PERCPU_SECTION(9)

PERCPU_SECTION(9) 💅

okay so bestie, this is the Kernel API Manual page for PERCPU_SECTION — and it’s lowkey iconic for such a tiny macro. 🎀

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✨ NAME ✨

PERCPU_SECTION — define output section for percpu area 🦋

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🌸 SYNOPSIS 🌸

PERCPU_SECTION (cacheline );

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🎀 ARGUMENTS 🎀

• cacheline — cacheline size. that’s the arg, bestie 💖

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🦋 DESCRIPTION 🦋

So PERCPU_SECTION is a macro, and it expands to the output section for the percpu area. that’s literally the whole glow-up ✨

The cacheline value is used to align subsections so you avoid false cacheline sharing between subsections for different purposes. no cap, that’s the reason it’s there 💅

lowkey important: cacheline is used to align subsections to avoid false cacheline sharing between subsections for different purposes. periodt 🫶

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🌈 SEE ALSO 🌈

• Kernel file ./include/asm-generic/vmlinux.lds.h — go peek, iykyk 👀
• PERCPU_INPUT(9) — the related page, bestie 🧚

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mwah 💋 — source/version: ./include/asm-generic, date: October 2026, and this is PERCPU_SECTION(9) signing off 🫶💖