Re: ide_wait_not_busy oops still with 2.6.14-rc3 (Re: 1GHz pbook15", linux 2.6.14-rc2 oops on resume)

[Lee Revell]

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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