uncharge_cg_locked(9)

✨ NAME ✨

okay so welcome to uncharge_cg_locked(9) from the Kernel API Manual, bestie 💖 this page is literally about how you uncharge a resource for the rdma cgroup — yes, it’s giving “put that resource back” energy, but make it kernel-level 🫶

🦋 SYNOPSIS 🦋

void uncharge_cg_locked (struct rdma_cgroup *cg , struct rdmacg_device
*device , enum rdmacg_resource_type index );

🎀 ARGUMENTS 🎀

• cg — pointer to the cg you’re uncharging, and all the parents in the hierarchy too — not just one lonely cg, bestie, the whole family tree gets handled 💅
• device — pointer to the rdmacg device, iconic ✨
• index — the index of the resource to uncharge in cg (aka the resource pool) 🎀

🌸 DESCRIPTION 🌸

so here’s the extra cleanup moment: it also frees the resource pool that was created as part of the charging operation — but only when there are no resources attached to the resource pool. literally “if it’s empty, free it” vibes 🧚‍♀️ no cap.

🔥 SEE ALSO 🔥

go give these pages some love too, bestie 🫶

• Kernel file ./kernel/cgroup/rdma.c — yes, the kernel file itself is listed here 👀
• rdmacg_event_locked(9)
• rdmacg_uncharge_hierarchy(9)
• rdmacg_uncharge(9)
• rdmacg_try_charge(9)
• rdmacg_register_device(9)
• rdmacg_unregister_device(9)
• rdmacg_css_offline(9)

k that’s the whole page, bestie 🫶 this manual lives in ./kernel/cgroup, dated October 2026, and it’s the uncharge_cg_locked(9) moment. periodt 💜✨