schedule_preempt_disabled(9)

💅 schedule_preempt_disabled — a Kernel API Manual moment

okay so bestie, welcome to the little page for schedule_preempt_disabled(9), straight out of the Kernel API Manual. it's short, it's iconic, it's lowkey doing a lot with very few words. let's get into it 🫶

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✨ NAME ✨

schedule_preempt_disabled — the one you call when preemption is already switched off. that's the whole vibe. no cap.

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🌸 SYNOPSIS 🌸

void schedule_preempt_disabled (void );

that's it. that's the whole signature. she's minimal, she's clean, she's giving main character energy 💅

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🎀 ARGUMENTS 🎀

• void — no arguments, bestie. zero. nada. nothing to pass in, nothing to stress about 🙈

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⭐ DESCRIPTION ⭐

so here's the tea: this function returns with preemption disabled. like, you go in with preemption off and you come back out with preemption off. the vibe check stays the same the entire time ✨

⚠️ and listen — the note is important: preempt_count must be 1. not zero, not two, not "eh somewhere around there". it's 1. respect the count, fr fr 💀

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🦋 SEE ALSO 🦋

the whole friend group, in Kernel file ./kernel/sched/core.c:

• wake_q_add(9)
• wake_q_add_safe(9)
• task_curr(9)
• try_to_wake_up(9)
• task_call_func(9)
• cpu_curr_snapshot(9)
• wake_up_process(9)
• preempt_notifier_register(9)
• preempt_notifier_unregister(9)
• prepare_task_switch(9)
• finish_task_switch(9)
• schedule_tail(9)
• preempt_schedule_notrace(9)
• init_idle(9)
• curr_task(9)

like, the scheduler core squad is right there — go read them too, iykyk 👑

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🌈 okay that's the page!! thanks for coming to my ted talk 🧚💖 this little writeup came from ./kernel/sched, dated October 2026, and it's filed under schedule_preempt_disabled(9). slay, bye bestie 🎀✨