Re: [Fedora-xen] More then 16GB with FC6 or FC7?

[Gerd Hoffmann <kraxel redhat com>]

Daniel P. Berrange wrote:
> On Wed, Jun 27, 2007 at 05:00:13AM -0400, thewird wrote:
> > Is there any way to make the xen kernel see more then
> > 16GB of ram when its installed on a 32bit OS (either
> > FC6 or FC7)?
>
> No it is an architectural limitation of Xen that 32-bit is limited to
> a maximum of 16 GB, even with PAE.

Well, there is one from the dirty tricks department:  Install 32bit fc7, 
pull 64bit xen kernel from the 64bit kernel-xen rpm, boot that with the 
32bit linux kernel.

Mixing 32bit and 64bit guests isn't going to work for the time being 
(needs a kernel update).  But with the 64bit hypervisor underneath the 
system should be able use all memory, even with 32bit guests only.

cheers,
  Gerd