swiotlb_adjust_nareas(9)

💖 swiotlb_adjust_nareas(9) 💖

okay so this is a page from the Kernel API Manual, bestie — sit down, hydrate, and let's talk about tweaking the vibes of your memory pool 🧚

✨ NAME ✨

swiotlb_adjust_nareas — adjust the number of areas and slots 🎀

🌸 SYNOPSIS 🌸

void swiotlb_adjust_nareas (unsigned int nareas );

💅 ARGUMENTS 💅

• nareas — the desired number of areas, queen. and listen: zero is treated as 1. so don't come in here with a 0 and expect 0 areas, that's not the timeline we're on 🙈

🦋 DESCRIPTION 🦋

So this function adjusts the default number of areas in a memory pool. that's the whole main-character move 💫

and because the universe loves consequences: the default size of the memory pool may also change to meet minimum area size requirements. so it's giving "we're adjusting one thing but the pool might shift too" — no cap, that's literally in the spec 💀

🔥 SEE ALSO 🔥

• Kernel file ./kernel/dma/swiotlb.c
• struct io_tlb_slot(9)
• struct io_tlb_area(9)
• limit_nareas(9)
• add_mem_pool(9)
• alloc_dma_pages(9)
• swiotlb_alloc_tlb(9)
• swiotlb_free_tlb(9)
• swiotlb_alloc_pool(9)
• swiotlb_dyn_alloc(9)
• __swiotlb_find_pool(9)
• swiotlb_del_pool(9)
• swiotlb_dev_init(9)
• swiotlb_align_offset(9)
• swiotlb_search_pool_area(9)
• swiotlb_search_area(9)
• swiotlb_find_slots(9)
• mem_pool_used(9)
• mem_used(9)
• swiotlb_tbl_map_single(9)
• swiotlb_del_transient(9)
• is_swiotlb_allocated(9)
• default_swiotlb_base(9)
• default_swiotlb_limit(9)

okay that's the whole scroll 🫶 and for the sign-off: this one lives in the source directory ./kernel/dma, version vibe October 2026, and it's filed under swiotlb_adjust_nareas(9) — stan. periodt 💜✨