[Xen-users] (Live-)Migration fails?!

["Rustedt, Florian" <Florian.Rustedt@xxxxxxxxxxx>]

Hello list,

While migrating, i get an error that the vbd could not be mounted because of 
the file is loop-mounted.
This is not true, nor the /proc/mounts, neither an umount /dev/loop0 results in 
any mounts concerning loopback-devices....

What do i have to do now to solve this?

Kind regards, Florian
[Xen 3.3, two identical HP-server, identical OS, same storage, same mountpoint]

------------------------------------------------
[2009-02-12 10:11:00 5952] ERROR (XendCheckpoint:327) Device 2053 (vbd) could 
not be connected.
File /VirtualMachines/Templates/Suse_hda5 is loopback-mounted through 
/dev/loop0,
which is mounted in a guest domain,
and so cannot be mounted now.
Traceback (most recent call last):
  File "usr/lib64/python2.5/site-packages/xen/xend/XendCheckpoint.py", line 
325, in restore
    dominfo.waitForDevices() # Wait for backends to set up
  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", line 
848, in waitForDevices
    self.getDeviceController(devclass).waitForDevices()
  File "usr/lib64/python2.5/site-packages/xen/xend/server/DevController.py", 
line 156, in waitForDevices
    return map(self.waitForDevice, self.deviceIDs())
  File "usr/lib64/python2.5/site-packages/xen/xend/server/DevController.py", 
line 192, in waitForDevice
    (devid, self.deviceClass, err))
VmError: Device 2053 (vbd) could not be connected.
File /VirtualMachines/Templates/Suse_hda5 is loopback-mounted through 
/dev/loop0,
which is mounted in a guest domain,
and so cannot be mounted now.
xen1 ~ # mount
/dev/sda1 on / type xfs (rw,noatime)
/proc on /proc type proc (rw,nosuid,nodev,noexec)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec)
udev on /dev type tmpfs (rw,nosuid,size=10240k,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,gid=5,mode=620)
/dev/sda6 on /tmp type xfs (rw,noatime)
/dev/sda7 on /usr/portage type xfs (rw,noatime)
shm on /dev/shm type tmpfs (rw,noexec,nosuid,nodev)
none on /config type configfs (rw)
none on /dlm type ocfs2_dlmfs (rw)
usbfs on /proc/bus/usb type usbfs (rw,noexec,nosuid,devmode=0664,devgid=85)
/dev/drbd0 on /VirtualMachines type ocfs2 (rw,_netdev,heartbeat=local)
xen1 ~ # umount /dev/loop0
umount: /dev/loop0: not mounted
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