• [$] A new type of spinlock for the BPF subsystem

    From LWN.net@1337:1/100 to All on Wed Apr 9 15:45:07 2025
    [$] A new type of spinlock for the BPF subsystem

    Date:
    Wed, 09 Apr 2025 14:33:25 +0000

    Description:
    The 6.15 merge window saw the inclusion of a new type of lock for BPF programs:
    a resilient queued spinlock that Kumar Kartikeya Dwivedi has been working on for some time. Eventually, he hopes to convert all of the spinlocks currently used in the BPF subsystem to his new lock.
    He gave a remote presentation about the design of the lock at the
    2025 Linux Storage, Filesystem,
    Memory-Management, and BPF summit.

    ======================================================================
    Link to news story:
    https://lwn.net/Articles/1016674/


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