Re: [Xen-users] truecrypt & kernel 2.6.24

["Fajar A. Nugraha" <fajar@xxxxxxxxx>]

On Tue, Jun 2, 2009 at 3:44 PM, Rudi Ahlers <rudiahlers@xxxxxxxxx> wrote:
> Hi Fajar, I'm trying to access an encrypted HDD on the dom0, not in a
> domU. In fact, I don't have any domU's setup on that server yet. So,
> how will this work for dom0 then? I have honestly never compiled a
> custom XEN kernel before, and the last time I even compiled any
> kernels was on FreeBSD 4.6 & RedHat 4 - a long time ago.

That would be harder then :P
dom0 kernels are somewhat tricky. For example, Lenny's kernel worked
fine for me on domU, but it crashed when used as dom0 on RHEL5.

If you don't want to compile a kernel, your best bet would be to use a
distro that supports newer xen kernels out of the box. Debian Lenny is
one of them. Opensuse is another.

If you want to compile dom0 pv_ops kernel, Boris' blog should provide
some info : http://bderzhavets.wordpress.com , look for "How to
install pvops enabled kernel"

Or you could go the old -xen kernel method using patches from
http://code.google.com/p/gentoo-xen-kernel/downloads/list


> Ok, but what will happen when I run yum update? Can / will it
> overwrite the custom kernel, or will it give me errors?

Kernel packages shouldn't overwrite each other, as they have different
files/directories.

>>> Here's the output from the machine:
>>>
>>> Linux zaxen02.lan 2.6.18-92.1.18.el5xen #1 SMP Wed Nov 12 09:48:10 EST
>>> 2008 x86_64 x86_64 x86_64 GNU/Linux
>>
>> This is quite old. Centos 5.2? AFAIK support for pv_ops kernel is
>> available since 5.3.
>
> It's a CentOS 5.2 which has been updated with yum upgrade recently.
> But, running yum update kernel last night gave me this kernel

That's odd. Are you getting stale updates?
http://mirrors.kernel.org/centos/5/updates/x86_64/RPMS/kernel-xen-2.6.18-128.1.10.el5.x86_64.rpm

It doesn't matter much in this case though. My point was if you want
to use pv_ops domU kernel, you need to have relatively new xen
userland, and that your system might not have it yet. Since you want
to use newer dom0 kernel, it shouldn't matter much.

-- 
Fajar

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