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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