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Date: Tue, 25 Jul 2006 17:06:07 +0200
From: Erik Mouw <erik@harddisk-recovery.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Chuck Ebbert <76306.1226@compuserve.com>,
       Arjan van de Ven <arjan@linux.intel.com>,
       Ashok Raj <ashok.raj@intel.com>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       Dave Jones <davej@redhat.com>, Andrew Morton <akpm@osdl.org>
Subject: Re: remove cpu hotplug bustification in cpufreq.
Message-ID: <20060725150606.GA8566@harddisk-recovery.com>
References: <200607242023_MC3-1-C5FE-CADB@compuserve.com> <Pine.LNX.4.64.0607241752290.29649@g5.osdl.org>
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On Mon, Jul 24, 2006 at 05:59:23PM -0700, Linus Torvalds wrote:
> On Mon, 24 Jul 2006, Chuck Ebbert wrote:
> > 
> > I thought just the 'ondemand' governor was a problem?
> 
> The ondemand governor seems to be singled out not because it has unique 
> problems, but because it seems to be used by Fedora Core for some strange 
> reason.
> 
> I would judge that any bugs in cpufreq_ondemand.c are likely equally 
> evident in cpufreq_conservative.c, for example. I think the two have the 
> same background, and seem to have the same broken locking.

The "conservative" governor switches less often, so the locking
condition just happens less often.

After some strange lockups with 2.6.18-rc* I switched from "ondemand"
to "conservative" and now my laptop survives the night. Sheer luck, I
guess. I'd rather switch to "powersave" or "performance".


Erik

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