[DRBD-user] {Spam?} Re: Online Verify and Kernel Panic

Lars Ellenberg lars.ellenberg at linbit.com
Mon Oct 11 17:39:00 CEST 2010


On Mon, Oct 11, 2010 at 05:02:40PM +0200, Fabrice Charlier wrote:
> On 10/11/2010 04:02 PM, Lars Ellenberg wrote:
> 
> >Would have been useful to post that nice kernel panic message here.
> 
> http://img176.imageshack.us/img176/5827/11102010.jpg

Ok, the interesting part is
:drbd:w_e_end_ov_req+0x2d/0x155

> >>Anybody else already observed this behavior?
> >>
> >>OS:  Linux server1.ucl.ac.be 2.6.18-194.3.1.el5 #1 SMP Thu May 13
> >>13:08:30 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
> >>
> >>DRBD: # modinfo drbd
> >>filename:       /lib/modules/2.6.18-194.3.1.el5/weak-updates/drbd83/drbd.ko

Please do
cd /lib/modules/2.6.18-194.3.1.el5/weak-updates/drbd83/
gdb -q drbd.ko -ex 'l *(w_e_end_ov_req+0x2d)' -ex q

and post the output here.

If it says "no symbols found", grab the debug .ko first.

If that should not be available, grab a LINBIT support contract,
and have us sort that out for you ;-)

> >>alias:          block-major-147-*
> >>license:        GPL
> >>version:        8.3.2
> >
> >Please use 8.3.8.1,
> >iirc, we fixed some bugs in some code paths with online verify since 8.3.2.
> 
> I'll look at this.

BTW, in case you are unlucky enough to encounter some IO error during
online-verify, and DRBD detaches the disk, and you get unlucky again in
timing, you may then run into something else, which will also Oops, and
has been fixed only after 8.3.8.1. Fix for that is in 8.3.9.

-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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