absent_pages_in_range(9)

✨ absent_pages_in_range(9) ✨

okay bestie, so this is a page from the Kernel API Manual and honestly? it's a little sleeper hit. it lives in absent_pages_in_range(9) and it's about counting the holes. the empty spots. the missing page frames. the void, basically. 🕳️👀

---

💖 NAME 💖

absent_pages_in_range — literally just returns the number of page frames chillin' inside the holes within a range. that's it. that's the whole gig. 💅

---

🌸 SYNOPSIS 🌸

unsigned long absent_pages_in_range (unsigned long start_pfn , unsigned long end_pfn );

so you hand it two unsigned long PFNs and it hands you back an unsigned long. no cap. very unsigned long core of it. 🫶

---

🎀 ARGUMENTS 🎀

• start_pfn — the start PFN, aka where you begin searching for holes. your starting line. your opening scene. 🌅
• end_pfn — the end PFN, aka where you stop searching for holes. the search wraps up here, bestie. 🏁

---

🦋 RETURN 🦋

it gives you back the number of pages frames in memory holes within a range. yes, "pages frames." that's what the original says, and we do not correct the icon. periodt. 😌✨

---

⭐ SEE ALSO ⭐

• Kernel file ./mm/mm_init.c — yes, the actual file, we're shouting it out 👑
• get_pfn_range_for_nid(9)
• free_area_init(9)
• node_map_pfn_alignment(9)

go read those next, iykyk. 🔥

---

heads up bestie: ./mm is where this page calls home, so that's the directory to keep in your brain. 🧠💜

---

that's a wrap, bestie 💖 this page came straight outta ./mm and it's dated October 2026 — so yes, it's from the future, and yes, it still ate. 🎀🦋💅