gen_pool_set_algo(9)

💅 gen_pool_set_algo — like, the manual page bestie

okay so this is gen_pool_set_algo(9) from the Kernel API Manual ✨ — yes, that's the same name as the title, we're not being subtle, it's the function and it's the main character. Scroll down and I'll tell you everything 🫶

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🌸 NAME

gen_pool_set_algo — set the allocation algorithm 💫

That's it. That's the whole vibe. You're swapping out how this pool picks a chunk. Iconic behavior, honestly.

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✨ SYNOPSIS

void gen_pool_set_algo (struct gen_pool *pool , genpool_algo_t algo ,
       void *data );

Like, it takes three things and gives you nothing back — void return, no notes, no drama, it just does the thing 💅 (spoiler: nothing gets returned, don't @ me, that's literally what the synopsis says)

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🎀 ARGUMENTS

• pool — the pool you're changing the allocation algorithm on. Your girl. Your project. 🌸
• algo — a custom algorithm function. That's the whole point, bestie, this is the function you're installing 🔥
• data — additional data used by algo. Extra stuff it needs. It gets handed over to your algo, iykyk ✨

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🦋 DESCRIPTION

okay so here's the tea ☕: this calls algo for each memory allocation in the pool. Every single one. No skipping, no shortcuts, no "ugh not this one again" 🙈

And if algo is NULL? No worries — it uses gen_pool_first_fit as the default memory allocation function 🎀 so you literally cannot break it by passing nothing. It's got a backup plan. Lowkey so thoughtful of it 🫶

ngl, this is the "change the strategy mid-game" move. The pool keeps on pooling, it just pools differently now 💫

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👑 SEE ALSO

Kernel file ./lib/genalloc.c 📁 — that's where the real magic lives, go look:

gen_pool_create(9), gen_pool_add_owner(9), gen_pool_virt_to_phys(9), gen_pool_destroy(9), gen_pool_alloc_algo_owner(9), gen_pool_dma_alloc(9), gen_pool_dma_alloc_algo(9), gen_pool_dma_alloc_align(9), gen_pool_dma_zalloc(9), gen_pool_dma_zalloc_algo(9), gen_pool_dma_zalloc_align(9), gen_pool_free_owner(9), gen_pool_for_each_chunk(9), gen_pool_has_addr(9), gen_pool_avail(9), gen_pool_size(9), gen_pool_first_fit(9), gen_pool_first_fit_align(9), gen_pool_fixed_alloc(9), gen_pool_first_fit_order_align(9), gen_pool_best_fit(9), gen_pool_get(9), devm_gen_pool_create(9), of_gen_pool_get(9)

the whole friend group, fr fr 🌈

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that's the page, bestie 💜 this one comes from the source directory ./lib, dated October 2026 — stay hydrated, keep your pools aligned, and slay ✨💅🎀