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Re: [Xen-users] xen3 domU on xen4 dom0

To: Wolf Grossi <wg@xxxxxxxxxxxxxx>
Subject: Re: [Xen-users] xen3 domU on xen4 dom0
From: Todd Deshane <todd.deshane@xxxxxxx>
Date: Tue, 8 Feb 2011 15:26:50 +0000
Cc: Xen List <xen-users@xxxxxxxxxxxxxxxxxxx>
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On Tue, Feb 8, 2011 at 2:17 PM, Wolf Grossi <wg@xxxxxxxxxxxxxx> wrote:
> Greetings!
> Trying to to run a xen3 domU on a xen4 dem0 I run into problems.
> The xen server 'XEN1'(dom0) is openSUSE-11.3 (kernel 2.6.34) and xen-4.0.1.
> With qemu I created an image 'M08.raw' from the SUSE-9.3
> (kernel 2.6.11) and XEN-3.0 installation CD's.
> The XEN modules were included in the installation.
> In M08.raw/boot I configured grub/menu.lst:
> ...
> title XEN
>    kernel (hd0,1)/boot/vmlinuz-xen root=/dev/hda2 vga=0x314 selinux=0
>  splash=silent resume=/dev/hda1  showopts
>    module (hd0,1)/boot/initrd-xen
> ...
> dumU configuration in /etc/xen/vm/M08:
> bootloader = "/usr/bin/pygrub"
> memory = 1024
> name = "M08"
> vcpus=1
> disk = [ 'tap:aio:/var/lib/xen/images/M08/M08.raw,hda,w' ]
> vif=[ 'mac=00:16:3e:00:a0:08,bridge=br0', ]
> With
> xm create -c M08
> I get the following error:
> XEN1:/etc/xen/vm # Error: (2, 'Invalid kernel', 'elf_xen_note_check: ERROR:
> Xen will only load images built for Xen v3.0\n')
> I do not uderstand the above error: the kernel to be loaded *is* a xen-3.0
> kernel and should be taken from domU:/boot.
> Now I have the following questions:
> 1) Can I run xen-3 domU's on a xen-4 dom0?
> 2) If yes (hope so :-), what's wrong with the above install/config,
>   or what have I missed?

You need the "top" Xen version to run as an HVM guest on the bottom
Xen. So, for your case, make your Xen3 Xen domU an HVM domain. That
should work.

Hope that helps.


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