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Re: [Xen-users] Re: 32 bit versus 64 bit

  • To: Sami Haahtinen <ressu@xxxxxxxxxxxx>
  • From: Nicholas Lee <emptysands@xxxxxxxxx>
  • Date: Sun, 27 Nov 2005 08:23:29 +1300
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Sat, 26 Nov 2005 19:23:31 +0000
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On 11/27/05, Sami Haahtinen <ressu@xxxxxxxxxxxx> wrote:

> I'm hoping to start with 32 bit version, and upgrade to 64 bit later on
> when it is better integrated, by upgrading to 64 bit Dom0 and switching
> the DomU kernels from 32 bit to 64 bit and dealing with the userland
> later on.

Switching domU is obviously easy enough.  Switching dom0 and xen.gz
are both going to be difficult.  I'd recommend against it.

Problem is you have to upgrade both the userland and kernel at the
same time, as xend needs to be 64bit. Its probably possible to:

i) upgrade xen.gz and dom0 kernel to 64bit, turn off xend.  Would have
to cross compile.
ii) Create a chroot, and install new 64bit userland into that
iii) Reboot with new chroot as root
iv) Check everything and start xend.

Mistakes are likely to happen at many places, and the above is
specific for Debian. Not sure about other distributions. I decided
against it myself.

Nicholas Lee
gpg 8072 4F86 EDCD 4FC1 18EF  5BDD 07B0 9597 6D58 D70C

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