[Xen-users] Re: kexec into xen

[Jakob Praher <jp@xxxxxxxx>]

Hi Mark,

thanks for your information.

Mark Williamson wrote:
> > I have a question: Is it possible to kexec into a xen vmm from a non-xen
> > kernel? In my vision it would be interesting to boot from a generic
> > linux installer, then analyze the hardware and boot into a suitable xen
> > kernel, that loads a dom0 linux kernel.
> Yes, that should be doable.  Tim Deegan wrote a patch that allowed kexec to 
> boot multiboot images like Xen.  I believe it's been in the upstream kexec 
> tools for quite a while.  You specify Xen as the kernel, followed by XenLinux 
> as a module and (optionally) an initrd (as another module).
That sounds very interesting.
> > Do you know anybody interested in this?
> What sort of applications were you thinking of?  Selecting between 32-bit, PAE 
> and 64-bit perhaps?
I am trying to build a cheap xen cluster. And I thought of booting 
various computers using a generic bootable image (.e.g live-cd) and then 
prepare the network environment and boot into a xen vmm form the 
existing system. This allows us to deploy updates on the shared storage 
(e.g. nfs) without adding the need to update the cd-roms.
-- Jakob


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