cpus_peek_for_pending_ipi(9)

✨ cpus_peek_for_pending_ipi(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 — today's main character is cpus_peek_for_pending_ipi(9), and honestly? she's a little gossip girl for CPU interrupts. let's get into it 🎀

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💖 NAME 💖

cpus_peek_for_pending_ipi — check for pending IPI for CPUs 🦋

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🌸 SYNOPSIS 🌸

bool cpus_peek_for_pending_ipi (const struct cpumask *mask );

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🎀 ARGUMENTS 🎀

• mask — the CPU mask for the CPUs to check 👀 like, this is the guest list, and we're seeing who's got something waiting for them.

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✨ DESCRIPTION ✨

so what she does is: she walks through the mask 🌈 and checks if there are any pending IPIs scheduled, for any of the CPUs in the mask. that's it, that's the vibe 💅

but bestie, listen — it does not guarantee correctness, because it only provides a racy snapshot 😭 so like, it's giving "peek through the blinds" energy, not "certified official record" energy. no cap. treat what you see as a moment in time, not the whole truth 🫶

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⭐ RETURN ⭐

true if there is a pending IPI scheduled 💀 and false otherwise. simple as that, periodt.

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👑 SEE ALSO 👑

Kernel file ./kernel/smp.c and her whole friend group:

• 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)
• wake_up_all_idle_cpus(9)
• struct smp_call_on_cpu_struct(9)
• smp_call_on_cpu(9)

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ngl, if you're deep in ./kernel/smp.c lore, you already know 😌 iykyk.

okay that's the whole page, ily, go read some kernel source 💜

source: ./kernel · version: Kernel API Manual · dated: October 2026 — mwah, catch you on the next manpage 🧚‍♀️💖