linux-kernel - Re: volanoMark regression with kernel 2.6.26-rc1

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Message-Id: <1210181657.6525.7.camel@lappy.programming.kicks-ass.net>
Date:	Wed, 07 May 2008 19:34:17 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>
Subject: Re: volanoMark regression with kernel 2.6.26-rc1

On Wed, 2008-05-07 at 11:17 +0200, Ingo Molnar wrote:
> * Zhang, Yanmin <yanmin_zhang@...ux.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?

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