edac_mc_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 edac_mc_alloc(9) 🎀

okay so bestie, welcome to the Kernel API Manual page for edac_mc_alloc — she's a function, she's iconic, she allocates and partially fills a struct &mem_ctl_info, and honestly? she eats. 💅

✨ NAME ✨

edac_mc_alloc — Allocate and partially fill a struct &mem_ctl_info. 🫶

🌸 SYNOPSIS 🌸

struct mem_ctl_info * edac_mc_alloc (unsigned int mc_num , unsigned int
       n_layers , struct edac_mc_layer *layers , unsigned int sz_pvt );

like literally that's the whole signature, no cap 💖

🦋 ARGUMENTS 🦋

  • mc_num — Memory controller number. that's the number, bestie 🔢
  • n_layers — Number of MC hierarchy layers. how many layers we're layering 🌈
  • layers — Describes each layer as seen by the Memory Controller. it's giving the blueprint 🎀
  • sz_pvt — size of private storage needed. your own lil private stash ✨

💜 DESCRIPTION 💜

okay so the vibes here are efficiency. Everything is kmalloc'ed as one big chunk — more efficient. one big chunk, one big slay. 🔥

but ⚠️ Only can be used if all structures have the same lifetime — otherwise you have to allocate and initialize your own structures. fr fr, same lifetime or it's DIY time 😭

Use edac_mc_free to free mc structures allocated by this function. she giveth, and she taketh away 🧚

💀 NOTE: 💀

drivers handle multi-rank memories in different ways: in some drivers, one multi-rank memory stick is mapped as one entry, while, in others, a single multi-rank memory stick would be mapped into several entries. currently, this function will allocate multiple struct dimm_info on such scenarios, as grouping the multiple ranks require drivers change. iykyk 🤷‍♀️

⭐ RETURN ⭐

On success, return a pointer to struct mem_ctl_info pointer; NULL otherwise. we love a pointer that either works or doesn't 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/edac/edac_mc.h and her whole friend group:

go read them, they're all main character energy 👑

and that's the page bestie!! 💖✨ this one comes from ./drivers/edac, dated October 2026, and yes she's officially edac_mc_alloc(9) — stan her, memorize her, periodt 🎀🦋💜

📦 where this page comes from