kmemleak_alloc_percpu(9)

🦋 kmemleak_alloc_percpu(9) — Kernel API Manual 🦋

okay so bestie, you opened the page for kmemleak_alloc_percpu(9) from the Kernel API Manual, and it's giving “small function, very important job.” no cap. 💅

✨ NAME ✨

kmemleak_alloc_percpu — register a newly allocated __percpu object

🌸 SYNOPSIS 🌸

void __ref kmemleak_alloc_percpu (const void __percpu *ptr , size_t size
       , gfp_t gfp );

that's the whole signature, bestie. She's void, she's __ref, and she's here to register. periodt. 🎀

🎀 ARGUMENTS 🎀

• ptr — the __percpu pointer to the beginning of the object. Like, the object's little home address. 🏡
• size — the size of the object. Yes, the actual size. 📏
• gfp — flags used for kmemleak internal memory allocations. This is the gfp situation for kmemleak's own internal memory allocations. 🍓

💖 DESCRIPTION 💖

okay so this function is called from the kernel percpu allocator when a new object (a.k.a. a memory block) is allocated — specifically with alloc_percpu. It's the “new percpu object just dropped” registration moment. ✨

🌈 SEE ALSO 🌈

the whole kmemleak crew, living in the Kernel file ./mm/kmemleak.c:

• kmemleak_alloc(9)
• kmemleak_vmalloc(9)
• kmemleak_free(9)
• kmemleak_free_part(9)
• kmemleak_free_percpu(9)
• kmemleak_update_trace(9)
• kmemleak_not_leak(9)
• kmemleak_transient_leak(9)
• kmemleak_ignore_percpu(9)
• kmemleak_ignore(9)
• kmemleak_scan_area(9)
• kmemleak_no_scan(9)
• kmemleak_alloc_phys(9)
• kmemleak_free_part_phys(9)
• kmemleak_ignore_phys(9)

source/version: ./mm · date: October 2026 — byeee bestie, mwah 💋🫶