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RE: [Xen-users] Re: Custom DomU kernel
- To: "BB Mailing list" <bb.mlist@xxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
- From: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
- Date: Tue, 24 Oct 2006 15:57:56 +0200
- Delivery-date: Tue, 24 Oct 2006 07:00:44 -0700
- List-id: Xen user discussion <xen-users.lists.xensource.com>
- Thread-index: Acb3cZvBL28vWuxfRbSXpToTuHkQmQAAjjfA
- Thread-topic: [Xen-users] Re: Custom DomU kernel
Hi Xen list, I had Xen 3.0.2 (from the xensource.com binary
packages) running on an Ubuntu 6.06 (with a 2.6 kernel). I made an
image of a Redhat Advanced Server 3 that I boot fine; my problem is that
the RHAS DomU is booting on the Dom0 2.6 kernel where I would like it to
boot on the 2.4 kernel shipped with RHAS3. I understand I need to
build a custom 2.4 kernel patched with Xen, but how do I do that? Do I
build this from Dom0? Or DomU? I guess that's a common operation, as a
lot of people are running different kernels on their DomUs, but would
anyone have pointers or advices on how to proceed?
The only way to (without a
lot of hard work) get a 2.4 kernel onto a Xen system is to use the HVM
feature - but that means that you need a processor with hardware
virtualization to do that...
--
Mats
Any help greatly
appreciated.
Cheers,
Quentin.
Hi,
Thanks for the quick reply - what would a lot of hard work
imply? Having this configuration and the RHAS image running was quite a lot of
hard work as well, so I'm not scared :)
Figuring out how to apply the patches developed by Xen for 2.6 onto a 2.4
kernel, and fix any problems that arise from the fact that the 2.4 kernel is
different from 2.6, so you may need patches in different places than they are
for 2.6. The xen 2.0 hypervisor has patches for Linux 2.4 kernels, so you may be
able to get an idea of how it works from that - but the Xen 2.0 hypervisor is
different from 3.0 in several aspects, which would mean that the patches need to
be different - so if you compare the 3.0 patches for 2.6 and 2.0 patches for
2.6, you'd see how different (and I haven't done this) the patches are for the
different Xen versions. Based on that, you should be able to determine what the
work needed for 2.4 is... But since there hasn't been any announcement of such a
patch being available, I suspect it's not trivial...
--
Mats
Cheers,
Quentin
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