[PATCH 08/11] ext4: add support for passing in write hints for buffered writes

[Jens Axboe]

Reviewed-by: Andreas Dilger <adil...@dilger.ca>
Signed-off-by: Jens Axboe <ax...@kernel.dk>
---
 fs/ext4/page-io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 1a82138ba739..fbc04a8cb35a 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -349,6 +349,7 @@ 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_op_flags |= 
write_hint_to_opf(inode_write_hint(io->io_end->inode));
                bio_set_op_attrs(io->io_bio, REQ_OP_WRITE, io_op_flags);
                submit_bio(io->io_bio);
        }
@@ -396,6 +397,7 @@ 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_opf |= 
write_hint_to_opf(inode_write_hint(inode));
        }
        ret = bio_add_page(io->io_bio, page, bh->b_size, bh_offset(bh));
        if (ret != bh->b_size)
-- 
2.7.4