[libvirt] [PATCH 00/22] qemu: Store default CPU in domain XML

[Andrea Bolognani]

On Thu, 2019-10-03 at 16:00 +0200, Jiri Denemark wrote:
> When starting a domain without a CPU model specified in the domain XML,
> QEMU will choose a default one. Which is fine unless the domain gets
> migrated to another host because libvirt doesn't perform any CPU ABI
> checks and the virtual CPU provided by QEMU on the destination host can
> differ from the one on the source host.
> 
> With QEMU 4.2.0 we can probe for the default CPU model used by QEMU for
> a particular machine type and store it in the domain XML. This way the
> chosen CPU model is more visible to users and libvirt will make sure
> the guest will see the exact same CPU after migration.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1598151
> https://bugzilla.redhat.com/show_bug.cgi?id=1598162

Also, this is definitely a user-visible change significant enough to
be documented in the release notes, so please provide a patch that
does so :)

-- 
Andrea Bolognani / Red Hat / Virtualization