gnttab_dma_alloc_pages(9)

💅 gnttab_dma_alloc_pages — Kernel API Manual ✨

okay bestie, so this is a page straight out of the Kernel API Manual, and it's about one very specific little function that lives in the Xen corner of the kernel. she's niche, she's focused, and she does exactly one thing. let's get into it 🎀

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✨ NAME ✨

gnttab_dma_alloc_pages — alloc DMAable pages suitable for grant mapping into

like, literally that's her whole job. she allocates pages that are DMAable, meaning the hardware can actually do direct memory access on them, AND they're suitable for grant mapping into. two vibes in one function, honestly iconic 💅

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🦋 SYNOPSIS 🦋

int gnttab_dma_alloc_pages (struct gnttab_dma_alloc_args *args );

that's it, that's the whole call. she takes one pointer and hands you back an int. no cap 🫶

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🌸 ARGUMENTS 🌸

• args — arguments to the function. yeah, that's the whole description in the original and I'm not gonna invent lore that isn't there 😭 it's a struct gnttab_dma_alloc_args * and it's carrying everything this function needs. that's the assignment. that's the vibe check. periodt.

ngl, the manpage is very chill about what's inside args — so I'm being chill too. no guessing, no making things up, we respect the source 🙈

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👑 SEE ALSO 👑

• Kernel file ./drivers/xen/grant-table.c — that's where the actual source lives, go read her in her natural habitat 🧚
• gnttab_alloc_pages(9)
• gnttab_free_pages(9)
• gnttab_dma_free_pages(9)

all her siblings fr fr — one allocates, one frees, and the DMA variants keep the DMA party going 💖

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and that's the whole page bestie!! short, sweet, and extremely on brand ✨ this one comes to you from the ./drivers/xen corner of the kernel, dated October 2026 — so like, future vibes but make it documentation 🌈 mwah, go allocate responsibly 💜💅