RE: [Xen-users] Xen 3.0 - dom0 with 32bit userland vs domU with 64bit userland?

["Petersson, Mats" <mats.petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Nicholas Lee
> Sent: 05 October 2005 11:18
> To: xen ml
> Subject: [Xen-users] Xen 3.0 - dom0 with 32bit userland vs 
> domU with 64bit userland?
> 
> Is there likely to be a problem with running a AMD64 64bit 
> dom0 kernel with standard 32bit userland. Then running 64bit 
> domU kernels with a mix 32, 64 or 32/64 bit userlands?
> 
> I'm thinking that the above should just work, but if there 
> are some gotcha's I should be aware off it would save me some 
> time in system development on this new v20z Xen system I'm building.

That's what I'd be thinking too, and I'm not aware of any gotcha's in
this area [somone else with more experience in this combo might be able
to tell more]. For now [1], all kernels need to be the same bitness and
PAE-ness, but the standard 64-bit kernel supports 32-bit apps, and that
should just work, whether it's on top of Xen or not shouldn't make any
difference. 

[1] Once virtualization HW becomes available, there will be a
possibility of running a 64-bit Xen/Dom0 with 32-bit OS's as guests. But
at the moment, Virtualization hardware isn't publicly available from
either AMD or Intel. I don't know what timescales this will be made
available... 

--
Mats
> 
> Thanks,
> --
> Nicholas Lee
> http://stateless.geek.nz
> gpg 8072 4F86 EDCD 4FC1 18EF  5BDD 07B0 9597 6D58 D70C
> 
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