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Re: [Xen-users] xen-install on existing debian etch

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Subject: Re: [Xen-users] xen-install on existing debian etch
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Date: Wed, 09 May 2007 13:25:20 +0200
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Iñaki Baz Castillo wrote:
Installing xen-linux-system-2.6.18-4-xen-686 will add the Grub xen entry.
Note that this entry include:
  xen-3.0.3-1-i386-pae.gz - The Xen core system that manages dom0 and
domU's. vmlinuz-2.6.18-4-xen-686 - The Xen capable kernel for dom0 (and
maybe domU).
Is it really *-pae? I thought there were to different systems, one with
pae (for special hardware?), one without?

~# apt-cache show xen-hypervisor-3.0.3-1-i386-pae
 The hypervisor is the "core" for XEN itself.  It gets booted by the boot
 loader and controls cpu and memory, sharing them between your
 administrative domain (Domain 0) and the virtual guest systems.
 This version of the hypervisor is built with PAE enabled, in order to
 support systems with more than 4GB of memory.  If you have less than that
 you should probably choose the non -pae version.
 In order to boot a XEN system along with this package you also need a
 kernel specifically crafted to work as the Domain 0, mediating hardware
 access for XEN itself.

Note that if your dom0 kernel support PAE then xen-hypervisor MUST support PAE, and the same with domU. The Debian Etch Xen kernel DOES support PAE, so you NEED xen-hypervisor-pae. If not dom0 won't start.

Ah, thanks for making that clear. I have 2gigs of memory, but I guess PAE is supposed to run with systems less than 4G as well?


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