i40e_ptp_tx_hang(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 i40e_ptp_tx_hang — the kernel API manual, bestie edition ✨

okay so you know how man pages are usually a total snooze? not this one. this is i40e_ptp_tx_hang(9) from the Kernel API Manual, and honestly it's giving "tiny watchdog function with main character energy" 💅

✨ NAME ✨

i40e_ptp_tx_hang — catch the messy error case where the Tx timestamp register is straight-up hung 😭 like it just stopped responding, no cap

🦋 SYNOPSIS 🦋

void i40e_ptp_tx_hang (struct i40e_pf *pf );

that's it. that's the whole vibe. void return, one argument, slay 🫶

🎀 ARGUMENTS 🎀

  • pf — the PF private data structure 💖 literally the private-data-structure moment, she's the star of the show

🌈 DESCRIPTION 🌈

okay so bestie, here's the tea ☕ — this is a watchdog task, and she runs periodically to make sure we clear the Tx timestamp logic if we don't obtain a timestamp in a reasonable amount of time ⏰ she's just checking in. lowkey protective. highkey necessary.

now the important part: this situation is unexpected in the normal case 🙈 like normally it simply does not happen. but if it does occur? it results in permanently preventing timestamps of future packets 💀 yeah. permanent. forever. not a little glitch — a whole vibe-ruining, timestamp-blocking situation. so the watchdog exists so that never happens. periodt 🔥

ngl, "permanently preventing timestamps of future packets" is the scary sentence in this whole page. read it twice. she's not being dramatic, that's just what it says 😭

🧚 SEE ALSO 🧚

the kernel file she lives in 👑:

Kernel file ./drivers/net/ethernet/intel/i40e/i40e_ptp.c

and now, the full friend group 💜 every single one of these, in the exact order the original gave them:

(yes i40_ptp_reset_timing_events(9) really is spelled like that in the original — don't come for me, I copied it character for character 💅)

okay that's the whole page, you ate it up, go read i40e_ptp_rx_hang(9) next for the matching set 🎀

source + version: ./drivers/net/ethernet/intel/i40e · dated October 2026 · manual page i40e_ptp_tx_hang(9) — byeee bestie, mwah 💖✨🦋

📦 where this page comes from