running 64-bit Xen guests on a 32-bit  dom0.   
-》NO


xen  and dom0   is  x86_64 



when domU is x86_64 , problem happens 
when para  32bit  domU , crash can work correctly.



> Date: Thu, 27 Oct 2011 09:45:00 -0400
> From: anderson@redhat.com
> To: crash-utility@redhat.com
> Subject: Re: [Crash-utility] [help]crash can't anaylyse xen guest paravirtulized linux vmcore
>
>
>
> ----- Original Message -----
> >
> > On the off-chance that you've hit this particular one (there's no
> > clear indication) - taking a dump of a 64-bit guest from a 32-bit
> > host will not work. libxc bug that gave me no end of grief.
>
> Interesting...
>
> I noticed that he used a 32-bit HVM guest an example of a successful
> xm dump. Red Hat never supported running 64-bit Xen guests on a 32-bit
> dom0.
>
> Dav! e
>
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