Comment 21 for bug 1885662

Hi Christian,

Thanks for stopping by and raising this regression possibility to my notice -- greatly appreciated. This is an angle to the topic that I was not aware of.

> And that is the reason why - usually - one is supposed to keep the
> size as-is and if changing it use an extra file for the new size.
> That might explain some of the cases you saw with other
> Distributors.

I think this SRU exactly does this as well. We're not touching the existing OVMF images, instead, we're providing a separate 4MB image. A guest created with the existing 2MB image will continue to use that unless the user decides to switch that guest to 4MB images (manually). But we're indeed changing the default image in the descriptor interface, so subsequently created guests will use the 4MB image instead. There is a possibility for regression if the live migration is using the descriptor interface as well. Otherwise, I'd expect QEMU to use the same OVMF image for the guest, regardless of the series or the edk2 package version.

We should definitely look into the scenarios you have given. I'll test these in the upcoming week, and *hopefully* see the possible impact in more detail.