wake_up_all_idle_cpus(9)

💖 wake_up_all_idle_cpus(9) 💖

okay bestie, welcome to the Kernel API Manual — this one is literally so short and so iconic for it. it's wake_up_all_idle_cpus, and yes, the name is the whole personality 🎀

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✨ NAME ✨

wake_up_all_idle_cpus — break all cpus out of idle. wake_up_all_idle_cpus tries to break all cpus which is in idle state, even including idle polling cpus, for non-idle cpus, we will do nothing for them. no cap, that's the whole job 🦋

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🌸 SYNOPSIS 🌸

void wake_up_all_idle_cpus (void );

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💅 ARGUMENTS 💅

• void — no arguments. that's it. that's the entire input list. zero notes, main character energy only 👑

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🌈 SEE ALSO 🌈

the whole friend group shows up here, and honestly they ate:

• Kernel file ./kernel/smp.c
• csd_lock_is_stuck(9)
• generic_smp_call_function_single_interrupt(9)
• __flush_smp_call_function_queue(9)
• flush_smp_call_function_queue(9)
• smp_call_function_single(9)
• smp_call_function_single_async(9)
• smp_call_function_any(9)
• smp_call_function_many(9)
• smp_call_function(9)
• on_each_cpu_cond_mask(9)
• kick_all_cpus_sync(9)
• cpus_peek_for_pending_ipi(9)
• struct smp_call_on_cpu_struct(9)
• smp_call_on_cpu(9)

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💀 quick vibe check: it only wakes the idle ones — for non-idle cpus, we will do nothing for them. that's not a bug, that's boundaries. 🙈

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and that's the page!! mwah 💋 sourced straight from ./kernel, dated October 2026, filed under wake_up_all_idle_cpus(9) — go wake those idle cpus bestie, they're literally waiting 💜✨👑