importantSYS.SOURCE: Paul Khuong: some Lisp Blog• 2026-07-08T13:38:04Z

Preemption as a Memory Reordering Barrier in Userspace

#memory reordering #lock-free programming #preemption #futexes #concurrency control

The article explores how preemption in userspace can act as a memory reordering barrier, eliminating the need for explicit memory barriers in lock-free programming. It discusses techniques like event counts and futexes to manage synchronization and memory ordering guarantees through interrupt handling and OS primitives.

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