ktime_get_tai_fast_ns(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

okay so bestie, welcome to ktime_get_tai_fast_ns — this page lives in the Kernel API Manual (section 9), and it's giving “NMI safe and fast access to tai clock” ✨ like that's literally the whole name-and-purpose combo.

It's ktime_get_tai_fast_ns — NMI safe and fast access to tai clock. periodt 💅

✨ SYNOPSIS ✨

u64 notrace ktime_get_tai_fast_ns (void );

🎀 ARGUMENTS 🎀

  • void — no arguments. literally none, bestie, it said what it said 🫶

🦋 DESCRIPTION 🦋

so here's the tea: the same limitations as described for ktime_get_boot_fast_ns apply here too. you know how it is 😭

the mono time and the TAI offset are not read atomically, which may yield wrong readouts 💀 not me finding out the vibes are slightly out of sync.

⚠️ caveat bestie: the mono time and the TAI offset are not read atomically, so the readouts may be wrong. do not pretend this is atomic — it is not. 🙈

however — and this is the slay part — an update of the TAI offset is a rare event, e.g., caused by settime or adjtimex with an offset. so it's not happening every five seconds, thank goodness 🌸

the user of this function has to deal with the possibility of wrong timestamps in post processing. no cap, that's on you to handle in post processing 🫡

🌸 SEE ALSO 🌸

like, go read these too, iykyk 💖

okay that's the page, bestie 🫶 source/version: ./kernel/time • date: October 2026 • page: ktime_get_tai_fast_ns(9) 🌈💅

📦 where this page comes from