dummy_numa_init(9)

💖 dummy_numa_init(9) — the glow-up

okay bestie, so this is a page straight out of the Kernel API Manual, and it's about dummy_numa_init — literally the backup-bestie of NUMA setup. 🧚 Let's get into it.

---

✨ NAME ✨

dummy_numa_init — the fallback dummy NUMA init. Yes, "dummy" is its whole brand and it's serving anyway. 💅

---

🌸 SYNOPSIS 🌸

int dummy_numa_init (void );

---

🎀 ARGUMENTS 🎀

• void — no arguments, babe. it takes nothing. zero. nada. it's giving self-sufficient main character energy. 👑

---

🦋 DESCRIPTION 🦋

So here's the vibe: this function is the one that gets called when things aren't ~ideal~. Specifically, it's used if:

• there's no underlying NUMA architecture at all, or
• NUMA initialization fails on you 😭, or
• NUMA is disabled on the command line.

The way that it does its job: it must online at least one node (node 0) and add memory blocks that cover all allowed memory. Like, that's non-negotiable, that's the whole assignment. 📋✨

And honestly? It is unlikely that this function fails. Iconic behavior, no notes. 🫶

---

🔥 RETURN 🔥

• 0 — on success, slay 💯
• -errno — on failure, and yeah it's a negative errno, as is tradition 🌈

---

👑 SEE ALSO 👑

• Kernel file ./mm/arch_numa.c
• arch_numa_init(9) — the sibling, the real one, iykyk 💜

---

ngl, the whole thing lives under ./mm and that's the ~source of truth~. if you're poking around NUMA bring-up and this page shows up, you're probably in fallback territory. no cap. 🙈

---

⭐ that's the page!! catch you in the kernel source bestie — this one's from ./mm, dated October 2026, mwah 💋🎀