cma_release(9)

💖 cma_release(9) — Kernel API Manual, bestie edition 🎀

okay so real talk: this is a page from the Kernel API Manual, and it's all about cma_release — releasing allocated pages. Yes, the name is literally in the NAME section below, no cap. Let's get into it ✨

🌸 NAME 🌸

cma_release — release allocated pages. That's it, that's the whole vibe: you allocated pages, now you're letting them go. 💅

✨ SYNOPSIS ✨

bool cma_release (struct cma *cma , const struct page *pages , unsigned
long count );

🦋 ARGUMENTS 🦋

• cma — the contiguous memory region that the allocation was performed for. Like, this is the area we're talking about, bestie.
• pages — the allocated pages themselves. The actual pages, right there.
• count — the number of allocated pages. Gotta say how many, fr fr.

💜 DESCRIPTION 💜

This function releases memory that was allocated by cma_alloc. Iconic behavior, honestly.

It returns false when the provided pages do not belong to the contiguous area — so that's your vibe check failing 😭 — and true otherwise. Periodt.

🔥 SEE ALSO 🔥

• Kernel file ./mm/cma.c
• cma_init_reserved_mem(9)
• cma_declare_contiguous_nid(9)
• cma_alloc(9)

and that's the whole page, bestie 🫶 this cutie came from ./mm, dated October 2026, and it's your friendly local cma_release(9) from the Kernel API Manual. go release those pages responsibly 💖✨