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RE: [Xen-users] Kernel 2.6 (domain0) and Kernel 2.4 ( domainU)???

To: "Fabian Holler" <fho@xxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] Kernel 2.6 (domain0) and Kernel 2.4 ( domainU)???
From: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
Date: Fri, 1 Sep 2006 13:01:55 +0200
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Thread-topic: [Xen-users] Kernel 2.6 (domain0) and Kernel 2.4 ( domainU)???

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Fabian Holler
> Sent: 01 September 2006 11:50
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Kernel 2.6 (domain0) and Kernel 2.4 
> ( domainU)???
> Howdy,
> On 01.09.2006 12:41, Bruno Rodrigues Silva wrote:
> > I have Scientific Linux 4 (Kernel 2.6) running at domain0, 
> but i want to
> > use Scientific Linux 3 (Kernel 2.4) ant domainU. How to 
> compile kernel
> > 2.6-xen0 for domain0 and kernel 2.4-xenU for domainU?
> This is only possbile with an HVM machine. Paravirtualized 
> machines are
> using the host kernel.

You can certainly run a different kernel on the PV guest than the Host
kernel. However, it needs to be patched for the Xen hypervisor version
you're using, and that will depend on the patches available to work
correctly. It would THEORETICALLY be possible to back-port the Xen 3
interface from 2.6.16 (or such) to 2.4.x, but not enough people seem to
be sufficently motivated to go through this work.... 

> greetings
> Fabian

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