Re: [Xen-users] which kernel does guest use?

["Henning Sprang" <henning_sprang@xxxxxx>]

On 12/19/06, Jan Kalcic <jandot@xxxxxxxxxxxxxx> wrote:
> I'm new in this list even though I've been playing with Xen a lot in
> these last days. Give me a warm welcome please. :)
You're welcome, still, please read some docs before asking questions
here that are obviously well documented. It's also not a bad idea to
try things first before asking the list (with the exception that you
really have no idea where to start ), and then ask a questions about a
concrete problem with a thing you want to do but that does not work.

> During the installation, is the kernel used by guest in para
> virtualization mode the one shipped into the guest's media
> or the one
> running on the host machine? Is it the same also after installation?
It depends very much on which dom0 distribution you install and how you install.

In most cases, you don't install xen paravirtual guests from the
distribution install cd as if you do a bare metal install as most cd's
don't provide a xen kernel, this is simply not possible. (you should
really read at least some of the docs available on how to install
paravirtual guests, then this should be clear quite fast).  The kernel
used is the one provided by your xen packages lying around in /boot of
the Dom0 system. It doesn't have to be the one _running_ on the dom0
machine, but in general it is _available_ on the dom0 machine.

You do this kind of thing when installing in hvm mode. Don't mix them up.
Fedora is a bit different - it's install scripts
(virt.install/virt-manager) install the kernel into the guests block
device, and boot the system via pygrub - there the kernek is inside
the domu.

Henning

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