mempool_init(9)

💖 mempool_init(9) 💖

okay so we're in the Kernel API Manual bestie, and today's main character is mempool_init(9) — the pool-initializing icon herself ✨

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🌸 NAME 🌸

mempool_init — initialize a memory pool 🫶

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✨ SYNOPSIS ✨

int mempool_init (struct mempool *pool , int min_nr , mempool_alloc_t
*alloc_fn , mempool_free_t *free_fn , void *pool_data );

like, that's the whole signature, no cap 💅

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🎀 ARGUMENTS 🎀

• pool — pointer to the memory pool that should be initialized. this is the glow-up target bestie 💖
• min_nr — the minimum number of elements guaranteed to be allocated for this pool. the bare minimum, and honestly? we respect a guaranteed floor ✨
• alloc_fn — user-defined element-allocation function. your own custom allocator, you do it yourself, main character energy 👑
• free_fn — user-defined element-freeing function. the matching cleanup bestie, they're a set fr fr 🫶
• pool_data — optional private data available to the user-defined functions. little secret stash for your callbacks, iykyk 🙈

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🦋 DESCRIPTION 🦋

So like... it's mempool_create, but the plot twist is it initializes the pool in place (i.e. embedded in another structure). same vibes, different placement — the pool lives inside your other struct instead of getting its own separate home. lowkey iconic, highkey efficient 💅✨

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⭐ RETURN ⭐

0 on success, negative error code otherwise. zero means slay, negative means 😭

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🔥 SEE ALSO 🔥

Kernel file ./mm/mempool.c — and the whole friend group: mempool_exit(9), mempool_destroy(9), mempool_create_node(9), mempool_resize(9), mempool_alloc_bulk(9), mempool_alloc(9), mempool_alloc_preallocated(9), mempool_free_bulk(9), mempool_free(9) 🧚‍♀️💜

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and that's the page bestie!! brought to you by the fine people over at ./mm 💖, dated October 2026 🌈 — go forth and initialize something, periodt 🎀