Re: Re: kernel-xen-2.6.25.3-2.fc9.x86_64 don't boot

[Marco Guazzone]

On Sat, Sep 13, 2008 at 12:14 PM, Felix Schwarz <felix schwarz web de> wrote:
> > Marco Guazzone schrieb:
> >
> >    I've just installed the kernel-xen-2.6.25.3-2.fc9.x86_64 on my FC9 for
> >    experimenting with XEN.
> >
> >    Unfortunately when I boot from grub with this kernel (as a host system) the
> >    system reboot after the message:
> >    --- [snip] ---
> >    XEN relinquishing vga console
> >    --- [/snip] ---
> >
>  kernel-xen from FC9 does not provide Dom0 ("host") functionality. Currently
> there is no usable Xen Dom0 in Fedora (besides Fedora 8 where support will be dropped in a
> few months).
>
>  If you want to have a stable Xen Dom0, you should go for CentOS oder RHEL.
>
>  If you just want "virtualization", you should look at KVM which is the upcoming
> "standard" virtualization for RHEL. Red Hat announced a few days ago that they
> think about dropping Xen completely when RHEL 5 is not supported any longer (2014).
>
>  fs 
Thank you for the info... I didn't know that.
Sorry for the question but if I understand the kernel-xen RPM is
unusable, is it?
If so, why does it exist?
If not, how can be used?

Thank you so much!

Cheers,

-- Marco

kernel-xen-2.6.25.3-2.fc9.x86_64 don't boot

[Falko Pilz]

Am Sat, 13 Sep 2008 15:55:15 +0200
schrieb "Marco Guazzone" <marco.guazzone(a)gmail.com&gt;:
>  Sorry for the question but if I understand the kernel-xen RPM is
>  unusable, is it?
>  If so, why does it exist?
>  If not, how can be used? 
It is not useable as a Dom0 but it is needed to run a DomU or in other
words: this kernel is not for use as a control for Xen. It is to use in
a virtual maschine. This kernel uses paravirtops to send syscalls to
the xen hypervisor. 

Regards 

Falko

kernel-xen-2.6.25.3-2.fc9.x86_64 don't boot

[Falko Pilz]

Am Sat, 13 Sep 2008 15:55:15 +0200
schrieb "Marco Guazzone" <marco.guazzone(a)gmail.com&gt;:
>  Sorry for the question but if I understand the kernel-xen RPM is
>  unusable, is it?
>  If so, why does it exist?
>  If not, how can be used? 
It is not useable as a Dom0 but it is needed to run a DomU or in other
words: this kernel is not for use as a control for Xen. It is to use in
a virtual maschine. This kernel uses paravirtops to send syscalls to
the xen hypervisor. 

Regards 

Falko


--

kernel-xen-2.6.25.3-2.fc9.x86_64 don't boot

[Felix Schwarz]

Marco Guazzone schrieb:
>  Sorry for the question but if I understand the kernel-xen RPM is
>  unusable, is it? 
...

It's not "unusable". It just provides DomU functionality so with kernel-xen

you can run a virtualized Fedora as *guest* on a Xen Dom0 which runs under 
Fedora 8 oder CentOS/RHEL 5.

There's work going on to get Xen's Dom0 functionality in the main Linux 
kernel. Then Xen support will re-appear in Fedora (probably even a bit 
earlier). Please consult the archives if you want to learn more about that.

fs

PS: Part of the problem is the behavior of the Xen developers which had other 
priorities than keeping up with the latest Linux kernel versions/getting their 
code into the vanilla kernel. Therefore they put an enormous maintenance 
burden on distributors which Red Hat was not willing to do anymore.