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

On Tue, Jun 04, 2019 at 03:29:32AM +0800, Alex Williamson wrote: > 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 Got it. Also thank you and all for discussing and guiding all along:) We'll move to the next episode now.