linux-kernel - Re: 'autogroup' sched code KILLING responsiveness

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Date:	Sun, 23 Jan 2011 06:42:14 +0100
From:	Mike Galbraith <efault@....de>
To:	Michael Witten <mfwitten@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 'autogroup' sched code KILLING responsiveness

On Sat, 2011-01-22 at 21:32 -0600, Michael Witten wrote:
> On Sat, Jan 22, 2011 at 15:23, Michael Witten <mfwitten@...il.com> 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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