Re: [Xen-devel] [PATCH 1/7] libxl, Introduce dm-version xenstore key.

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2011-10-07 at 18:35 +0100, Ian Jackson wrote:
> Ian Campbell writes ("Re: [Xen-devel] [PATCH 1/7] libxl, Introduce dm-version 
> xenstore key."):
> > This would be a bug, since it would imply an inconsistent version of
> > libxl was used to create the domain? (not sure what our policy around
> > this actually is / should be).
> 
> No, because the same toolstack can create domains with either version
> of qemu.

Such a toolstack would always write the node to one value or the other.

The case I'm referring to is when the domain was created by one version
of libxl (which doesn't write the node) but is now being acted upon by a
new one (which does write & check it), perhaps due to an intervening
upgrade.

There is no way to know which version of qemu was used in this scenario
but I question whether it is something we should support in any case (at
least outside of stable branches).

Ian.

> 
> Ian.



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