OPPO Kernel Craftsman
Apr 22, 2022 · Fundamentals
Understanding Linux Kernel Mutex: Mechanism, Data Structures, and APIs
The Linux kernel’s mutex is a sleeping lock that serializes access by sleeping threads, enforces strict ownership rules, uses a state flag with a wait list and per‑CPU optimistic spin queue, offers APIs like mutex_init, lock, unlock and trylock, and employs handoff and MCS‑style spinning to improve performance, with OPPO’s team optimizing it to reduce UI jank.
Linux kernelMutexSynchronization
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