zfs kernel panic

Gerrit Kühn gerrit at pmp.uni-hannover.de
Tue Sep 8 15:23:37 UTC 2009

Hi folks,

I just upgraded a zfs server from 7.0-something to 7.2-stable and hoped to
get rid of some minor instabilities I experienced every 6 months or so.
Unfortunately, the new system crashed for the first time after only a few
hours when copying some files via scp onto it.
I got a kernel panic which looked quite similar to the one reported here
(kmem_map too small):

I have a dual cpu dual core opteron system with 4GB of RAM and a 3-disk
raidz1. I took out the memory settings from loader.conf as suggested in
UPDATING. I did not yet upgrade zpool nor zfs version (would that help?).
Are there any known issues or any further hints what might cause the
crash? I copied the files again, but this time everything went fine.


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