ext4: add support for passing in write hints for buffered writes

Reviewed-by: Andreas Dilger <[email protected]> Reviewed-by: Martin K. Petersen <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
mrcsosa · Jun 27, 2017 · 0127251 · 0127251
1 parent 8e8f929
commit 0127251
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
@@ -350,6 +350,7 @@ void ext4_io_submit(struct ext4_io_submit *io)
 	if (bio) {
 		int io_op_flags = io->io_wbc->sync_mode == WB_SYNC_ALL ?
 				  REQ_SYNC : 0;
+		io->io_bio->bi_write_hint = io->io_end->inode->i_write_hint;
 		bio_set_op_attrs(io->io_bio, REQ_OP_WRITE, io_op_flags);
 		submit_bio(io->io_bio);
 	}
@@ -397,6 +398,7 @@ static int io_submit_add_bh(struct ext4_io_submit *io,
 		ret = io_submit_init_bio(io, bh);
 		if (ret)
 			return ret;
+		io->io_bio->bi_write_hint = inode->i_write_hint;
 	}
 	ret = bio_add_page(io->io_bio, page, bh->b_size, bh_offset(bh));
 	if (ret != bh->b_size)