handle_rsp_cntrl_info(9)

💅 handle_rsp_cntrl_info(9) — like, the Kernel API Manual bestie 🎀

Okay so real talk, this one lives in the 9 section of the Kernel API Manual, and it's giving "small function, big responsibilities" energy. Let's get into it ✨

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🌸 NAME 🌸

handle_rsp_cntrl_info — the little guy that handles the control information inside a response 🫶

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✨ SYNOPSIS ✨

void handle_rsp_cntrl_info (struct sge_qset *qs , u32 flags );

That's it. That's the whole signature. Void return, two args, no cap. 💅

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🦋 ARGUMENTS 🦋

• qs — the queue set that corresponds to the response 👑 like, whichever queue set this response belongs to, that's the one you hand over here.
• flags — the response control flags 🌈 literally just the control flags that came in with the response.

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💖 DESCRIPTION 💖

So what does it actually do? It handles the control information of an SGE response — think GTS indications and the completion credits for the queue set's Tx queues. Those are the two things it's dealing with, and yes it's a whole vibe. ⭐

And here's the part I need you to remember for the quiz, bestie: HW coalesces credits, we don't do any extra SW coalescing. 🫶 The hardware already did the merging; there is zero additional software coalescing happening in here. Not me writing a whole sentence about the coalescing we're not doing 😭 but fr fr it matters.

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🔥 SEE ALSO 🔥

Okay this list is long — it's giving main character energy of the entire sge.c file. All of these are kernel functions, and they all live next to each other in the Kernel file ./drivers/net/ethernet/chelsio/cxgb3/sge.c:

• refill_rspq(9)
• need_skb_unmap(9)
• unmap_skb(9)
• free_tx_desc(9)
• reclaim_completed_tx(9)
• should_restart_tx(9)
• free_rx_bufs(9)
• add_one_rx_buf(9)
• refill_fl(9)
• recycle_rx_buf(9)
• alloc_ring(9)
• t3_reset_qset(9)
• t3_free_qset(9)
• init_qset_cntxt(9)
• sgl_len(9)
• flits_to_desc(9)
• get_packet(9)
• get_packet_pg(9)
• get_imm_packet(9)
• calc_tx_descs(9)
• write_sgl(9)
• check_ring_tx_db(9)
• write_wr_hdr_sgl(9)
• write_tx_pkt_wr(9)
• t3_eth_xmit(9)
• write_imm(9)
• check_desc_avail(9)
• reclaim_completed_tx_imm(9)
• ctrl_xmit(9)
• restart_ctrlq(9)
• deferred_unmap_destructor(9)
• write_ofld_wr(9)
• calc_tx_descs_ofld(9)
• ofld_xmit(9)
• restart_offloadq(9)
• queue_set(9)
• is_ctrl_pkt(9)
• t3_offload_tx(9)
• offload_enqueue(9)
• deliver_partial_bundle(9)
• ofld_poll(9)
• rx_offload(9)
• restart_tx(9)
• cxgb3_arp_process(9)
• rx_eth(9)
• lro_add_page(9)
• check_ring_db(9)
• is_new_response(9)
• process_responses(9)
• napi_rx_handler(9)
• process_pure_responses(9)
• handle_responses(9)
• t3_intr_handler(9)
• t3_sge_err_intr_handler(9)
• sge_timer_tx(9)
• sge_timer_rx(9)
• t3_update_qset_coalesce(9)
• t3_sge_alloc_qset(9)
• t3_start_sge_timers(9)
• t3_stop_sge_timers(9)
• t3_free_sge_resources(9)
• t3_sge_start(9)
• t3_sge_stop_dma(9)
• t3_sge_stop(9)
• t3_sge_init(9)
• t3_sge_prep(9)

Like I said. Iconic. Ate. No crumbs. 👑

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💀 Also a warning-free page, which honestly? A relief. Read the functions, hydrate, and don't add software coalescing where there is none. Periodt.

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Sign-off time, bestie! 💜 This gorgeous little page comes to you from the source file ./drivers/net/ethernet/chelsio... (yes, it's truncated like that in the footer, we don't make the rules 🙈), dated October 2026, and it's out here answering to the name handle_rsp_cntrl_info(9). Go forth and handle that control info 🎀🧚🌸