Hi,
>> What's the overhead?
>
> Just some xen specific drivers below drivers/xen/
For dom0?
Yes. The host backend drivers for guest devices. It is just the last
piece to have a useful xen host, everything else has been merged
upstream already. 2.6.37 already can run xen guests without network and
storage devices.
Do we need to build yet another flavour of kernel?
No. The standard kernel which can run as domU (aka xen guest) for a
long time will be able to run as dom0 (xen host) too. Just some config
options need to be enabled.
cheers,
Gerd