[Evms-devel] EVMS + XFS + NFS + Snapshot problem

[Martin <msc...@gm...>]

Hello,

a while ago I added an EVMS snapshot feature to the XFS-formatted /home volume 
of our cluster. The volume is shared via NFS. Every once in a while all nfsd 
instances are stuck in state D, and the clients are dead, as their roots are 
mounted via NFS from the same server. This usually happens during some heavy 
read/write load. The snapshots are not full, as they are quite large and 
reset every day.

After searching for a while, I managed to break things deterministically by 
resetting the snapshot volume during NFS read/write activity. After switching 
the /home volume to EXT3, the problem does not occur anymore. No specific 
entry is found in the log.

I am using SuSE Enterprise Server 9.0 with the very latest updates 
(kernel_default-2.6.5-7.159) and evms 2.5.2.

Is this a know problem, and if so, what can be done to make this scenario work 
with XFS?

Regards,
Martin Schaffoener