rdmacg_css_offline(9)

✨ rdmacg_css_offline(9) ✨

okay bestie, welcome to the Kernel API Manual page for rdmacg_css_offline — this is the group-chat rundown, but every fact is staying exactly where it belongs, periodt. 💅

🌸 NAME 🌸

rdmacg_css_offline — cgroup css_offline callback. literally the callback, no cap.

🦋 SYNOPSIS 🦋

void rdmacg_css_offline (struct cgroup_subsys_state *css );

🎀 ARGUMENTS 🎀

• css — css of interest. that’s the cgroup subsystem state we’re talking about, bestie.

💖 DESCRIPTION 💖

so this function gets called when css is about to go away 😭 and it’s responsible for shooting down all rdmacg associated with css. as part of that, it marks all the resource pool entries to max value, so that when resources are uncharged, the associated resource pool can be freed as well. that’s the whole cleanup vibe: make it so the pool can be freed too. ✨

👑 SEE ALSO 👑

the kernel file is ./kernel/cgroup/rdma.c, and it’s giving very much “go read these next”:

• uncharge_cg_locked(9)
• rdmacg_event_locked(9)
• rdmacg_uncharge_hierarchy(9)
• rdmacg_uncharge(9)
• rdmacg_try_charge(9)
• rdmacg_register_device(9)
• rdmacg_unregister_device(9)

mwah 💋 this cutie came from source/version ./kernel/cgroup and is dated October 2026 — slay, go forth and uncharge responsibly. 🫶