samba - Feb 2010 - shadow_copy script example leads to system hang?

I don't know if this was present (maybe not?) when the script was written,
but
the script for taking a snapshot in the instructions for shadow_copy: that looks
like this:
----
xfs_freeze -f /home/
lvcreate -L10M -s -n $SNAPNAME /dev/Home/lvol0
xfs_freeze -u /home/
mkdir /home/shadow_share/@GMT-$SNAPNAME
mount /dev/Home/$SNAPNAME \
       /home/shadow_share/@GMT-$SNAPNAME -onouuid,ro
----
Causes an, apparently, well-known system hang when you do the lvcreate.  

The workaround is to NOT use xfs_freeze.  I don't know if this is a kernel
bug -- haven't gotten things tracked down far enough yet, but I can
confirm that the above does cause a hard hang that eventually requires 
rebooting the system to unwedge everything.

kernel = 2.6.27.29 from OpenSuse 11.1

Samba = 3.4.3-12

lvcreate from lvm2-2.02.39-8

The notes I read inidicated a problem in the kernel or maybe, more specifically
the xfs in the kernel.  Will have to check with xfs folks to see if they've
heard of this...

Have yet to sub to the lvm list...(TODO(byme): sub lvm list)

-linda