openstack team mailing list archive

[Soren Hansen <soren@xxxxxxxxxxx>]

2011/8/4 Ewan Mellor <Ewan.Mellor@xxxxxxxxxxxxx>:
>> You don't *need* to run 64-bit Linux on the host, but if you're
>> running a 32-bit Linux kernel on the host, you'll be limited to 32-bit
>> guests as well (at least with KVM (for now), not sure about the
>> others).
> A similar thing is true of Xen too -- a 32-bit hypervisor limits you to 32-bit guests.  XenServer runs a 64-bit hypervisor and a 32-bit domain 0.

FWIW, VMWare actually manages to do this (at a slight performance
penalty). The CPU of course must be 64-bit capable, but the host
kernel can be 32 bit.

-- 
Soren Hansen        | http://linux2go.dk/
Ubuntu Developer    | http://www.ubuntu.com/
OpenStack Developer | http://www.openstack.org/