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[Xen-users] Problem running i386 client under amd64 dom0

I'm running on a Dell PowerEdge 2970 with two dual core Opteron
processors, on which I have installed Debian Etch for x86_64 (amd64).
I'm using xen 3.1.0, which I compiled from a source tarball downloaded
from www.xensource.com, and which seems to have been created on May 18.
The kernel which this creates works, but I have a difficulty getting
certain other software working with it, so I am instead using Debian's
own linux-image-2.6.18-4-xen-amd64, version 2.6.18.dfsg.1-12etch2,
which does not have this problem.  I can easily create a virtual
host using the same kernel and using Debian etch as well.

My problem is that I can't start up a domain using a 32-bit
kernel, for example, Debian's linux-image-2.6.18-4-xen-686 version
2.6.18.dfsg.1-12.  When I try this, the domain creation fails.  The
Xend.log has the message:

[2007-07-11 08:30:52 3061] WARNING (__init__:1072) Domain has crashed:

and the console of the domain contains a long series of messages,
beginning and ending thus:

     BUG: unable to handle kernel paging request at virtual address 98b7dce8
      <0>Kernel panic - not syncing: Fatal exception in interrupt

Isn't xen 3.1 able to run mixed architecture domUs?  Do we need a
special option in the config file to do this?

     -- Owen

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