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Explore the technical challenges and solutions for implementing PCI device live updates in hypervisor environments through this 14-minute conference talk from the Linux Plumbers Conference. Delve into the PCI liveupdate subsystem built on top of the Live Update Orchestrator, which manages PCI devices and their dependencies during live update processes. Learn about the significant modifications required for PCI device probing to support device live updates, where devices must maintain their running state from the previous kernel without disruption from re-initialization procedures. Understand the complexities involved in preserving device state during kernel transitions and discover approaches to solving this challenging problem, with particular focus on GPU device live updating as a major use case for hypervisor liveupdate projects.
