iavf_detect_recover_hung(9)

💖 iavf_detect_recover_hung(9) 💖

okay so this is a page from the Kernel API Manual (the iavf_detect_recover_hung(9) one, yes the whole name, we're not shortening it 🫶) and honestly it's giving "small function, big job" energy. let's get into it.

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✨ NAME ✨

iavf_detect_recover_hung — the function that detects hung queues and recovers them. yes bestie, both. it does the whole arc in one call 💅

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🌸 SYNOPSIS 🌸

void iavf_detect_recover_hung (struct iavf_vsi *vsi );

that's it. that's the whole signature. it returns void, so like… it doesn't return a status, it just does things. no cap.

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🎀 ARGUMENTS 🎀

• vsi — a pointer to the struct iavf_vsi that has the tx queues in it. that's the one thing you hand it. one (1) pointer. that's the whole vibe check 🔥

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🦋 DESCRIPTION 🦋

okay so picture this: the VSI has a netdev, and that netdev has TX queues. chain of custody, very main character.

what this function does is walk through each of those TX queues and check whether they're hung. and if it finds one that's hung? it triggers recovery by issuing a SW interrupt. literally "wake up bestie, you're being rescued" ⭐

so the flow is basically: check every TX queue → spot the hung one(s) → fire off the SW interrupt → recovery mode activated. and it does this for each queue, not just the first one it trips over. thorough queen behavior 👑

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🌈 SEE ALSO 🌈

first up, the kernel file this lives in:

./drivers/net/ethernet/intel/iavf/iavf_txrx.c

and then the whole extended friend group (yes, it's a long list, grab a snack 🍓):

• iavf_is_descriptor_done(9)
• iavf_unmap_and_free_tx_resource(9)
• iavf_clean_tx_ring(9)
• iavf_free_tx_resources(9)
• iavf_get_tx_pending(9)
• iavf_force_wb(9)
• iavf_clean_tx_irq(9)
• iavf_enable_wb_on_itr(9)
• iavf_update_itr(9)
• iavf_setup_tx_descriptors(9)
• iavf_clean_rx_ring(9)
• iavf_free_rx_resources(9)
• iavf_setup_rx_descriptors(9)
• iavf_release_rx_desc(9)
• iavf_receive_skb(9)
• iavf_alloc_rx_buffers(9)
• iavf_rx_csum(9)
• iavf_legacy_rx_csum(9)
• iavf_flex_rx_csum(9)
• iavf_legacy_rx_hash(9)
• iavf_flex_rx_hash(9)
• iavf_flex_rx_tstamp(9)
• iavf_process_skb_fields(9)
• iavf_cleanup_headers(9)
• iavf_add_rx_frag(9)
• iavf_build_skb(9)
• iavf_is_non_eop(9)
• iavf_extract_legacy_rx_fields(9)
• iavf_extract_flex_rx_fields(9)
• iavf_clean_rx_irq(9)
• iavf_update_enable_itr(9)
• iavf_napi_poll(9)
• iavf_tx_prepare_vlan_flags(9)
• iavf_tso(9)
• iavf_tx_enable_csum(9)
• iavf_create_tx_ctx(9)
• __iavf_chk_linearize(9)
• __iavf_maybe_stop_tx(9)
• iavf_tx_map(9)
• iavf_xmit_frame_ring(9)
• iavf_xmit_frame(9)

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lowkey if you're reading this page you probably got here from one of the tx functions above. hi. welcome. ily. 🫶

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so yeah, that's the whole page! this one lives in ./drivers/net/ethernet/intel/iavf, dated October 2026, and it's iavf_detect_recover_hung(9) — detect the hung, recover the hung, log off 💜💖✨