i40e_realloc_rx_xdp_bi(9)

💅 i40e_realloc_rx_xdp_bi — like, the manual page bestie 💅

okay so this is a page from the Kernel API Manual (yes, that manual, the big one) and it's all about i40e_realloc_rx_xdp_bi, a function that lives in the Intel i40e driver and has one very specific job. sit down, grab a strawberry drink 🍓, we're doing this.

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✨ NAME ✨

i40e_realloc_rx_xdp_bi — reallocate the SW ring for either XSK or normal buffer. that's it. that's the whole vibe. 🎀

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🦋 SYNOPSIS 🦋

int i40e_realloc_rx_xdp_bi (struct i40e_ring *rx_ring , bool pool_present );

so you hand it a ring and a bool, and it hands you back an int. classic. no cap.

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🌸 ARGUMENTS 🌸

• rx_ring — the current rx ring. like, the actual one you're working with right now, not some other one. 👑
• pool_present — is the pool for XSK present? that's literally the whole question this bool is asking. yes or no, bestie. true or false. don't overthink it. 💜

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🔥 DESCRIPTION 🔥

so what it does: it tries to allocate memory, and if that allocation fails, it returns ENOMEM. that's the "not me, I have no memory" moment 😭 and if the allocation was successful? slay. it substitutes the buffer with the allocated one. swapping in the new buffer like it's a glow-up. ✨

and the return values, so you're never confused:

• 0 on success — we love a clean exit 🫶
• negative on failure — it's giving "something went wrong" but at least it's honest 💀

no cap, that's the entire description. the allocation succeeds and the buffer gets swapped, or you get ENOMEM and a negative return. periodt.

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🌈 SEE ALSO 🌈

the kernel file where all this magic lives, fr fr:

./drivers/net/ethernet/intel/i40e/i40e_xsk.c

and the whole friend group 🧚 that keeps showing up in the same SEE ALSO section:

i40e_realloc_rx_bi_zc(9), i40e_xsk_pool_enable(9), i40e_xsk_pool_disable(9), i40e_xsk_pool_setup(9), i40e_run_xdp_zc(9), i40e_construct_skb_zc(9), i40e_clean_rx_irq_zc(9), i40e_xmit_zc(9), i40e_clean_xdp_tx_buffer(9), i40e_clean_xdp_tx_irq(9), i40e_xsk_wakeup(9), i40e_xsk_clean_tx_ring(9), i40e_xsk_any_rx_ring_enabled(9)

go read those too, they're iconic 💅

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and that's the page!! 🎀 this came out of ./drivers/net/ethernet/intel/i40e, dated October 2026, and the page itself is <rainbow>i40e_realloc_rx_xdp_bi(9)</rainbow> — remember it, cite it, love it. mwah 💖