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Explore the implementation of live-update support for Linux networking drivers in this 17-minute conference talk from the Linux Plumbers Conference. Delve into the specialized reboot process that preserves selected devices and kernel state to minimize disruption in cloud environments, with a focus on enabling hypervisor updates while keeping virtual machines running with minimal interruption. Examine the challenges of implementing live-update for complex devices like IDPF, including mechanisms for preserving device state such as hardware registers, transmit/receive rings, and internal state for SR-IOV virtual functions and physical functions. Learn about integration strategies with core kernel subsystems including PCI and IOMMU to ensure seamless state preservation and restoration during the live-update process.
