On Tue, Aug 06, 2024 at 04:35:44PM +0900, Akihiko Odaki wrote: > On 2024/08/05 19:08, Michael S. Tsirkin wrote: > > On Mon, Aug 05, 2024 at 06:37:58PM +0900, Akihiko Odaki wrote: > > > If cross-migrate=off, QEMU can still migrate on the same host (checkpoint > > > and restart). QEMU can also migrate across hosts if the user ensures they > > > are on the same platform. > > > > What is so special about checkpoint/restart? I guess we hope that > > downgrades are uncommon, but they are possible... > > Downgrades will not work with cross-migrate=off. Users who want downgrades > should use cross-migrate=on. We also don't know that upgrades do not disable a feature: can happen if e.g. there's a serious bug in the feature. Basically, this makes the feature too fragile, in my opinion. -- MST
