Fedora xen - Sep 2008 - Re: Re: kernel-xen-2.6.25.3-2.fc9.x86_64 don't boot

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

Am Sat, 13 Sep 2008 15:55:15 +0200
schrieb "Marco Guazzone"
<marco.guazzone@gmail.com>:
> 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

Am Sat, 13 Sep 2008 15:55:15 +0200
schrieb "Marco Guazzone"
<marco.guazzone@gmail.com>:
> 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


--

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.