tid_rdma_fin...ys_blocks_8k(9)

💅 tid_rdma_fin...ys_blocks_8k(9) — bestie edition

okay so this is a page straight out of the Kernel API Manual and honestly? it's a little niche but it eats. we're talking InfiniBand, we're talking TID RDMA, we're talking putting pages into 8k-shaped lil groups. stay with me 🫶

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✨ NAME ✨

tid_rdma_find_phys_blocks_8k — get groups base on mr info

(that's the original wording, no cap — "get groups base on mr info". iconic grammar, we respect it 💅)

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🌸 SYNOPSIS 🌸

u32 tid_rdma_find_phys_blocks_8k (struct tid_rdma_flow *flow , struct
       page **pages , u32 npages , struct tid_rdma_pageset *list );

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🎀 ARGUMENTS 🎀

• flow — the overall info for a TID RDMA segment. it's the whole vibe check for the segment, basically.
• pages — a pointer to an array of page structs. yes, pointer to an array, she's fancy like that.
• npages — the number of pages. how many we got? this many.
• list — the page set array to return. this is the output, the main character of the whole function ngl.

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🦋 DESCRIPTION 🦋

so what does this routine do? it parses an array of pages and computes pagesets in an 8k compatible way. periodt. ✨

the way it works: pages get tested two at a time — that's i, i + 1 for contiguous pages, and i - 1 and i contiguous pages. lowkey thorough 💖

if any condition is false, any accumulated pages get flushed, and v0, v1 are emitted as separate PAGE_SIZE pagesets. that's the dramatic exit.

otherwise? the current 8k is totaled for a future flush. saving it for later, iykyk 🌈

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🔥 RETURN 🔥

the number of pagesets list set with the returned number of pagesets. slay 💀 (fr fr, that's the sentence, keep it close to your heart)

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👑 SEE ALSO 👑

the kernel file is at ./drivers/infiniband/hw/hfi1/tid_rdma.c — go say hi 🫶 and then there's the whole friend group:

• 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)
• __trigger_tid_waiter(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)
• 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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💡 tiny note bestie: this whole page lives in ./drivers/infiniband/hw/hfi1 and it's dated October 2026 — yes, the future. she's ahead of her time 🧚

anyway that's the function, mwah, go read the 4k sibling next 💜