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[Xen-users] Re: kexec into xen

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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