Live Update Orchestrator
summary
LUO is a kernel framework plus daemon LUOD that coordinates live updates by preserving chosen kernel pages across a kexec reboot (KO added in 6.16) while skipping firmware and keeping DMA and device resources alive; it provides a user API, a state machine, file-handler callbacks (session ownership model), and global objects for shared state (FLB global state). Workflow uses sessions to bind preserved FDs, freeze/unfreeze/retrieve/can_finish callbacks, and a planned LU agent; VFIO/PCI/VFIO MFD handlers are in review and Intel/AMD/ARM64 are targeted.
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chapters (9)
- 0:00Introduction to talk
- 0:42What is live update
- 2:10Kernel components for live update
- 3:39LO sessions and lifecycle
- 5:27File handler APIs
- 7:10FLB global state preservation
- 8:11Live update workflow steps
- 11:21Future work and optimizations
- 13:34Q&A session
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