Subject: Re: ide_wait_not_busy oops still with 2.6.14-rc3 (Re: 1GHz pbook
	15", linux 2.6.14-rc2 oops on resume)
From: Lee Revell <rlrevell@joe-job.com>
To: Soeren Sonnenburg <kernel@nn7.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       linux-kernel@vger.kernel.org
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	 <pan.2005.10.06.19.19.22.673915@nn7.de>  <1128720351.17365.48.camel@gaston>
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Date: Wed, 12 Oct 2005 14:17:29 -0400
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On Mon, 2005-10-10 at 14:41 +0200, Soeren Sonnenburg wrote:
> On Sat, 2005-10-08 at 07:25 +1000, Benjamin Herrenschmidt wrote:
> > On Thu, 2005-10-06 at 21:19 +0200, Soeren Sonnenburg wrote:
> > > On Mon, 03 Oct 2005 07:12:24 +0000, Soeren Sonnenburg wrote:
> > > 
> > > > Hi all,
> > > > 
> > > > when a dvd featuring some iso content is in the dvd-drive and the
> > > > machine is put to sleep mode, it will give the following oops on resume.
> > > > It is working without problems if no media is in the drive.
> > > > Voluntary preemption is ON.
> > > > Find below the dmesg output when a dvd is in the drive.
> > > 
> > > now it is:
> [incomplet oops]
> 
> ok, here is the complete one:
> 
> BUG: soft lockup detected on CPU#0!

This isn't an Oops.  What the soft lockup detector is telling you is
that one CPU detected that another CPU was running something in the
kernel for a LONG time without rescheduling which is considered a bug.
The fix is to make ide_wait_not_busy() preemptible.

Lee

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