ss_rstat_init(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 ss_rstat_init 🌸

ok so this is a page from the Kernel API Manual and bestie, we're talking about ss_rstat_init — which is literally the function that does subsystem-specific rstat initialization. it's giving "small function, big responsibilities" energy fr fr 💅

✨ NAME ✨

ss_rstat_init — subsystem-specific rstat initialization 🎀

🦋 SYNOPSIS 🦋

int ss_rstat_init (struct cgroup_subsys *ss );

like, it returns an int (iconic), and it takes exactly one thing. no cap. ✨

💖 ARGUMENTS 💖

  • ss — the target subsystem 🫶 this is the thing you're pointing at. it's a struct cgroup_subsys *, and whether it's set or not changes literally everything about what this function does. main character energy honestly.

🔥 DESCRIPTION 🔥

okay so here's the vibe check, bestie, and it's a two-for-one:

  • if ss is NULL 😭 — then the static locks associated with the base stats get initialized.
  • if ss is non-NULL 👑 — then it's the subsystem-specific locks that get initialized instead.

so basically it's a little branching situation: null means base stats locks, not-null means that subsystem's locks. that's the whole thing. slay. 💅✨

⭐ ngl it's a short description but it ate — one argument, two behaviours, zero ambiguity. periodt.

🌈 SEE ALSO 🌈

go check out the kernel file ./kernel/cgroup/rstat.c for the full lore, plus these besties:

iykyk 🦋💜

ok bye bestie, that's the whole page!! 🍓 this one came out of ./kernel/cgroup and it's dated October 2026 — the ss_rstat_init(9) era, we love to see it 🧚💖

📦 where this page comes from