[Drbd-dev] drbd 8.0.0 over IP over infiniband crashes

Goswin von Brederlow brederlo at informatik.uni-tuebingen.de
Wed Feb 21 08:06:10 CET 2007

Lars Ellenberg <Lars.Ellenberg at linbit.com> writes:

> / 2007-02-18 19:25:06 +0100
> \ Goswin von Brederlow:
>> Ok,
>> here we go. I got it to crash again after 3 days of running bonnie
>> (mostly on ext3). This time the crash was while testing reiserfs on
>> the drbd devices and it is only an oops. Before it crashed when
>> syncing the drbd itself and I had to reset.
>> Does this look drbd related at all or just reiserfs screwing up?
> reiser seems to think it runs on "dm-3";
> do you use drbd as PV?

Yes. 6 drbd as PVs with a LV with 6 stripes on it.

> anyways, I don't see anything drbd related in that kernel log.
> more something about reiserfs not behaving during memory pressure
> (within xen; this may or may not be relevant).

The system has 4G and nothing running on it so that shouldn't
happen. Unless there is a leak in the kernel.

> I read it like: reiser tries to delete something, which for some reason
> is not where it is expected (may be in memory data corruption, may be
> some bad timing and race in reiserfs, may be a logic bug somewhere),
> then tries to allocate an error buffer, which it does not get for some
> reason; but it then dereferences that buffer pointer anyways. boom.

I would have expected some bluesmoke messages on bad memory.

> it may still be drbd related in the sense that drbd may add to the
> memory pressure... but nothing we can fix in drbd.


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