rdmacg_register_device(9)

💅 rdmacg_register_device 💅

okay so bestie, welcome to the Kernel API Manual — today's main character is rdmacg_register_device. yes it's a long name, yes it eats, and yes you're gonna understand it. periodt. ✨

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🎀 NAME 🎀

rdmacg_register_device — the function that registers an rdmacg device to the rdma controller. that's literally it, she's an introducer. 🫶

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🌸 SYNOPSIS 🌸

void rdmacg_register_device (struct rdmacg_device *device );

returns nothing (it's void, she gives no feedback, she just does the thing 💀). no cap.

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🦋 ARGUMENTS 🦋

• device — a pointer to the rdmacg device whose resources need to be accounted. like, this is the device you're signing up for the accounting system, and it's a struct rdmacg_device *. iykyk. 🎀

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✨ DESCRIPTION ✨

so here's the vibe check: if the IB stack wants a device to participate in rdma cgroup resource tracking, it must invoke this API to register with the rdma cgroup before any user space application can start using the RDMA resources. like, before. not during, not after, before. the order is the whole point, bestie — skip it and things go sideways. 😭

to be so fr fr: this is the "hi hello, i'd like to be tracked please" step. no registration, no accounting. simple as that. 🔥

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👑 SEE ALSO 👑

• Kernel file ./kernel/cgroup/rdma.c
• uncharge_cg_locked(9)
• rdmacg_event_locked(9)
• rdmacg_uncharge_hierarchy(9)
• rdmacg_uncharge(9)
• rdmacg_try_charge(9)
• rdmacg_unregister_device(9) ← the breakup arc 💔
• rdmacg_css_offline(9)

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and that's the whole page, you ate that 💅✨

love u, go read the other ones too — this cutie lives in ./kernel/cgroup and the version vibes say October 2026, filed under rdmacg_register_device(9). mwah 🍓🧚💜