Subject: Re: 2.6.9rc2-mm4 oops
From: Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>
To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org, mingo@elte.hu,
       Len Brown <len.brown@intel.com>, acpi-devel@lists.sourceforge.net,
       Bernhard Rosenkraenzer <bero@arklinux.org>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>
In-Reply-To: <200410071431.20400.bjorn.helgaas@hp.com>
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	 <1096653158.7485.17.camel@cmn37.stanford.edu>
	 <200410011633.10171.bjorn.helgaas@hp.com>
	 <200410071431.20400.bjorn.helgaas@hp.com>
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Date: 07 Oct 2004 14:09:46 -0700
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On Thu, 2004-10-07 at 13:31, Bjorn Helgaas wrote:
> On Friday 01 October 2004 4:33 pm, Bjorn Helgaas wrote:
> > On Friday 01 October 2004 11:52 am, Fernando Pablo Lopez-Lezcano wrote:
> > > On Fri, 2004-10-01 at 08:04, Bjorn Helgaas wrote:
> > > >  Also, can you look up the bad address
> > > > (e.g., f8881920) in /proc/kallsyms? 
> > > 
> > > This is what I find:
> > > f8880f80 ? __mod_vermagic5      [xor]
> > > f8880fcd ? __module_depends     [xor]
> > > f8881000 t acpi_button_init     [button]
> > > f8881000 t init_module  [button]
> > > f8884000 t xor_pII_mmx_2        [xor]
> > > f8884130 t xor_pII_mmx_3        [xor]
> > 
> > You are remembering that /proc/kallsyms isn't sorted, right?
> > 
> > If you still can't match the address to anything interesting,
> > can you see whether it's related to any of the other modules
> > (i.e., see whether it happens even if you don't load any of
> > the other ACPI drivers, or try leaving out any other drivers
> > you can get along without)?  Maybe try loading an ACPI driver
> > other than floppy, at the same point in the module load sequence,
> > to see if the problem is specific to floppy, or if floppy is
> > just an innocent bystander?
> > 
> > I looked at all the callers of acpi_bus_register_driver(), and
> > they all look fine (except the hpet one I found yesterday).  But
> > maybe there's something I missed, or maybe the acpi_bus_drivers
> > list got corrupted somehow.
> > 
> > If you don't load the floppy driver, is the system stable?

Even if I load it (unsuccesfully - there's actually no floppy) the
system _appears_ to be fine. If I remember correctly this happens in the
context of device discovery (kudzu). 

> Any update on all this?  I've tried to reproduce the problem on
> my Athlon box, but so far I've been unsuccessful.

Sorry for the delay, too busy as usual. 

BTW, what I sent was actually sorted. I'll see if I can get more
information later today (I have not forgotten). 

-- Fernando


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