pcpu_chunk_refresh_hint(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 NAME 🌸

okay so bestie, welcome to the Kernel API Manual 💅 — this page is all about pcpu_chunk_refresh_hint, and what it does is updates metadata about a chunk. that's the whole vibe. it keeps the chunk's bookkeeping cute and current ✨

🦋 SYNOPSIS 🦋

void pcpu_chunk_refresh_hint (struct pcpu_chunk *chunk , bool full_scan );

🎀 ARGUMENTS 🎀

  • chunk — the chunk of interest 👀 like, the one we're looking at, bestie
  • full_scan — tells us if we should scan from the beginning 🔄

💖 DESCRIPTION 💖

so what it does is iterate over the metadata blocks to find the largest contig area — the biggest contiguous stretch, no cap 🧚

here's the tea: a full scan can be avoided on the allocation path, because this gets triggered if we broke the contig_hint. when that happens, the scan_hint will be before the contig_hint, or after it if the scan_hint == contig_hint 🫶

and ngl? this cannot be prevented on freeing, because when we're freeing we wanna find the largest area possibly spanning blocks. that's the whole point, periodt 💀✨

👑 SEE ALSO 👑

and that's a wrap, bestie 🎀 this page lives in ./mm, dated October 2026, and the whole thing is pcpu_chunk_refresh_hint(9) — mwah, slay, go read your percpu docs 💜🔥

📦 where this page comes from