Bug#526695: linux-image-2.6.26-2-xen-amd64: 64-Bit dom0 can't save/migrate 32-Bit domU

["Jesús M. Navarro" <jesus.navarro@undominio.net>]

I can confirm this behaviour if domU is a paravirtualized etch x686 too; I 
think the severity of this bug should be raised to "important".

Dom0: debian lenny amd64 (2.6.26-2-xen-amd64)
DomU: debian etch i686 (2.6.18-6-xen-686)

From the xen logs:
[2009-07-03 17:12:34 4686] INFO (XendCheckpoint:373) All memory is saved
[2009-07-03 17:12:34 4686] INFO (XendDomainInfo:1283) Domain has shutdown: 
name=migrating-sg id=27 reason=suspend.
[2009-07-03 17:12:34 4686] ERROR (XendCheckpoint:144) Save failed on domain sg 
(27).
Traceback (most recent call last):
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendCheckpoint.py", line 112, 
in save
    forkHelper(cmd, fd, saveInputHandler, False)
  File "/usr/lib/xen-3.2-1/lib/python/xen/xend/XendCheckpoint.py", line 361, 
in forkHelper
    raise XendError("%s failed" % string.join(cmd))
XendError: /usr/lib/xen-3.2-1/bin/xc_save 22 27 0 0 1 failed
[2009-07-03 17:12:59 4686] DEBUG (XendDomainInfo:1897) XendDomainInfo.destroy: 
domid=27
[2009-07-03 17:12:59 4686] DEBUG (XendDomainInfo:1914) 
XendDomainInfo.destroyDomain(27)