Re: [libvirt] [PATCH v4 0/2] introduction of migration_version attribute for VFIO live migration

On Thu, 30 May 2019 20:44:38 -0400 Yan Zhao <yan.y.zhao(a)intel.com&gt; wrote: > This patchset introduces a migration_version attribute under sysfs of VFIO > Mediated devices. > > This migration_version attribute is used to check migration compatibility > between two mdev devices of the same mdev type. > > Patch 1 defines migration_version attribute in > Documentation/vfio-mediated-device.txt > > Patch 2 uses GVT as an example to show how to expose migration_version > attribute and check migration compatibility in vendor driver. Thanks for iterating through this, it looks like we've settled on something reasonable, but now what? This is one piece of the puzzle to supporting mdev migration, but I don't think it makes sense to commit this upstream on its own without also defining the remainder of how we actually do migration, preferably with more than one working implementation and at least prototyped, if not final, QEMU support. I hope that was the intent, and maybe it's now time to look at the next piece of the puzzle. Thanks, Alex