__page_check_anon_rmap(9)

📦 version 7.3.1, in nixpkgs unstable

💅 __page_check_anon_rmap — Kernel API Manual (section 9)

okay so bestie, this whole page is about one little function whose entire job is a sanity check anonymous rmap addition ✨ like, it's the vibe check for anonymous reverse mappings, and honestly? iconic of it.

🎀 NAME 🎀

__page_check_anon_rmap — sanity check anonymous rmap addition 💖

✨ SYNOPSIS ✨

void __page_check_anon_rmap (const struct folio *folio , const struct
page *page , struct vm_area_struct *vma , unsigned long address );

that's the whole signature, no cap 🫶

🌸 ARGUMENTS 🌸

  • folio — The folio containing page. it's the bigger container energy, the folio the page lives inside 🦋
  • page — the page to check the mapping of. yes queen, this is the actual page getting its mapping inspected 👑
  • vma — the vm area in which the mapping is added. like, the memory region where the mapping is getting added in the first place 💜
  • address — the user virtual address mapped. the address, but from the user's side of things 🌈

🦋 SEE ALSO 🦋

so the kernel file is ./mm/rmap.c and honestly the whole friend group is here, go say hi 🫶

like, the entire rmap friend group showed up to the group chat 😭💀 every single one of them, we love a full roster 🍓

lowkey reminder: this is a sanity check bestie — it's not here to do the mapping, it's here to make sure the mapping makes sense. don't ask it to carry the whole rmap workload, that's not its main character arc 💅

and that's the page!! 🧚💖 this little slice of the Kernel API Manual comes from ./mm, dated October 2026, and it's literally the __page_check_anon_rmap(9) page, periodt. bye bestie, go check some rmap additions responsibly ✨🌸

📦 where this page comes from