[Pkg-xen-devel] Re: Bug#390862: -bigmem version of xen kernels is really needed

Pasi Kärkkäinen pasik at iki.fi
Tue Dec 12 13:18:01 CET 2006

On Tue, Dec 12, 2006 at 12:54:31PM +0300, Nikita V. Youshchenko wrote:
> What about idea not to *add* pae versions of xen kernels, but to *replace* 
> non-pae versions with pae versions?
> Rationale:
> - not increase in archive size or linux-2.6 package build time,
> - this will improve compatimility with other distros (consider scenario 
> when running FC or RHEL in domU; these distros do ship only pae xen 
> kernels, according to 
> http://lists.alioth.debian.org/pipermail/pkg-xen-devel/2006-December/000998.html)


"Any x86_64, or ia64 CPU is supported for running para-virtualized guests.
To run i386 guests requires a CPU with the PAE extension."

So FC6 is PAE only, and latest update to FC5 also switched to PAE xen

RHEL5 will be PAE only too.

I don't know what Suse uses..

-- Pasi
> - pae kernels are ok for any x86 machines; slowdown caused by enabling pae 
> on machines with less than 3.%G of memory, if any at all, is hardly 
> measurable on machines where using xen makes sence (anyone using xen on 
> Pentium-I with 128M of ram?)

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