linux-kernel - Re: 2.6.24-git4+ regression

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Date:	Mon, 18 Feb 2008 05:28:31 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Lukas Hejtmanek <xhejtman@....muni.cz>
Cc:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>, mingo@...hat.com,
	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	dhaval@...ux.vnet.ibm.com, aneesh.kumar@...ibm.com, efault@....de
Subject: Re: 2.6.24-git4+ regression


* Lukas Hejtmanek <xhejtman@....muni.cz> wrote:

> On Thu, Feb 14, 2008 at 10:25:51PM +0530, Srivatsa Vaddagiri wrote:
> > The patch is against 2.6.25-rc1. I would request you to check for
> > difference it makes with CONFIG_FAIR_GROUP_SCHED and
> > CONFIG_FAIR_USER_SCHED turned on.
> 
> well, I tried the patch against 2.6.25-rc2-git1. It seems to be better 
> but without CONFIG_FAIR_GROUP_SCHED it is still even better.

could you try latest sched-devel.git, does it behave any better? It 
includes patches from Peter Zijlstra that should also address latencies 
under the group scheduler:

  http://people.redhat.com/mingo/sched-devel.git/README

	Ingo
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