css_rstat_updated_list(9)

🎀 NAME 🎀

okay so bestie, this is css_rstat_updated_list(9) from the Kernel API Manual — and its whole job is literally build a list of updated css's to be flushed 💅✨. That's the name and the vibe, no cap.

🌈 SYNOPSIS 🌈

struct cgroup_subsys_state * css_rstat_updated_list (struct
       cgroup_subsys_state *root , int cpu );

🦋 ARGUMENTS 🦋

• root — the root of the css subtree you're traversing 🌳👑
• cpu — the target cpu 🖥️✨

💖 RETURN 💖

A singly linked list of css's to be flushed 🫶 — that's the whole return, and it's giving exactly what it says.

🔥 DESCRIPTION 🔥

So the function walks the updated rstat_cpu tree on cpu from root 🌲💫. During that traversal, every returned css gets unlinked from the updated tree — like, it's removed as it comes back, okay? 😭

The only ordering guarantee is this: for a parent and a child pair covered by a given traversal, the child is before its parent in the list 👑➡️🧒. That's it. Don't go inventing more ordering promises, bestie 💀.

Also note: updated_children is self terminated and points to a list of child css's if not empty 🎀. Whereas updated_next is like a sibling link within the children list and is terminated by the parent css 🌸. One exception, because of course there's an exception: the css root, whose updated_next can be self terminated 👑✨.

🧚 SEE ALSO 🧚

• Kernel file ./kernel/cgroup/rstat.c __css_rstat_updated(9)
• css_rstat_push_children(9)
• css_rstat_flush(9)
• ss_rstat_init(9)

mwah 💋 that's the whole page, bestie — source ./kernel/cgroup, October 2026, and the manual name is css_rstat_updated_list(9). periodt. 🫶✨