Ext3 users - Jul 2007 - Kernel panic in ext3:dx_probe, help needed

This may or may not be ext3 related but I am trying to find any pointers
which might help me. I got a number of HP Proliant DL380 g5 with a P400
controller and also two qla2400 cards. The OS is RedHat EL4 U5 x86_64.
 
Every time during reboot these systems panic after the last umount and I
believe before the cciss driver is getting unloaded. The last messages I
am able to see are:

md: stopping all md devices.
md: md0 switched to read-only mode.

After this I get the panic, on other systems I believe the following
messages come (DL380 g4 with 6i controller):

cciss: stopping all cciss devices.
cciss: removing controller 0

The last 3 lines of the panic are:

Code: 0f 0b 5d 93 12 a0 ff ff ff ff 7d 01 0f b7 5d 02 85 db 74 08
RIP <ffffffffa011d0f4>{:ext3:dx_probe+427} RSP <00000102259338e8>
 <0>Kernel panic - not syncing: Oops

I can not reproduce this problem with a DL380 g4 with 6i controller.
Tried
the included cciss driver in EL4 Update 5 and the one provided by HP. No
difference.

Any tips what to look at would be appreciated.

Regards, Ulf.

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> -----Original Message-----
> From: ext3-users-bounces at redhat.com
[mailto:ext3-users-bounces at redhat.com]
> On Behalf Of Ulf Zimmermann
> Sent: Saturday, July 14, 2007 02:45
> To: ext3-users at redhat.com
> Subject: Kernel panic in ext3:dx_probe, help needed
> 
> This may or may not be ext3 related but I am trying to find any
pointers
> which might help me. I got a number of HP Proliant DL380 g5 with a
P400
> controller and also two qla2400 cards. The OS is RedHat EL4 U5 x86_64.
> 
> Every time during reboot these systems panic after the last umount and
I
> believe before the cciss driver is getting unloaded. The last messages
I
> am able to see are:
> 
> md: stopping all md devices.
> md: md0 switched to read-only mode.
> 
> After this I get the panic, on other systems I believe the following
> messages come (DL380 g4 with 6i controller):
> 
> cciss: stopping all cciss devices.
> cciss: removing controller 0
> 
> The last 3 lines of the panic are:
> 
> Code: 0f 0b 5d 93 12 a0 ff ff ff ff 7d 01 0f b7 5d 02 85 db 74 08
> RIP <ffffffffa011d0f4>{:ext3:dx_probe+427} RSP
<00000102259338e8>
>  <0>Kernel panic - not syncing: Oops
> 
> I can not reproduce this problem with a DL380 g4 with 6i controller.
> Tried
> the included cciss driver in EL4 Update 5 and the one provided by HP.
No
> difference.
> 
> Any tips what to look at would be appreciated.
> 
Have been able to reproduce it on yet another system but here I was able
to catch the top of the panic with " dx_probe: Unrecognised inode hash
code 28" on cciss/c0d0p6, which is the / file system.