hfi1_setup_eagerbufs(9)

💅 hfi1_setup_eagerbufs(9) 💅

okay bestie, welcome to the Kernel API Manual — this one's all about hfi1_setup_eagerbufs, and honestly? it's a whole vibe ✨

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🌸 NAME 🌸

hfi1_setup_eagerbufs — allocate eager buffers, both kernel and user contexts 🎀

✨ SYNOPSIS ✨

int hfi1_setup_eagerbufs (struct hfi1_ctxtdata *rcd );

🫶 ARGUMENTS 🫶

• rcd — the context we are setting up, aka the main character of this whole operation 💖

🔥 DESCRIPTION 🔥

so what it does is: allocate the eager TID buffers and program them into hip. no cap, that's the job 💅

and here's the tea — they are no longer completely contiguous, so instead we do multiple allocation calls. the way that matters is: otherwise we get the OOM code involved 😭 by asking for too much per call, which gives you disastrous results on some kernels. so yeah. don't do that. multiple small asks, iconic behavior, periodt 👑

bestie note: the non-contiguous thing isn't a bug, it's the whole point — one big ask = OOM drama, and nobody wants that on their kernel 🙈

🦋 SEE ALSO 🦋

Kernel file ./drivers/infiniband/hw/hfi1/init.c, plus the whole friend group 💜

• hfi1_rcd_free(9)
• hfi1_rcd_put(9)
• hfi1_rcd_get(9)
• allocate_rcd_index(9)
• hfi1_rcd_get_by_index_safe(9)
• hfi1_rcd_get_by_index(9)
• hfi1_free_ctxt(9)
• init_after_reset(9)
• create_workqueues(9)
• destroy_workqueues(9)
• enable_general_intr(9)
• hfi1_init(9)
• shutdown_device(9)
• hfi1_free_ctxtdata(9)
• hfi1_free_devdata(9)
• hfi1_alloc_devdata(9)
• hfi1_create_rcvhdrq(9)

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alright that's the whole page, ily, go read the other ones too 🌈⭐

source + version + date check: this one's from ./drivers/infiniband/hw/hfi1, dated October 2026 — mwah, bye bestie 💋🎀