cgroup_is_descendant(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cgroup_is_descendant(9)

okay so this is a page from the Kernel API Manual bestie, and it's about the function cgroup_is_descendant — literally the "are we related" vibe check for cgroups 🌸

✨ NAME ✨

cgroup_is_descendant — test ancestry 👑 (yes, we're doing a whole family tree moment)

✨ SYNOPSIS ✨

bool cgroup_is_descendant (struct cgroup *cgrp , struct cgroup *ancestor );

🎀 ARGUMENTS 🎀

  • cgrp — the cgroup to be tested. this is the one putting itself out there, like "hi am i in this family" 🙈
  • ancestor — possible ancestor of cgrp. the maybe-parent, the potential ancestor, the one we're checking against 💫

🦋 DESCRIPTION 🦋

so the whole thing: it tests whether cgrp is a descendant of ancestor. that's it, that's the function, and it ate 💅

and listen — it also returns true if cgrp == ancestor. so if you're checking yourself against yourself, you're your own ancestor, iconic behavior honestly. self-love fr fr 💖

ngl this function is safe to call as long as cgrp and ancestor are accessible. that's the whole caveat. keep them accessible and you're golden ✨

🌈 SEE ALSO 🌈

bestie there are SO many siblings, this function has main character energy with this many cross-references 😭

Kernel file ./include/linux/cgroup.h:

like every single one of those is linked, go read them, i'm obsessed 🫶

and that's the page!! it lives in ./include/linux (the section for these kernel API pages, iykyk) and it's dated October 2026 ⭐ so yeah, that's the whole thing, you understood it perfectly, slay 🧚💜

📦 where this page comes from