__trigger_tid_waiter(9)

✨ __trigger_tid_waiter ✨

okay so this is a page from the Kernel API Manual, and honestly? it's a little one but she's important 💅 like, tiny function, big main character energy, and she lives rent-free in the infiniband/hfi1 corner of the kernel 🌸

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🎀 NAME 🎀

__trigger_tid_waiter — trigger tid waiter, bestie. that's the whole job description, no notes 🫶

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🦋 SYNOPSIS 🦋

void __trigger_tid_waiter (struct rvt_qp *qp );

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🌈 ARGUMENTS 🌈

• qp — the qp. that's it, that's the argument 😭 it's the qp, the one and only, the main character of this function's whole life.

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💖 DESCRIPTION 💖

so this one is a private entrance — like, not the front door, not the guest list entrance, the private one, iykyk 🙈 — and what it does is schedule the qp.

💀 heads up, bestie: it only works assuming the caller is holding the qp->s_lock. so fr fr, lock first, then come through. no sneaking in without the lock, that's the entire vibe check of this function. 👑

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⭐ SEE ALSO ⭐

the lore is deep and the girls are all connected 🌸 here's the whole friend group:

• the kernel file ./drivers/infiniband/hw/hfi1/tid_rdma.c
• TID RDMA READ protocol(9)
• qp_to_rcd(9)
• lock ordering(9)
• kernel_tid_waiters(9)
• dequeue_tid_waiter(9)
• queue_qp_for_tid_wait(9)
• tid_rdma_schedule_tid_wakeup(9)
• tid_rdma_trigger_resume(9)
• kern_reserve_flow(9)
• tid_rdma_find_phys_blocks_4k(9)
• tid_flush_pages(9)
• tid_rdma_find_phys_blocks_8k(9)
• hfi1_kern_exp_rcv_setup(9)
• hfi1_kern_exp_rcv_free_flows(9)
• __trdma_clean_swqe(9)
• hfi1_schedule_tid_send(9)

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and that's the page, babe 🍓 dropping the credits so you know where she's from: this one comes out of ./drivers/infiniband/hw/hfi1, dated October 2026 — iconic, timeless, slay 🧚‍♀️💜