free_contig_range(9)

🌸 NAME 🌸

hey bestie!! welcome to the free_contig_range(9) page from the Kernel API Manual — this one is short and sweet, but the rule is very real. It's free_contig_range - - free the contiguous range of pages. 💖

✨ SYNOPSIS ✨

okay so here's the signature, copy-paste exact vibes:

void free_contig_range (unsigned long pfn , unsigned long nr_pages );

🎀 ARGUMENTS 🎀

• pfn — the start PFN to free. That's your starting point, bestie. 📍
• nr_pages — the Number of contiguous pages to free. Yes, plural, contiguous, count 'em. 🔢

💅 DESCRIPTION 💅

Okay so listen: this can only be used to free the allocated non-compound pages. That's the whole assignment. Allocated non-compound pages, periodt. 💅

🦋 SEE ALSO 🦋

Kernel file: ./mm/page_alloc.c. And here's the whole see-also friend group, every single one, no skipping:

• __get_pfnblock_flags_mask(9)
• get_pfnblock_bit(9)
• get_pfnblock_migratetype(9)
• __set_pfnblock_flags_mask(9)
• set_pfnblock_bit(9)
• clear_pfnblock_bit(9)
• set_pageblock_migratetype(9)
• __move_freepages_block_isolate(9)
• __putback_isolated_page(9)
• __free_pages(9)
• free_pages(9)
• alloc_pages_exact(9)
• alloc_pages_exact_nid(9)
• free_pages_exact(9)
• nr_free_zone_pages(9)
• nr_free_buffer_pages(9)
• find_next_best_node(9)
• free_reserved_pages(9)
• setup_per_zone_wmarks(9)
• __free_contig_range(9)
• alloc_contig_frozen_range(9)
• alloc_contig_range(9)
• alloc_contig_frozen_pages(9)
• alloc_contig_pages(9)
• free_contig_frozen_range(9)
• alloc_pages_nolock(9)

mwah 💋 — source: ./mm · date: October 2026 · page: free_contig_range(9). bye bestie, go free those contig pages responsibly 🫶✨