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From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Andrew Morton <akpm@osdl.org>
Subject: Re: 2.6.14-git3: scheduling while atomic from cpufreq on Athlon64
Date: Mon, 31 Oct 2005 20:45:32 +0100
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Cc: linux-kernel@vger.kernel.org, Ashok Raj <ashok.raj@intel.com>,
       Dave Jones <davej@codemonkey.org.uk>, Ingo Molnar <mingo@elte.hu>
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On Monday, 31 of October 2005 20:34, Andrew Morton wrote:
> "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
}-- snip --{
> > scheduling while atomic: swapper/0x00000001/1
> > 
> > Call Trace:<ffffffff8035014a>{schedule+122} <ffffffff802e2453>{cpufreq_frequency_table_target+371}
> >        <ffffffff8011d60c>{powernowk8_target+1916} <ffffffff802dfdb4>{__cpufreq_driver_target+116}
> >        <ffffffff801be269>{sysfs_new_dirent+41} <ffffffff802e097e>{cpufreq_governor_performance+62}
> >        <ffffffff802dec8d>{__cpufreq_governor+173} <ffffffff802df417>{__cpufreq_set_policy+551}
> >        <ffffffff802df5bf>{cpufreq_set_policy+79} <ffffffff802df946>{cpufreq_add_dev+806}
> >        <ffffffff802df540>{handle_update+0} <ffffffff802ae21a>{sysdev_driver_register+170}
> >        <ffffffff802df106>{cpufreq_register_driver+198} <ffffffff8010c122>{init+194}
> >        <ffffffff8010f556>{child_rip+8} <ffffffff8010c060>{init+0}
> >        <ffffffff8010f54e>{child_rip+0} 
> 
> Well I can't find it.  Ingo, didn't you have a debug patch which would help
> us identify where this atomic section started?

This is 100% reproducible on my box so I'll try to figure out what's up tomorrow
(unless someone else does it earlier ;-)).  Now I can only say it did not happen
with 2.6.14-rc5-mm1.

> > Additionally there are some problems with freezing processes by swsusp.

Once the box has not suspended due to a process refusing to freeze, but I was
unable to trace the problem at that time.  This does not seem to be readily
reproducible, however.

Greetings,
Rafael
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