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Explore memory preservation techniques through the Live Update Orchestrator (LUO) in this 13-minute conference talk from the Linux Plumbers Conference. Learn how LUO enables userspace applications to transfer resources identified by file descriptors to the next kernel during live updates. Discover why memory, as one of the kernel's most fundamental resources, serves as an ideal candidate for LUO implementation through memfd (memory file descriptors). Examine the technical design behind memfd preservation using LUO, understand the current implementation status, and explore planned future developments. Gain insights into how this approach facilitates seamless kernel updates while maintaining critical memory resources, making it particularly valuable for systems requiring high availability and minimal downtime.
