css_rstat_flush(9)

💅 css_rstat_flush(9) — Kernel API Manual

hey bestie, welcome to the css_rstat_flush(9) page — this is the Kernel API Manual moment where we make cgroup stats behave ✨

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🌸 NAME 🌸

css_rstat_flush — flush stats in @css's rstat subtree 💖

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✨ SYNOPSIS ✨

__bpf_kfunc void css_rstat_flush (struct cgroup_subsys_state *css );

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🎀 ARGUMENTS 🎀

• css — target cgroup subsystem state. that's the thing we're flushing, bestie 🫶

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💅 DESCRIPTION 💅

okay so this function is literally the stats glow-up ✨ It collects all per-cpu stats in css's subtree into the global counters and propagates them upwards. After this function returns, all rstat nodes in the subtree have up-to-date ->stat. no cap 💯

it also gets all rstat nodes in the subtree — including css — off the ->updated_children lists. cleaning up the group chat, basically 🧹💬

heads up bestie: this function may block 😴 so don't act surprised when it does.

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🦋 SEE ALSO 🦋

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

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mwah 💋 this page is sourced from ./kernel/cgroup, dated October 2026, and it's the css_rstat_flush(9) manual page — periodt 👑💖