pcpu_check_block_hint(9)

👑 NAME 👑

okay bestie, welcome to the pcpu_check_block_hint(9) page from the Kernel API Manual ✨ this function is literally here to check against the contig hint, and that's the vibe 💅

pcpu_check_block_hint — check against the contig hint.

✨ SYNOPSIS ✨

bool pcpu_check_block_hint (struct pcpu_block_md *block , int bits , size_t align );

No cap, that's the whole signature 🫶

🎀 ARGUMENTS 🎀

• block — block of interest, aka the block you're checking on 👑
• bits — size of allocation 💖
• align — alignment of area (max PAGE_SIZE) 📏

💜 DESCRIPTION 💜

So the check is: can this allocation fit in the block's contig hint? That's it, that's the function ✨

Also, important note bestie: a chunk uses the same hints as a block, so this can also check against the chunk's contig hint. iykyk 🌀

🌈 SEE ALSO 🌈

Kernel file ./mm/percpu.c and the whole squad:

• pcpu_addr_in_chunk(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)
• pcpu_page_first_chunk(9)

this page came from ./mm, dated October 2026 — and yeah, it's the pcpu_check_block_hint(9) manual entry. mwah 💋