hrtimer_start_range_ns(9)

✨ hrtimer_start_range_ns(9) ✨

Okay bestie, welcome to the Kernel API Manual page for hrtimer_start_range_ns(9) — the function that literally (re)starts an hrtimer and gives your kernel code main character energy. This is group-chat for timers: you set when it should go off, add some slack, and pick a mode. Slay. 💅

🌸 NAME 🌸

hrtimer_start_range_ns — (re)start an hrtimer. Periodt.

🎀 SYNOPSIS 🎀

void hrtimer_start_range_ns (struct hrtimer *timer , ktime_t tim , u64 delta_ns , const enum hrtimer_mode mode );

🦋 ARGUMENTS 🦋

• timer — the timer to be added. Like, the actual timer object you're putting on the schedule. It's the main character.
• tim — expiry time. When you want this whole thing to pop off.
• delta_ns — the "slack" range for the timer. Yes bestie, it's literally called slack — gives the timer some wiggle room. 🫶
• mode — timer mode: absolute (HRTIMER_MODE_ABS) or relative (HRTIMER_MODE_REL), and pinned (HRTIMER_MODE_PINNED); softirq based mode is considered for debug purpose only! ⚠️ (so don't come for me if you use that in prod, iykyk)

🌈 SEE ALSO 🌈

Kernel file ./kernel/time/hrtimer.c and these iconic besties:

• hrtimer_update_function(9)
• hrtimer_forward(9)
• hrtimer_start_range_ns_user(9)
• hrtimer_try_to_cancel(9)
• hrtimer_cancel(9)
• __hrtimer_get_remaining(9)
• hrtimer_get_next_event(9)
• hrtimer_next_event_without(9)
• hrtimer_setup(9)
• hrtimer_setup_on_stack(9)
• hrtimer_sleeper_start_expires(9)
• hrtimer_setup_sleeper_on_stack(9)

And that's the whole vibe check, bestie! 💖 This page lives in the ./kernel/time manual, dated October 2026, and the version tag is hrtimer_start_range_ns(9) — no cap, go schedule something iconic. 🎀✨