page_range_contiguous(9)

📦 version 7.3.1, in nixpkgs unstable

💅 page_range_contiguous(9) — the kernel API manual, bestie edition 🎀

okay so this is page_range_contiguous(9) from the Kernel API Manual and honestly it's a little vibe-check function for page ranges. let's get into it ✨

🌸 NAME 🌸

page_range_contiguous — literally just vibes-checks whether the page range is contiguous 🫶

✨ SYNOPSIS ✨

bool page_range_contiguous (const struct page *page , unsigned long
nr_pages );

no cap, that's the whole signature 💅

🎀 ARGUMENTS 🎀

  • page — the start of the page range. like, where the range begins, bestie 📍
  • nr_pages — the number of pages in the range. the count, the quantity, the amount 🔢

🦋 DESCRIPTION 🦋

so what it does is: test whether the page range is contiguous, such that they can be iterated naively, corresponding to iterating a contiguous PFN range. that's the whole thing. it's giving "can I just walk this normally without a whole situation" 🚶‍♀️

and lowkey important: this function should primarily only be used for debug checks, or when working with page ranges that are not naturally contiguous (e.g., pages within a folio are). iykyk — if your pages are already naturally contiguous, you don't need this, don't be extra 🙈

it returns true if contiguous, otherwise false. that's it. binary. iconic ⭐

🔥 SEE ALSO 🔥

Kernel file ./mm/util.c — go look at it, bestie 👀

and that's the whole page, bestie 💖 this one lives in ./mm and it's dated October 2026 — so like, future vibes only 🌈👑 go forth and check your contiguity fr fr 💜

📦 where this page comes from