free_unnecessary_pages(9)

okay bestie, we're deep in the Kernel API Manual and the page is free_unnecessary_pages(9) — yes, that's the whole vibe. Let's get into it 💖

🌸 NAME 🌸

free_unnecessary_pages — release preallocated pages that are not needed for the image. literally just freeing up the extra pages the image doesn't need anymore, no cap ✨

🦋 SYNOPSIS 🦋

unsigned long free_unnecessary_pages (void );

that's the whole signature, bestie. she takes nothing and returns an unsigned long, periodt 💅

🎀 ARGUMENTS 🎀

• void — no arguments. zero. nada. it's giving silent main character energy 🙈

👑 SEE ALSO 👑

the kernel file spot is ./kernel/power/snapshot.c — and these are the besties you should also go say hi to, fr fr:

• get_image_page(9)
• free_image_page(9)
• alloc_rtree_node(9)
• free_mem_extents(9)
• create_mem_extents(9)
• memory_bm_next_pfn(9)
• mark_nosave_pages(9)
• create_basic_memory_bitmaps(9)
• free_basic_memory_bitmaps(9)
• snapshot_additional_pages(9)
• count_free_highmem_pages(9)
• count_highmem_pages(9)
• count_data_pages(9)
• swsusp_free(9)
• preallocate_image_pages(9)
• minimum_image_size(9)
• hibernate_preallocate_memory(9)
• pack_pfns(9)
• snapshot_read_next(9)
• unpack_orig_pfns(9)
• count_highmem_image_pages(9)
• prepare_highmem_image(9)
• copy_last_highmem_page(9)
• prepare_image(9)
• snapshot_write_next(9)
• restore_highmem(9)

and that's the page, bestie 🫶 this iconic little manual entry is living in ./kernel/power, dated October 2026 — mwah, slay, bye 💋🌈