kmsan_free_page(9)

📦 version 7.3.1, in nixpkgs unstable

💖 kmsan_free_page — like, the KMSAN heads-up for a free_pages() call

okay so this is kmsan_free_page, straight out of the Kernel API Manual (section 9, kernel-flavored, iykyk) — and bestie, it's a tiny little function with one very specific job and I'm obsessed with how unbothered it is 💅

✨ SYNOPSIS ✨

void kmsan_free_page (struct page *page , unsigned int order );

that's it. that's the whole signature. she's short, she's sweet, she returns void because she has nothing to say back to you 🎀

🌸 ARGUMENTS 🌸

  • page — a struct page pointer, and it's literally the exact same one that got passed to free_pages. no sneaky substitution, just hand her the same pointer, bestie 🫶
  • order — the order of the deallocated struct page. yes, the order. give her the number, she needs the number 🔥

🦋 DESCRIPTION 🦋

so here's the vibe: KMSAN marks freed memory as uninitialized. that's it. that's the whole personality 🌈

like, not me explaining it in one sentence 😭 — she's a notifier, she tells KMSAN "hey girl, this page just got freed," and KMSAN goes "say less" and marks that memory as uninitialized. main character energy, no cap ✨

👑 SEE ALSO 👑

the whole KMSAN friend group, fr fr — they all live in the kernel file ./include/linux/kmsan.h:

like, the entire group chat 💀 go read them, they ate 🍓

ngl the whole ./include/linux directory is where the lore lives — that's the source location, and this page is dated October 2026 ⭐

and that's the page, bestie — slay, periodt, go free some pages responsibly 🧚💜

📦 where this page comes from