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Re: [libvirt] [PATCH] qemu: use "ide" as device name for implicit SATA controller on Q35



On 09/20/2013 08:15 AM, Laine Stump wrote:

> 
> This will leave one problem  - what to do if someone migrates a guest
> with the new non-0 unit# to a host that's still running old libvirt that
> ignores unit#. I don't see how to get around this problem without having
> knowledge of the source and destination libvirt versions when formatting
> the XML to send across, but that is something we've avoided like the
> plague. So what do we do for new->old migration?

We use the same hacks we do for other migration issues - if the
_MIGRATABLE flag is on during dumpxml, we output the old style (stick it
in the unit slot, since that's what older libvirt expected).

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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