filemap_get_folios_contig(9)

💖 filemap_get_folios_contig — Kernel API Manual ✨

okay so bestie, welcome to the filemap_get_folios_contig(9) page 🫶 this is the kernel API manual, and we're gonna get through it together, no cap.

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🌸 NAME 🌸

filemap_get_folios_contig — grab a whole batch of folios that are actually contiguous, bestie. not just "kinda near each other", like actually back-to-back 💅

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✨ SYNOPSIS ✨

unsigned filemap_get_folios_contig (struct address_space *mapping ,
pgoff_t *start , pgoff_t end , struct folio_batch *fbatch );

literally the whole signature, character for character, don't come for me 🙈

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🎀 ARGUMENTS 🎀

• mapping — the address_space we're searching through 🔍 that's the thing being searched, periodt.
• start — the starting page index. where we begin the hunt ⭐
• end — the final page index, and yes it's inclusive — end gets to come to the party too 💜
• fbatch — the batch we're filling up 🍓 this is the bucket, we put the folios in it.

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🦋 DESCRIPTION 🦋

so filemap_get_folios_contig works exactly like filemap_get_folios, bestie — same energy, same behaviour — except the folios it hands back are guaranteed to be contiguous 🔥 that's the whole flex.

quick heads up tho: it may not return all the contiguous folios, because if the batch gets filled up, that's it, we're done, the bucket is full 😭 so don't assume you got everything, iykyk.

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👑 RETURN 👑

it returns the number of folios found 🔢 and it also updates start so it's positioned for traversal of the next folio — so like, start gets moved along for you, she's doing her own thing now 💫

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💀 SEE ALSO 💀

okay this list is giving "the entire group chat got added to the call" — but every single one of these matters, so here we go 🌈

Kernel file ./mm/filemap.c, filemap_remove_folio(9), 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_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)

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and that's the page, bestie!! 🧚 mwah 💋 this lil cutie came from ./mm, dated October 2026, and she is officially filemap_get_folios_contig(9) — slay, ate, no crumbs, periodt 👑