Re: [Xen-users] Separate kernel on domU's

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

On Wed, Feb 22, 2012 at 8:28 PM, jacek burghardt
<jaceksburghardt@xxxxxxxxx> wrote:
> I store my kernels in /home/xen/boot and this is my config file.
> I don't see how kernel could get messed up domu can't write back to dom0.
> You can always copy kernel separate dir.

Sure.

But the original question was about using the SAME kernel for dom0 and
domU. You're talking about using the same kernel for all domU, but
DIFFERENT from the one used in dom0.

When using the same kernel and initd, it's possible (for example) if
you make certain changes to dom0 kernel (e.g. put some drivers like
xen-blkfront as module) or initrd (e.g. change which modules are
included, from "most" to "dep" in ubuntu), it will cause dom0 to still
boot fine but domU stops working (in the example it was because domU's
disk driver was not included).

Another example is when you have iptables as module, then update dom0
kernel, but don't copy the corresponding /lib/modules directory to
domU. In that case domU's iptables will stop working.

-- 
Fajar

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