tick_nohz_get_sleep_length(9)

💤 tick_nohz_get_sleep_length 💤

okay bestie, welcome to the Kernel API Manual ✨ we're talking about tick_nohz_get_sleep_length, and it's literally all about how long your current sleep is expected to last. no cap.

---

🌸 NAME 🌸

tick_nohz_get_sleep_length — return the expected length of the current sleep 🛌💖

---

🎀 SYNOPSIS 🎀

ktime_t tick_nohz_get_sleep_length (ktime_t *delta_next );

---

🦋 ARGUMENTS 🦋

• delta_next — the duration until the next event if the tick cannot be stopped ⏰. that's the whole vibe of this parameter.

---

🌈 DESCRIPTION 🌈

so this one is called from power state control code with interrupts disabled 🫶. that's important, bestie — keep that in mind.

the return value of this function and/or the value returned by it through the delta_next pointer can be negative, and callers absolutely must take that into account 😭💀. like, do not ignore the negative possibility. the kernel is not playing.

---

⭐ RETURN ⭐

the expected length of the current sleep 💤👑

---

💅 SEE ALSO 💅

• Kernel file ./kernel/time/tick-sched.c
• tick_nohz_update_jiffies(9)
• tick_nohz_next_event(9)
• tick_nohz_idle_stop_tick(9)
• tick_nohz_idle_enter(9)
• tick_nohz_irq_exit(9)
• tick_nohz_idle_got_tick(9)
• tick_nohz_get_next_hrtimer(9)
• tick_nohz_get_idle_calls_cpu(9)
• tick_nohz_idle_exit(9)
• tick_nohz_switch_to_nohz(9)
• tick_setup_sched_timer(9)

bestie reminder: those negative values are real, and callers need to handle them. no skipping that part 🙈✨

---

mwah 💋 this lil page comes from ./kernel/time, dated October 2026, and it's all about tick_nohz_get_sleep_length(9) — bye bestie! 🫶💖