iavf_xmit_descriptor_count(9)

💅 iavf_xmit_descriptor_count — ngl this one's a lil math girlie

okay so bestie, welcome to the Kernel API Manual page for iavf_xmit_descriptor_count ✨ she lives in the iavf driver, she counts things, and honestly? she's iconic for it.

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🌸 NAME 🌸

iavf_xmit_descriptor_count — literally calculates the number of Tx descriptors you need 🎀

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🦋 SYNOPSIS 🦋

int iavf_xmit_descriptor_count (struct sk_buff *skb );

that's it, that's the whole signature, no cap 💖

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🍓 ARGUMENTS 🍓

• skb — the send buffer 💌 (yes that's the whole description, she's a woman of few words)

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👑 DESCRIPTION 👑

so what she does is: she returns the number of data descriptors needed for this skb. simple. elegant. slay 💅

but wait, there's a plot twist 😭 — she returns 0 to indicate that there are not enough descriptors available in this ring, since we need at least one descriptor. so like, zero is not a number of descriptors here, it's a "girl we're out of room" flag. vibe check failed, try again later 🫶

lowkey important: 0 means no descriptors available, not zero descriptors needed. do not get that twisted bestie 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/intel/iavf/iavf_txrx.h — go read the header, iykyk 📖
• iavf_txd_use_count(9)
• iavf_maybe_stop_tx(9)
• iavf_chk_linearize(9)
• txring_txq(9)

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and that's the tea 🧚 this cutie page dropped October 2026, lives under ./drivers/net/ethernet/intel/iavf, and comes to you courtesy of the Kernel API Manual. mwah, go count some descriptors, ily 💜✨