[Users] gfs and localflocks

[frank]

Hi all,
we have a couple of servers with OpenVZ RHEL 5.4 kernel, and sharing a 
GFS filesystem.
We have done some locking tests with "ping_pong" over the GFS 
filesystem, and we have realized that GFS is doing local flocks, not 
distributed ones.
It is not due to mount options:

# mount -t gfs -o rw /dev/volCluster/lvol0 /mnt/gfs

but we got

# grep /mnt/gfs /proc/mounts
/dev/mapper/volCluster-lvol0 /mnt/gfs gfs 
rw,hostdata=jid=1:id=65537:first=0,localflocks 0 0

"localflocks" flag is on! We don't know why. We have the same 
configuration in another pair of servers without OpenVZ, and there it 
works doing distributed locking without problem; so it seems it is 
related to OpenVZ patched kernel.

Can this be a bug? Is there any explanation?

Regards.

Frank



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