Device Keepalive State for Local Live Migration and VMM Fast Restart

Explore device keepalive state techniques for local live migration and VMM fast restart in this 22-minute conference talk by Jason Zeng from Intel. Gain insights into the problem recap, solution spectrum, and the concept of VMM Fast Restart. Delve into the two incremental stages of device keepalive state, including example commands for implementation. Learn about preserving and recreating specific components, maintaining IRQ and DMA alive states, and handling VFIO device ownership and PCI enumeration. Understand the current status and future plans for this technology in the context of KVM virtualization.

KVM FORUM
Recap of Problem
Solution Spectrum & Where is VMM Fast Restart intel.
Overview
Device Keepalive State
Two Incremental Stages Stage-1 Keepalive States
Example Commands for VMM Fast Restart intel.
What to Preserve, What to Re-create
Keep Alive States
Keep IRQ Alive
Preserve/Restore pi_desc
Preserve/Restore IRTE
Keep DMA Alive
VFIO Device Ownership
PCI Enumeration
Status & Future Plan