folio_remove_rmap_pmd(9)

📦 version 7.3.1, in nixpkgs unstable

💅 folio_remove_rmap_pmd — like, the whole kernel API manual vibe ✨

okay so bestie, welcome to the Kernel API Manual 🎀 — yes, that's the manual name, we're doing this properly — and today's main character is folio_remove_rmap_pmd(9). Buckle up 🦋

✨ NAME ✨

folio_remove_rmap_pmd — removes a PMD mapping from a page range of a folio 💅 no cap, that's literally the whole job

🌸 SYNOPSIS 🌸

void folio_remove_rmap_pmd (struct folio *folio , struct page *page ,
       struct vm_area_struct *vma );

that's it, that's the signature, copy it exactly bestie 🫶

🎀 ARGUMENTS 🎀

  • folio — the folio we're removing the mapping from, like, the star of the show 👑
  • page — the first page to remove. first one. the beginning. the main character of the range 🌟
  • vma — the vm area from which the mapping is removed, iykyk 🦋

⭐ DESCRIPTION ⭐

okay so the page range of the folio is defined by [page, page + HPAGE_PMD_NR) — that's the range, that's the math, don't come for me 🔥

🚨 real talk: the caller needs to hold the page table lock. like, actually. not optionally. hold the lock, bestie, or it's giving undefined behaviour energy 💀

👑 SEE ALSO 👑

because we're thorough and we link everything fr fr — all from the kernel file ./mm/rmap.c:

and that's the page!! 🧚‍♀️ she lives in ./mm, she's dated October 2026, and she's filed under folio_remove_rmap_pmd(9) — mwah, slay, periodt 💜🎀

📦 where this page comes from