pcpu_page_first_chunk(9)

💖 pcpu_page_first_chunk(9) 💖

okay bestie, welcome to the Kernel API Manual page for pcpu_page_first_chunk — she's section (9), she's a kernel function, and she's here to help with the first percpu chunk. main character energy, no cap. 💅

✨ NAME ✨

pcpu_page_first_chunk — map the first chunk using PAGE_SIZE pages 🎀

🌸 SYNOPSIS 🌸

int pcpu_page_first_chunk (size_t reserved_size ,
pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn );

🦋 ARGUMENTS 🦋

• reserved_size — the size of reserved percpu area in bytes. literally the byte count, bestie. 💜
• cpu_to_nd_fn — callback to convert cpu to it's node, optional. yes, optional — so it's giving "bring it if you got it" energy. 🫶

🧚 DESCRIPTION 🧚

This is a helper to ease setting up page-remapped first percpu chunk, and it can be called where pcpu_setup_first_chunk is expected. helper function ate, honestly. ✨

This is the basic allocator. Static percpu area is allocated page-by-page into vmalloc area. periodt. 💅

👑 RETURN 👑

0 on success, -errno on failure. that's the whole vibe check, bestie. 🫶

🌈 SEE ALSO 🌈

Kernel file ./mm/percpu.c is the home base 🏠 — and here's the whole percpu squad, all (9):

• 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_block_update(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)

mwah 💋 — this cutie comes from source/version ./mm, dated October 2026, and the footer is literally pcpu_page_first_chunk(9). bye bestie! 🌟