try_offline_node(9)

💅 try_offline_node — Kernel API Manual ✨

okay so bestie, welcome to the try_offline_node(9) page 🫶 it's a lil kernel API moment, and honestly? she's short but she matters. let's get into it 💖

---

🌸 NAME 🌸

try_offline_node — (and yes the original literally leaves the description blank, no cap, not me making that up 😭 she's mysterious like that)

---

✨ SYNOPSIS ✨

void try_offline_node (int nid );

that's it. that's the whole signature. clean, simple, iconic 👑

---

🎀 ARGUMENTS 🎀

• nid — the node ID 💫 literally just which node we're talking about, that's the whole vibe check

---

🦋 DESCRIPTION 🦋

so what does she do? okay so listen: try_offline_node offlines a node — but only if all memory sections and cpus of the node are removed. both conditions, bestie. memory sections ✔️ cpus ✔️ then she'll offline that node for you. it's giving conditional queen energy 👑 if stuff's still hanging around on that node, she's simply not doing it, periodt 💅

---

⚠️ NOTE ⚠️

🚨 real talk, don't skip this one 🚨 the caller must call lock_device_hotplug to serialize hotplug and online/offline operations before this call. like, before-before. this is not a suggestion, it's the rule 🙈 skipping the lock is how you get chaotic race condition energy and nobody wants that 😭

---

⭐ SEE ALSO ⭐

kernel file ./mm/memory_hotplug.c 🗂️ and her besties:

• __remove_pages(9)
• __add_memory_driver_managed(9)
• add_memory_driver_managed(9)
• __remove_memory(9)
• offline_and_remove_memory_ranges(9)

go read them, iykyk 💜

---

and that's the page!! 🎀 written from the ./mm corner of the kernel, dated October 2026 ⭐ thanks for reading bestie, go call lock_device_hotplug first fr fr 💖✨🦋