mempool_alloc_preallocated(9)

💖 mempool_alloc_preallocated(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for mempool_alloc_preallocated(9), and it's genuinely such a vibe once you get it. buckle up 🎀

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🌸 NAME 🌸

mempool_alloc_preallocated — allocate an element from preallocated elements belonging to a memory pool 💅

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✨ SYNOPSIS ✨

void * mempool_alloc_preallocated (struct mempool *pool );

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🦋 ARGUMENTS 🦋

• pool — pointer to the memory pool 🫶 that's it, that's the whole argument list, we love a low-maintenance icon

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💜 DESCRIPTION 💜

okay so this function is literally the chill sibling of mempool_alloc. same energy, but it's only attempting to allocate an element from the preallocated elements — it does not go off and do anything extra. no cap 🔥

the way it stays efficient?? it only takes a single spinlock_t and then, if no preallocated elements are available, it immediately returns. no waiting around, no drama, just in and out 🧚✨

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🌈 RETURN 🌈

a pointer to the allocated element 💖 … or NULL if no elements are available 😭 (that's your vibe check telling you the preallocated pile is empty, fr fr)

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⭐ SEE ALSO ⭐

kernel file ./mm/mempool.c — where the magic lives 👑

and the whole friend group:

• mempool_exit(9)
• mempool_destroy(9)
• mempool_init(9)
• mempool_create_node(9)
• mempool_resize(9)
• mempool_alloc_bulk(9)
• mempool_alloc(9)
• mempool_free_bulk(9)
• mempool_free(9)

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and that's the page, bestie 🫶 big sign-off energy: this one lives in ./mm and it's dated October 2026 — iconic, no notes 💅✨🎀