONFIG_AUTOGROUP_SCHED is enabled, then the problem also
> goes away if the kernel is booted using the `noautogroup' parameter.

I built a UP kernel for my old P4 box, and fair group scheduling doesn't
appear to be working at all, whereas SMP does. It was usable, but
pretty horrible.

I have other (hot) things to do atm, but will investigate this. Thanks.

-Mike

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