Christian Horn wrote:

On Fri, Oct 12, 2007 at 12:14:02AM -0400, IDAGroup - R.W.Muller wrote:

Hi, I found lots of threads where people talk about domU kernel sitting in /boot of dom0. The only kernel I can see there is the one the machine and dom0 booted from (vmlinuz-2.6.18-8.el5xen)

Two places are common:
- domU-kernel placed on dom0-filesystem directly, 'kernel' option in xen-
 config for the domU is used then. Only possible for paravirt-domU.
 pros: - kernel is directly reachable from dom0

cons: - domU depends on files outside of its disc-image, so you have to keep an eye of what domU uses what kernel-file

 - on upgrading the domU-kernel is a bit more complicated, keep
 kernel, maybe existing initrd and modules-directory in sync
- domU-kernel placed inside the domU-diskimage. Works for both HVM and
 paravirt-domU. One sees mostly this nowadays. Kernel is located/booted
 by pygrub (or a script mounting the partition, making a copy of the
 kernel inside to dom0, and starting it then)
 pros: - easy updating, i.e. just 'yum update' from the domU updates the
 kernel, initrd, modules and kernel is booted on next domU-boot

You forgot the con.

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