On 2/12/07, Todd Vierling <tv@pobox.com> wrote:
> On 2/12/07, Matthias Scheler <tron@zhadum.org.uk> wrote:
> > > Runs fine on a PAE mode 32-bit Linux host that you do not have the
> > > option to reconfigure?
> >
> > Out of technical curiosity:
> > Why does a domU have to support PAE? AFAIK the page table is managed by
> > the Hypervisor. Is the interface to the Hypervisor so badly designed
> > that it can't hide such details?
>
> See messages in mail-index:port-xen for August 2006, with the subject
>
>     Xen3/PAE problems with domainU
>
> There are some web link pointers to xen-users in that thread.  What I
> gathered from it without digging for major technical details is that
> the page tables are manipulated in a native-like format in all
> domains, so their structural layout must match in all domains (PAE vs.
> non-PAE).
>
> From a user's perspective, if you try to load a non-PAE-capable domU
> on a PAE host, xend will spit out EINVAL and refuse to complete the
> domain construction.

What about an AMD64 NetBSD domU kernel? :-)