cpuidle_use_deepest_state(9)

📦 version 7.3.1, in nixpkgs unstable

💤 cpuidle_use_deepest_state — the governor override glow-up

okay so bestie, welcome to section 9 of the Kernel API Manual 🎀 — this is cpuidle_use_deepest_state, and it's literally the "let my CPU nap HARD" switch. no cap.

✨ SYNOPSIS ✨

void cpuidle_use_deepest_state (u64 latency_limit_ns );

that's it. one function, one argument, zero drama. 💅

🌸 ARGUMENTS 🌸

  • latency_limit_ns — the idle state exit latency limit, in nanoseconds ⏱️. and if you pass 0? that means no override, bestie — the governors get to keep doing their thing. 🫶

💖 DESCRIPTION 💖

here's the tea ☕:

if latency_limit_ns is nonzero, this sets the current CPU to use the deepest idle state whose exit latency is within latency_limit_ns — and yeah, that overrides the governors going forward 🔥 (main character energy, honestly).

if latency_limit_ns is zero, it does not override the governors. nope. governors stay in charge. 👑

fr fr, it's just a set/unset of governor override mode — nothing sneaky happening in the background 💀

🦋 SEE ALSO 🦋

the kernel file lives at ./drivers/cpuidle/cpuidle.c — go snoop if you're nosy (respectfully) 🙈

and these absolute icons in the cpuidle family iykyk:

the whole squad, assembled. periodt. 🌈

that's the whole page, bestie — go let your CPU have the deepest, most luxurious nap it's allowed to take 🧚💜

— sig ✨ source: ./drivers/cpuidle, dated October 2026, kernel api manual vibes only, no notes 💅

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