page_counte...e_protection(9)

📦 version 7.3.1, in nixpkgs unstable

💅 page_counter_calculate_protection(9) — the Kernel API Manual, but make it make sense

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page_counter_calculate_protection era and honestly? it's giving "vibe check for your memory consumption." no cap, let's get into it 🫶

✨ NAME ✨

page_counter_calculate_protection — literally just checks if memory consumption is in the normal range 🌸

🦋 SYNOPSIS 🦋

void page_counter_calculate_protection (struct page_counter *root ,
struct page_counter *counter , bool recursive_protection );

periodt. that's the whole signature, don't come for me 💅

🎀 ARGUMENTS 🎀

  • root — the top ancestor of the sub-tree being checked 👑 like the main character of the family tree, iykyk
  • counter — the page_counter the counter to update 🌀 (yes bestie, the counter you're updating, we said what we said)
  • recursive_protection — whether to use memory_recursiveprot behavior 🔁 literally just a yes/no on that vibe

💖 DESCRIPTION 💖

so what does it actually do? it calculates the elow/emin thresholds for the given page_counter ⭐ that's the whole job. iconic, honestly.

⚠️ WARNING: this function is not stateless! 😭 not me, not a cute little pure function you can just call whenever. it can only be used as part of a top-down tree iteration — not for isolated queries. fr fr, don't try it, it will not slay 💀

🔥 SEE ALSO 🔥

Kernel file ./mm/page_counter.c — go read the source, bestie, it's right there 📖 and also these absolute icons:

okay that's the whole page, mwah 💋 this lil masterpiece lives in ./mm, and it's the October 2026 edition — so go forth, iterate top-down, and protect those pages like the queen you are 👑🧚‍♀️🍓

📦 where this page comes from