Re: [Xen-users] Mixing architectures--64bit master, 32bit clients?

[Steven Timm <timm@xxxxxxxx>]

On Tue, 13 Mar 2007, Mark Williamson wrote:

> > Has anyone successfully run the 64-bit Xen hypervisor (open source
> > version) with
> > 32-bit xen virtual machines? If so, are there any pointers to a
> > how-to of what to do, and things you should avoid?
> This ought to work for HVM virtual machines just fine (you can run 32-bit PAE
> or non-PAE guests just fine).
Sorry for the real newbie questions here, but how can I look at my 
existing
xen 3.0.2 installation (installed by someone else before I took over)
and tell which kind of client I've got now, HVM or PAE or non-PAE?
And is there a basic howto that will define some of these acronyms?

Also, when upgrading from Xen 3.0.2 to xen 3.0.4 (kernel 
2.6.16-xen3_86.1_rhel4.1 to 2.16.16.33-)
is there any order that should be followed, i.e. should you
do the master first or the clients first, or does it matter?

Thanks

Steve timm



> For paravirtualised guests, 3.0.4 requires them to have the same paging model
> (i.e. 64-bit / 32-bit, and for the latter PAE or non PAE).
>
> xen-unstable has (I believe) support for mixing paravirtualised 32-bit PAE
> guests and 64-bit paravirtualised guests on a 64-bit Xen.  Dom0 can also be
> 32-bit in this scenario.
>
> Cheers,
> Mark
--
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm@xxxxxxxx  http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Assistant Group Leader.

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