pcpu_chunk_map_bits(9)

💅 pcpu_chunk_map_bits(9) 💅

okay so bestie, we're in the Kernel API Manual today and this little icon is called pcpu_chunk_map_bits — say it with me, it's giving "tiny helper function with main character energy" ✨

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🌸 NAME 🌸

pcpu_chunk_map_bits — a lil helper that converts nr_pages into the size of a bitmap 🎀

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🦋 SYNOPSIS 🦋

int pcpu_chunk_map_bits (struct pcpu_chunk *chunk );

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💖 ARGUMENTS 💖

• chunk — the chunk of interest 🫶 like, the one you actually care about, your fave chunk, the chunk in question

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✨ DESCRIPTION ✨

so what's the vibe here? this function does a conversion — and no cap, that's literally its whole thing 💀

It goes from the number of physical pages that the chunk serves → over to the number of bits in the bitmap. That's the glow-up. page count in, bitmap bits out, slay 🌈

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🔥 SEE ALSO 🔥

• Kernel file ./mm/percpu-internal.h
• pcpu_chunk_nr_blocks(9)
• pcpu_nr_pages_to_map_bits(9)
• pcpu_obj_full_size(9)

like, go read those too, they're lowkey part of the same friend group 👑

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ngl this one's short and sweet — but that's the point, it's a helper, not the whole saga 💅

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mwah 💜 this page came from ./mm, dated October 2026 — that's the source and the date, bestie, noted and slayed ✨