Re: [PATCH v2] spapr: Tag pseries-2.1 - 2.11 machines as deprecated

[Daniel P . Berrangé]

On Mon, Mar 11, 2024 at 06:46:53PM +0100, Philippe Mathieu-Daudé wrote:
> Hi,
> 
> On 14/12/23 19:17, Cédric Le Goater wrote:
> > pseries machines before version 2.11 have undergone many changes to
> > correct issues, mostly regarding migration compatibility. This is
> > obfuscating the code uselessly and makes maintenance more difficult.
> > Remove them and only keep the last version of the 2.x series, 2.12,
> > still in use by old distros.
> 
> By the time we get to QEMU v9.2, will pseries-2.12 still be used
> by old distros? (which ones btw?)

That's the wrong question really.

Machine types are there to facilitate live migration, and by
extension also handle save/restore to disk.

So the question is more which distros are likely to ship
new QEMU 9.2, and also still need the ability to incoming
migrate from an older version of their distro where 2.12
(or a downstream equiv) was a fully supported machine type.

With regards,
Daniel
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