linux-kernel - Re: PROBLEM: null pointer dereference in cfq_dispatch

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Message-ID: <4601789B.8040403@redhat.com>
Date:	Wed, 21 Mar 2007 14:25:31 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Dale Blount <linux-kernel@...e.us>
CC:	linux-kernel@...r.kernel.org, Neil Brown <neilb@...e.de>
Subject: Re: PROBLEM: null pointer dereference in cfq_dispatch_requests	(2.6.21-rc2
 and 2.6.20)

Dale Blount wrote:
> On Wed, 2007-03-21 at 14:09 -0400, Chuck Ebbert wrote:
>> Dale Blount wrote:
>>>> I'm puzzled why this is hitting Dan, but no one else has reported
>>>> anything. Dan, did 2.6.19 work for you?
>>> Actually, I believe it is happening to me too.  This is on a 4-disk raid5 with
>>> one failed disk on two 2-port sata_sil pci controller cards.
>>>
>>> The BUG below is from 2.6.20.3, but I will try 2.6.21-rc4 tonight.
>>> The disk didn't fail until 2.6.20, so I don't know if 2.6.19 would have worked
>>> or not.
>>>
>>>
>> Just to be clear: you have a RAID array (what level?) with a failed disk
>> and it's giving you the same error that Dan gets?
> 
> 
> Yes, the BUG looks to be pretty similar to me.  It's a 4 disk raid5 with
> one disk missing (dead and sent in for RMA).
> 

OK, I'm add NeilB to the cc:

(Dan has a RAID6 array with two failed disks.)


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