Live Migrating VFIO, vhost-user, and vfio-user Devices

Explore the intricacies of live migrating VFIO, vhost-user, and vfio-user devices in this informative conference talk presented by Stefan Hajnoczi from Red Hat. Delve into the complexities of migration, including device state management, challenges faced during the process, and the specifics of vhost-user migration. Gain insights into VFIO migration compatibility issues and learn about the advantages and disadvantages of VFIO User Migration. Discover how version upgrades are handled and understand the mechanisms behind these migration techniques. The talk concludes by discussing future directions in this field, providing a comprehensive overview of the current state and potential developments in live device migration for virtualization technologies.

Introduction
How are migration
Device state
Why isnt everything part of device state
Challenges
vhostuser migration
busvmstate
VFIO
Migration Compatibility
Migration Challenges
VFIO User Migration
Upgrading Versions
How does this work
Advantages and disadvantages
Future directions