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X-Mailer: exmh version 2.6.3 04/04/2003 with nmh-1.0.4+dev
To: Douglas J Hunley <doug@hunley.homeip.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.0: Badness in pci_find_subsys!! 
In-Reply-To: Your message of "Thu, 24 Jul 2003 13:26:01 EDT."
             <200307241326.04656.doug@hunley.homeip.net> 
From: Valdis.Kletnieks@vt.edu
References: <200307241326.04656.doug@hunley.homeip.net>
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On Thu, 24 Jul 2003 13:26:01 EDT, Douglas J Hunley <doug@hunley.homeip.net>  said:

> Just had my athlon box lock-up solid. needed SysRq to reboot the thing.. 
> kernel info follows:
> Jul 24 13:08:23 doug kernel: Badness in pci_find_subsys at 
> drivers/pci/search.c:132
> Jul 24 13:08:23 doug kernel: Call Trace:
> Jul 24 13:08:23 doug kernel:  [<c02064a1>] pci_find_subsys+0x111/0x120
> Jul 24 13:08:23 doug kernel:  [<c02064df>] pci_find_device+0x2f/0x40
> Jul 24 13:08:23 doug kernel:  [<c0206368>] pci_find_slot+0x28/0x50
> Jul 24 13:08:23 doug kernel:  [<f8a2ada4>] os_pci_init_handle+0x3a/0x67 

The 'badness in pci_find_subsys' may not be related to your hang. 

The NVidia msgs are basically caused by the fact that pci_find_slot() is
getting called in an interrupt, so we trigger the WARN_ON in pci_find_subsys().
The worry here is that we may be walking the PCI list on the interrupt side
while something else is hotplugging a new device into existence, causing it to
walk off the end of a inconsistent list.  Unless you actually crapped out right
at 13:08:23, it's probably unrelated.

(I was getting the same NVidia traceback on a regular basis (3-4 at every start
of the X server, and 1 at X server shutdown) under 2.5.72-mm3, they stopped
when I went to 2.5.73-mm1.  If you're still seeing them in 2.6.0-test1, I would
suspect something different in the -mm series is fixing them for me - first place
to look is what got added between 72-mm3 and 73-mm1.

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