wake_q_add(9)

📦 version 7.3.1, in nixpkgs unstable

💖 wake_q_add(9) — or, "girl help I'm queuing a wakeup" 💖

okay so you're in the Kernel API Manual (yes that's the manual name, we're fancy here 👑) and you've stumbled onto wake_q_add(9). bestie, sit down, this one is short and sweet and also has a little gotcha that we WILL be discussing. 🫶

✨ NAME ✨

wake_q_add — queue a wakeup for 'later' waking.

like, a rain check for waking a task up. 💅

🌸 SYNOPSIS 🌸

void wake_q_add (struct wake_q_head *head , struct task_struct *task );

that's it. that's the whole signature. two args, void return, no drama. ✨

🎀 ARGUMENTS 🎀

  • head — the wake_q_head you're adding task to. it's literally the list you're throwing the task onto. 📋
  • task — the task you're queueing up for a 'later' wakeup. the sleepy little guy. 😴

🦋 DESCRIPTION 🦋

so the whole vibe here is: you queue a task for a later wakeup, most likely by the wake_up_q call in the same context. that's the plan, that's the dream. 💭

BUT — and she said what she said — _HOWEVER_ this is not guaranteed. the wakeup can come instantly. like, no warning, icon behaviour, it just happens. ⚡ so don't build your whole personality around "it'll definitely happen later." 🙈

ok now the important part, pay attention: this function must be used as-if it were wake_up_process. IOW — in other words, iykyk — the task must be ready to be woken at this location. that's a real requirement, not a suggestion, so please don't @ me. 🔥

🌈 SEE ALSO 🌈

go read these too, they're all in the Kernel file ./kernel/sched/core.c and they're all lowkey iconic:

that's the whole reading list, bestie. study up, there will be a vibes-based quiz. 📚✨

mwah 💋 that's a wrap, ily, go queue some wakeups responsibly. this page came out of ./kernel/sched and it's dated October 2026 — so like, from the future, which honestly tracks. periodt. 🦋🎀💜

📦 where this page comes from