find_cpu_id_range(9)

💅 find_cpu_id_range(9) 💅

okay so bestie, this is a page from the Kernel API Manual and honestly? it's a little guy with a big job. let's get into it ✨

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🌸 NAME 🌸

find_cpu_id_range — literally goes and finds you a linear range of @nthreads free CPU ids. that's the whole vibe. 🎀

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✨ SYNOPSIS ✨

int find_cpu_id_range (unsigned int nthreads , int assigned_node ,
       cpumask_var_t *cpu_mask );

like. look at that signature. so clean. so iconic. 👑

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🫶 ARGUMENTS 🫶

• nthreads — the number of threads (cpu ids) you're asking for. it's an unsigned int, so no funny business with negatives, mmkay? 💖
• assigned_node — the node it belongs to, or NUMA_NO_NODE if free ids from any node can be peeked. yes bestie, you heard that right, you can just say "anywhere, idc" and it will go look around 👀✨
• cpu_mask — the returned CPU mask. this is the output, it's giving "here's your results, bestie" 🎁

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💀 DESCRIPTION 💀

Returns 0 on success. that's it. that's the description. no cap, it's a short one — but it's doing the most important thing and we respect it 🫡💜

ngl, if you were hoping for a novel here, there isn't one. the function succeeds and gives you 0. periodt.

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🔥 SEE ALSO 🔥

• Kernel file ./arch/powerpc/platforms/pseries/hotplug-cpu.c — go read it, iykyk 🦋

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and that's the whole page!! mwah 💋

this cutie lives under ./arch/powerpc/platforms/pseries and the docs are dated October 2026 — so go forth, find those free CPU ids, and slay 💅🌸⭐