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Subject: RE: in 2.6.23-rc3-git7 in do_cciss_intr
From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: "Miller, Mike (OS Dev)" <Mike.Miller@hp.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>,
       lkml <linux-kernel@vger.kernel.org>, scsi <linux-scsi@vger.kernel.org>,
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Date: Fri, 22 Aug 2008 10:54:46 -0500
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On Fri, 2008-08-22 at 15:48 +0000, Miller, Mike (OS Dev) wrote:
> 
> > -----Original Message-----
> > From: Randy Dunlap [mailto:randy.dunlap@oracle.com]
> > Sent: Thursday, August 21, 2008 7:27 PM
> > To: Miller, Mike (OS Dev)
> > Cc: lkml; scsi; akpm
> > Subject: Re: in 2.6.23-rc3-git7 in do_cciss_intr
> >
> > On Thu, 21 Aug 2008 16:25:24 +0000 Miller, Mike (OS Dev) wrote:
> >
> > > > >
> > > > > Randy,
> > > > > We know of a race condition in cciss_init_one. It's fixed
> > > > in 2.6.26 I believe. Here's the patch:
> > > > >
> > > > >
> > > >
> > http://groups.google.com/group/linux.kernel/browse_thread/thread/7b3
> > > > 9f
> > > > >
> > 2b77622ab03/4f5f45c008655ca1?hl=en&lnk=gst&q=cciss#4f5f45c008655ca
> > > > > 1
> > > >
> > > >
> > > > Mike,
> > > > Sorry, but my fingers have typoed the $subject.  My bad.
> > > > Kernel is 2.6.27-rc3-git7 (from above):
> > > >
> > > > > > > > Modules linked in: cciss(+) ehci_hcd ohci_hcd uhci_hcd
> > > > > > > > Pid: 0, comm: swapper Not tainted 2.6.27-rc3-git7 #1
> > > > > > > > RIP: 0010:[<ffffffffa001bb68>]  [<ffffffffa001bb68>]
> > > > > > > > do_cciss_intr+0x627/0xa6c [cciss]
> > > >
> > > Hmmmmm, let me know what happens from your retest. I'll
> > look at this
> > > as soon as I finish what I'm doing now. We trying to spin
> > for our test
> > > teams but I have something hopelessly broken. :(
> >
> > It didn't BUG in the retest.  That just means that it's more
> > difficult to find/fix, right?
> 
> Yup.

Randy,

If you can't reproduce it, could you use the debug information or gdb to
tell us what line in the source code this:

do_cciss_intr+0x627

corresponds to?  That might help isolating the problem.

Thanks,

James


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