Commit e2e2e839 authored by David Howells's avatar David Howells
Browse files

netfs: Allocate multipage folios in the writepath 



Allocate a multipage folio when copying data into the pagecache if possible
if there's sufficient data to warrant it.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
parent 7f84a7b9

fs/netfs/buffered_write.c

+7 −2
Original line number Diff line number Diff line
@@ -84,14 +84,19 @@ static enum netfs_how_to_modify netfs_how_to_modify(struct netfs_inode *ctx, 
}



/*

 * Grab a folio for writing and lock it.

 * Grab a folio for writing and lock it.  Attempt to allocate as large a folio

 * as possible to hold as much of the remaining length as possible in one go.

 */

static struct folio *netfs_grab_folio_for_write(struct address_space *mapping,

						loff_t pos, size_t part)

{

	pgoff_t index = pos / PAGE_SIZE;

	fgf_t fgp_flags = FGP_WRITEBEGIN;



	return __filemap_get_folio(mapping, index, FGP_WRITEBEGIN,

	if (mapping_large_folio_support(mapping))

		fgp_flags |= fgf_set_order(pos % PAGE_SIZE + part);



	return __filemap_get_folio(mapping, index, fgp_flags,

				   mapping_gfp_mask(mapping));

}