pmd_clear_huge(9)

📦 version 7.3.1, in nixpkgs unstable

💅 pmd_clear_huge — Kernel API Manual ✨

okay so bestie, welcome to the Kernel API Manual entry for pmd_clear_huge(9) — yes it's a real manpage section nine situation and yes we're gonna read it together 🫶

✨ NAME ✨

pmd_clear_huge — clear a kernel PMD mapping when it's set 🎀

Like, if the PMD mapping is chillin' there all set, this is the function that un-sets it. Very "pack up your stuff, we're leaving" energy. 💅

🌸 SYNOPSIS 🌸

int pmd_clear_huge (pmd_t *pmd );

That's the whole signature, no cap. Returns an int, takes a pointer to a pmd_t. Iconic, minimal, slays. ⭐

🦋 ARGUMENTS 🦋

  • pmd — pointer to the PMD entry you wanna clear. That's it. That's the vibe check. Point it at the entry and let the function do its thing. 💖

🔥 DESCRIPTION 🔥

So here's the tea: pmd_clear_huge returns 1 on success and 0 on failure — and the failure case is specifically when no PMD map is found. 🙈

That's literally it, bestie. One job, done well. No drama, no surprises, just a clean little 1-or-0 situation. Ngl, sometimes the simplest functions have the most main character energy. 👑

Heads up: the return value is how you know what happened — 1 means it worked, 0 means nothing was found to clear. Don't sleep on checking it. 😭

💜 SEE ALSO 💜

Kernel file ./arch/x86/mm/pgtable.c plus the whole friend group:

Like yes, pmd_set_huge(9) is literally the setter to this getter-adjacent queen — they're a matched set, iykyk. 🌈 And the p4d/pud girlies are all doing the same huge-page dance at different levels. 🧚

okay that's the whole page!! this lil beauty lives in ./arch/x86/mm and the source version/date on the original says October 2026 — so go forth, clear those PMD mappings, and remember: 1 = slay, 0 = no map found, and that's periodt. 💅✨🍓 — xoxo, your kernel group chat 💖

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