[PATCH 3/3] ext4: readpages() should submit IO as read-ahead

[Jens Axboe <axboe@xxxxxxxxx>]

a_ops->readpages() is only ever used for read-ahead. Ensure that we
pass this information down to the block layer.

Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
 fs/ext4/readpage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index 9ffa6fad18db..92b28273b223 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -259,7 +259,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
 			bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9);
 			bio->bi_end_io = mpage_end_io;
 			bio->bi_private = ctx;
-			bio_set_op_attrs(bio, REQ_OP_READ, 0);
+			bio_set_op_attrs(bio, REQ_OP_READ, REQ_RAHEAD);
 		}
 
 		length = first_hole << blkbits;
-- 
2.7.4