Re: [Xen-users] 64bit kernel for 32bit pv DomU in 64bit Dom0

[Pierre-Alain RIVIERE <pariviere@xxxxxxxx>]

Hello,

32 bit userland will always be compatible with 64 bit kernel.

And as far as I know there's no problem to proceed this way  and I do 
the same.

This link also describes 32/64 bit compatibility between Dom0 and DomU.
http://lists.xensource.com/archives/html/xen-users/2007-07/msg00842.html



Andris wrote:
> Hello all!
>
> I read in xen user archive thread where some people asked whether is
> possible to run not modified 32 bit pv DomU's just copying 64bit kernel
> modules in DomU and starting it with 64bit kernel (prepared for pv guests).
> So people in that thread got answer- "may try".
> We have a newer kernels and newer xen since 2006.
> So I have the same situation:
> need to run 32bit Ubuntu distro (commercial product, based on ubuntu
> dapper) on 64bit Dom0 (Gentoo 2007.0, xen 3.1.1).
> I have succes to run in as HVM, but I/O performance is far from desirable.
> I made disk image and cloned that 32bit system on it. Modified fstab
> added swap disk and copied modules directory from 64bit Dom0 and tried
> to boot with my 64bit kernel prepared for 64bit pv guests.
> System booted and seems to be working. Is such approach is ok or I may
> encounter certain problems in future?
>
> andris
>
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>   

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