manage_rcvq(9)

manage_rcvq(9) — Kernel API Manual but make it make sense 🌸

🎀 NAME 🎀

manage_rcvq - manage a context's receive queue. That's the whole assignment, bestie. 💅

✨ SYNOPSIS ✨

int manage_rcvq (struct hfi1_ctxtdata *uctxt , u16 subctxt , unsigned
       long arg );

💅 ARGUMENTS 💅

• uctxt — the context. Like, the actual context you're managing.
• subctxt — the sub-context. The little side-quest context.
• arg — start/stop action to carry out. This is the instruction that tells it what to do.

🦋 DESCRIPTION 🦋

Okay so here's the tea: start_stop == 0 disables receive on the context, for use in queue overflow conditions. Then start_stop==1 re-enables it, and that's the one you use to re-init the software copy of the head register. Very demure, very mindful, very receive-queue management. 💖

🔥 SEE ALSO 🔥

Kernel file ./drivers/infiniband/hw/hfi1/file_ops.c is the main character, and you also gotta peek at:

• complete_subctxt(9)
• match_ctxt(9)
• find_sub_ctxt(9)
• user_exp_rcv_setup(9)
• user_exp_rcv_clear(9)
• user_exp_rcv_invalid(9)
• ctxt_reset(9)

💖 Source/version ./drivers/infiniband/hw/hfi1, dated October 2026 — manage_rcvq(9) signing off, periodt. 🫶💅