linux-kernel - Re: [PATCH] cpufreq: remove dbs

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Message-ID: <20090623193215.GA31374@elte.hu>
Date:	Tue, 23 Jun 2009 21:32:15 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	Thomas Renninger <trenn@...e.de>, Dave Jones <davej@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Yinghai Lu <yinghai@...nel.org>, Avi Kivity <avi@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"mark.langsdorf@....com" <mark.langsdorf@....com>
Subject: Re: [PATCH] cpufreq: remove dbs_mutex


* Pallipadi, Venkatesh <venkatesh.pallipadi@...el.com> wrote:

> >-----Original Message-----
> >From: Ingo Molnar [mailto:mingo@...e.hu] 
> >Sent: Tuesday, June 23, 2009 12:14 PM
> >To: Pallipadi, Venkatesh
> >Cc: Thomas Renninger; Dave Jones; Rusty Russell; Linus 
> >Torvalds; Yinghai Lu; Avi Kivity; Andrew Morton; Thomas 
> >Gleixner; H. Peter Anvin; linux-kernel@...r.kernel.org; 
> >cpufreq@...r.kernel.org; mark.langsdorf@....com
> >Subject: Re: [PATCH] cpufreq: remove dbs_mutex
> >
> >
> >* Pallipadi, Venkatesh <venkatesh.pallipadi@...el.com> wrote:
> >
> >> Mathieu Desnoyers sent a patch earlier that should address 
> >this problem.
> >> 
> >> http://lkml.indiana.edu/hypermail/linux/kernel/0906.1/00331.html
> >
> >No, that patch has _not_ fixed the regression:
> >
> >  http://lkml.org/lkml/2009/6/8/563
> >
> 
> The subsequent failure that Dave saw after that patch seemed to be 
> related to dbs_mutex
>
>    http://lkml.org/lkml/2009/6/11/6
> 
> That should be be fixed by your original patch.

And how well will the two mix? This should really be pursued by the 
cpufreq people i think ...

	Ingo
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