libeth_rx_p...ol_params_zc(9)

💅 libeth_rx_p...ol_params_zc(9) — like, the Kernel API Manual era 🎀

okay so bestie, buckle up, because this one is from the Kernel API Manual and it's genuinely kind of a baddie. it's all about calculating your params without that stack overhead dragging you down. no cap. ✨

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✨ NAME ✨

libeth_rx_page_pool_params_zc — calculate params without the stack overhead 🦋

like, it does the math so the stack doesn't have to. main character energy fr.

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🌸 SYNOPSIS 🌸

bool libeth_rx_page_pool_params_zc (struct libeth_fq *fq , struct page_pool_params *pp );

she takes two things and returns a bool. that's it. that's the vibe. 💅

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💖 ARGUMENTS 💖

• fq — the buffer queue we're calculating the size for 🎀 (yes, that queue)
• pp — the page_pool_params of the netdev, aka the netdev's page pool situation ✨

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🔥 DESCRIPTION 🔥

so what she actually does: she sets the PP params so they exclude the stack overhead, plus both the buffer length and the truesize — which, fun fact, are equal for the data buffers. iykyk. 🫶

⚠️ but listen — this requires separate header buffers to be always active and to account the overhead. not optional, babe. it's giving "non-negotiable".

and here's the slay: with MTU == PAGE_SIZE, this allows the kernel to enable the zerocopy mode. periodt. 👑

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🌈 RETURN 🌈

• true on success 💚
• false on invalid input params 💀 (vibe check failed, try again)

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/net/ethernet/intel/libeth/rx.c 📂
• libeth_rx_hw_len_mtu(9)
• libeth_rx_hw_len_truesize(9)
• libeth_rx_page_pool_params(9)
• libeth_rx_fq_create(9)
• libeth_rx_fq_destroy(9)
• libeth_rx_recycle_slow(9)
• libeth_rx_pt_gen_hash_type(9)

the whole friend group, honestly. go say hi. 🧚

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and that's the page, bestie!! 🍓 this little masterpiece lives at ./drivers/net/ethernet/intel/l..., dated October 2026, and it's filed under libeth_rx_p...ol_params_zc(9). mwah 💜✨