On Fri, Feb 27, 2026 at 02:35:42PM -0800, David Matlack wrote: > > Live migration support, it's the primary use case currently where we > > have vfio-pci variant drivers on VFs communicating with in-kernel PF > > drivers. Thanks, > > I see so you're saying if those users wanted Live Update support and > we didn't do (3), they would have to give up their Live Migration > support. So that would be additional motivation to do (3). > > Jason, does this change your mind about whether (3) is worth doing, or > whether it should be prioritized over (2)?
No, not at all. Live migration of VFIO devices has turned into a valuable but niche feature. This live update is a different niche feature. I don't see an issue with making them exclusive as the starting point. I think people will eventually be interested in having live update as an option on otherwise live migration capable hypervisors, but that brings a whole other set of problems that are hard to solve.. > software with minimal impact to the VM. Live Update really shines in > scenarios where Live Migraiton is untenable, since host upgrades > require VM terminations. Yes, exactly. It is more important to bring a new capability than to optimize something existing. Jason
