hrtimer_start(9)

💅 hrtimer_start(9) — from the Kernel API Manual, bestie ✨

Okay so picture this: it's the Kernel API Manual, section 9, and the star of the show is hrtimer_start. Buckle up, we're doing timers today 🎀

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🌸 NAME 🌸

hrtimer_start — (re)start an hrtimer. That's it, that's the whole vibe. You're either starting it or restarting it, and honestly? main character energy either way 👑

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✨ SYNOPSIS ✨

void hrtimer_start (struct hrtimer *timer , ktime_t tim , const enum
       hrtimer_mode mode );

Three args, returns void, zero drama. Slay 🫶

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💖 ARGUMENTS 💖

• timer — the timer to be added. Like, this is your timer, the one you're putting in. Not me being cryptic, it literally is the timer being added 😌
• tim — the expiry time. When it goes off. The moment. The deadline. The "you have to be there by" of it all ⏰
• mode — the timer mode, and this one's giving options, so let's break it down:
  • absolute — HRTIMER_MODE_ABS 🎯
  • relative — HRTIMER_MODE_REL 🌀
  • pinned — HRTIMER_MODE_PINNED 📌
  • and heads up, the softirq based mode is considered for debug purpose only! Not me making the rules, that's literally the rule 💀

ngl bestie, mode is lowkey the spicy argument here. Read it properly, okay? 🙈

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🦋 SEE ALSO 🦋

Kernel file ./include/linux/hrtimer.h, plus these iconic little functions you should absolutely go say hi to:

• struct hrtimer_sleeper(9)
• hrtimer_get_remaining(9)
• hrtimer_is_queued(9)
• hrtimer_forward_now(9)

iykyk — that header file is where all the hrtimer lore lives 🧚

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and that's the page!! 💜 This little masterpiece comes to you from ./include/linux, dated October 2026, filed under hrtimer_start(9) — go forth and restart those timers, bestie, you've got this 🍓🌸✨