fm10k_mbx_update_max_size(9)

📦 version 7.3.1, in nixpkgs unstable

💌 fm10k_mbx_update_max_size(9) — the glow-up edition

okay so bestie, welcome to the Kernel API Manual ✨ — yes THE Kernel API Manual, the one and only. today we're talking about fm10k_mbx_update_max_size, and honestly? it's giving quiet-but-important. it's not the flashiest function at the mailbox party but it absolutely carries the whole vibe check 🫶

🌸 NAME 🌸

fm10k_mbx_update_max_size — updates the max_size and drops any large messages 💅 (yes, it's a glow-up and a purge, we love a multi-hyphenate)

✨ SYNOPSIS ✨

void fm10k_mbx_update_max_size (struct fm10k_mbx_info *mbx , u16 size );

like, it returns void. it doesn't owe you a return value. periodt. 👑

🎀 ARGUMENTS 🎀

  • mbx — pointer to mailbox. your main character struct, the one doing all the work fr fr 💖
  • size — new value for max_size 🦋 the new ceiling, the new limit, the new "you shall not pass" for message size

🌈 DESCRIPTION 🌈

okay so here's the whole situation: this function updates the max_size value, and then it drops any outgoing messages sitting at the head of the Tx FIFO if they're larger than max_size. 👋 bye bestie, you're too big, you gotta go.

and here's the part that's lowkey important to get right — it does NOT drop all the messages. and why not? because that would be "too difficult to parse and remove them from the FIFO." like, genuinely too hard, no cap, the code said what it said 💀 so instead, it relies on the checking to make sure that messages larger than max_size aren't pushed into the memory buffer in the first place. preventative vibes only ✨ the bouncer at the door, not the cleanup crew.

🫶 tiny recap so it sticks: head of Tx FIFO + bigger than max_size = dropped. everything else = untouched. and the real hero is the check that stops oversized messages from ever getting into the buffer.

🦋 SEE ALSO 🦋

the kernel file, obviously, our sacred text:

./drivers/net/ethernet/intel/fm10k/fm10k_mbx.c

and now the extended universe, iykyk — every single one of these icons, no skips, no shuffle, we respect the whole discography 👑:

like, that's the whole friend group and every single one made the group photo 📸💜

and that's the page bestie!! 💅 this lil baddie of a manpage came from ./drivers/net/ethernet/intel/f... and is dated October 2026 — so yeah, it's from the future and it still ate. mwah, go drop some oversized messages, ily 🎀✨🦋

📦 where this page comes from