filemap_remove_folio(9)

💖 NAME 💖

Okay so bestie, meet filemap_remove_folio from the Kernel API Manual — the function whose whole job is to Remove folio from page cache. periodt. 👑

✨ SYNOPSIS ✨

void filemap_remove_folio (struct folio *folio );

🎀 ARGUMENTS 🎀

• folio — the folio. literally the folio, that's the whole vibe. 🦋

🌸 DESCRIPTION 🌸

So here's the tea: this must be called only on folios that are locked and have been verified to be in the page cache. No cap. 🔥

And important: it will never put the folio into the free list, because the caller has a reference on the page. That's the whole reason, iykyk. 💅

👑 SEE ALSO 👑

Kernel file ./mm/filemap.c plus these iconic functions:

• filemap_fdatawrite_range(9)
• filemap_flush_range(9)
• filemap_flush(9)
• filemap_range_has_page(9)
• filemap_fdatawait_range(9)
• filemap_fdatawait_range_keep_errors(9)
• file_fdatawait_range(9)
• filemap_fdatawait_keep_errors(9)
• filemap_write_and_wait_range(9)
• file_check_and_advance_wb_err(9)
• file_write_and_wait_range(9)
• replace_page_cache_folio(9)
• softleaf_entry_wait_on_locked(9)
• folio_put_wait_locked(9)
• folio_unlock(9)
• folio_end_read(9)
• folio_end_private_2(9)
• folio_wait_private_2(9)
• folio_wait_private_2_killable(9)
• folio_end_writeback_no_dropbehind(9)
• folio_end_writeback(9)
• __folio_lock(9)
• page_cache_next_miss(9)
• page_cache_prev_miss(9)
• __filemap_get_folio_mpol(9)
• find_get_entries(9)
• find_lock_entries(9)
• filemap_get_folios(9)
• filemap_get_folios_contig(9)
• filemap_get_folios_tag(9)
• filemap_get_folios_dirty(9)
• filemap_read(9)
• generic_file_read_iter(9)
• filemap_splice_read(9)
• mapping_seek_hole_data(9)
• filemap_fault(9)
• read_cache_folio(9)
• mapping_read_folio_gfp(9)
• read_cache_page_gfp(9)
• __generic_file_write_iter(9)
• generic_file_write_iter(9)
• filemap_release_folio(9)
• filemap_invalidate_inode(9)
• filemap_cachestat(9)

And that's the whole page, bestie 💖 — source is ./mm, the date is October 2026, and the header vibes are filemap_remove_folio(9). Stay locked and loaded, mwah 🫶✨