Kernel panic in ext3:dx_probe, help needed

[Ulf Zimmermann]

> -----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 13:11
> To: ext3-users at redhat.com
> Subject: RE: Kernel panic in ext3:dx_probe, help needed
> 
> > -----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.

Ok, found more information. EL4 sets dir_index for / (cciss/c0d0p6 as we
are installing it). The RedHat provided cciss driver (2.6.14-RH2) has no
problem with that, the latest cciss driver from HP, 2.6.16-6, does.
Turning off dir_index for /, forcing fsck during reboot and everything
is fine.

Ulf.