get_mem_cgroup_from_mm(9)

📦 version 7.3.1, in nixpkgs unstable

💖 get_mem_cgroup_from_mm — Kernel API Manual ✨

okay so bestie, welcome to the get_mem_cgroup_from_mm(9) page from the Kernel API Manual — this is the one that gets you a reference on a given mm_struct's memcg, and she's lowkey iconic for it 🎀

🦋 NAME

get_mem_cgroup_from_mm — Obtain a reference on given mm_struct's memcg. that's it, that's the whole vibe 💅

🌸 SYNOPSIS

struct mem_cgroup * get_mem_cgroup_from_mm (struct mm_struct *mm );

literally just hand her an mm and she hands you back a struct mem_cgroup *, no cap ✨

🎀 ARGUMENTS

  • mm — the mm from which the memcg should be extracted. and yes, queen, it can be NULL — she's flexible like that 🙈

💜 DESCRIPTION

So here's the tea ☕: she obtains a reference on mm->memcg and returns it if it's successful. simple, clean, slay.

But if mm is NULL, bestie, the memcg gets chosen like this — in order, no skipping:

  1. The active memcg, if set. 👑
  2. current->mm->memcg, if available.
  3. root memcg — the fallback queen of the whole situation 🌈
⚠️ also important: if mem_cgroup is disabled, NULL is returned. not a vibe, but it's the rule, fr fr 💀

🫶 SEE ALSO

Kernel file ./mm/memcontrol.c — and the whole extended friend group, in order:

okay that's the whole page, mwah 💋 this little beauty lives under ./mm, dated October 2026, and she's served up fresh from the Kernel API Manual — go forth and reference your memcgs responsibly, bestie 🧚💖

📦 where this page comes from