Linux Kernel Journey

May 13, 2026 · Fundamentals

Optimizing this_cpu_ops on ARM64: Insights from Yang Shi’s LSF/MM/BPF Series

The article explains how per‑CPU data is accessed on x86 versus ARM64, details Yang Shi’s proposal to make this_cpu_* APIs return a uniform virtual pointer across CPUs, and presents benchmark results showing up to 18% kernel sys‑time improvement and 8.5% stress‑ng speedup.