pcpu_block_update(9)

👑 pcpu_block_update(9) 👑

okay bestie, welcome to the Kernel API Manual entry for pcpu_block_update(9) — the little block-updating icon we’re gonna understand together, no cap. 💅

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🌸 NAME 🌸

pcpu_block_update — updates a block given a free area, and yes that’s the whole vibe. ✨

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✨ SYNOPSIS ✨

void pcpu_block_update (struct pcpu_block_md *block , int start , int end );

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🎀 ARGUMENTS 🎀

• block — block of interest 🫶
• start — start offset in block
• end — end offset in block

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🦋 DESCRIPTION 🦋

So here’s the tea: this function updates a block given a known free area. 🍓

The region [start, end) is expected to be the entirety of the free area within a block. 👀

And if the contig hints are equal, it chooses the best starting offset. That’s it, that’s the lore. ⭐

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💜 SEE ALSO 💜

Kernel file ./mm/percpu.c — the source pointer, iykyk. 🌈

The whole linked crew, fr fr:

• pcpu_addr_in_chunk(9)
• pcpu_check_block_hint(9)
• pcpu_next_md_free_region(9)
• pcpu_next_fit_region(9)
• pcpu_mem_zalloc(9)
• pcpu_mem_free(9)
• pcpu_chunk_relocate(9)
• pcpu_chunk_refresh_hint(9)
• pcpu_block_refresh_hint(9)
• pcpu_block_update_hint_alloc(9)
• pcpu_block_update_hint_free(9)
• pcpu_is_populated(9)
• pcpu_find_block_fit(9)
• pcpu_alloc_area(9)
• pcpu_free_area(9)
• pcpu_alloc_first_chunk(9)
• pcpu_chunk_populated(9)
• pcpu_chunk_depopulated(9)
• pcpu_chunk_addr_search(9)
• pcpu_alloc(9)
• pcpu_balance_free(9)
• pcpu_balance_populated(9)
• pcpu_reclaim_populated(9)
• pcpu_balance_workfn(9)
• free_percpu(9)
• is_kernel_percpu_address(9)
• per_cpu_ptr_to_phys(9)
• pcpu_alloc_alloc_info(9)
• pcpu_free_alloc_info(9)
• pcpu_dump_alloc_info(9)
• pcpu_setup_first_chunk(9)
• pcpu_build_alloc_info(9)
• pcpu_embed_first_chunk(9)
• pcpu_page_first_chunk(9)

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Signed, sealed, slayed: source ./mm, version/date October 2026, page pcpu_block_update(9). 🎀💖