cgroup_save_control(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 cgroup_save_control 🎀

okay so real talk — this is a page from the Kernel API Manual, and bestie, it's short but it matters. Sit down, hydrate, let's get into it 💖

✨ NAME ✨

cgroup_save_control — save control masks and dom_cgrp of a subtree

like, it's literally a save button for a whole subtree's control state, no cap 🫶

🌸 SYNOPSIS 🌸

void cgroup_save_control (struct cgroup *cgrp );

that's it. that's the whole vibe. one argument, returns nothing (void), iconic 💅

🦋 ARGUMENTS 🦋

  • cgrp — root of the target subtree. this is your main character — the whole subtree that gets saved hangs off of it 👑

🧚 DESCRIPTION 🧚

okay so here's the tea ☕ — this function saves three things:

  • ->subtree_control
  • ->subtree_ss_mask
  • ->dom_cgrp

and where does it put them? into the respective old_ prefixed fields, obviously. so like, old_-something for each one. it's giving "before photo" energy 📸

and the scope, bestie, listen: it does this for cgrp's subtree including cgrp itself. not just the kids — the root gets saved too. the whole family. periodt 💀

no return value, no errors, no drama. it just saves and dips ✌️

🔥 SEE ALSO 🔥

the kernel file it lives in: ./kernel/cgroup/cgroup.c — go read it, iykyk 📖

and here's the full friend group, literally all of them, in order, no one left out 💜

okay that's the whole page, you ate that 💅✨

and for the sign-off bestie 🫶 — this gorgeous little page comes from the source ./kernel/cgroup, dated October 2026, and it's page cgroup_save_control(9) of the Kernel API Manual. go save some subtrees, ily, bye 👋💖

📦 where this page comes from