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Subject: Re: volanoMark regression with kernel 2.6.26-rc1
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
       LKML <linux-kernel@vger.kernel.org>,
       Dhaval Giani <dhaval@linux.vnet.ibm.com>,
       Srivatsa Vaddagiri <vatsa@in.ibm.com>
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	 <20080507091748.GB30645@elte.hu>
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Date: Wed, 07 May 2008 19:34:17 +0200
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On Wed, 2008-05-07 at 11:17 +0200, Ingo Molnar wrote:
> * Zhang, Yanmin <yanmin_zhang@linux.intel.com> wrote:
> 
> > Comparing with 2.6.25, volanoMark has big regression with kernel 
> > 2.6.26-rc1. It's about 50% on my 8-core stoakley, 16-core tigerton, 
> > and Itanium Montecito.
> > 
> > With bisect, I located below patch.
> 
> thanks Yanmin, i've queued up your patch that reverts this change.

Is this really needed now that GROUP_SCHED defaults to 'n' ?

Yanmin, this is with GROUP_SCHED=y, right or is this without?