nilfs2: set bio unplug flag for the last bio in segment

This sets BIO_RW_UNPLUG flag on the last bio of each segment during
write.  The last bio should be unplugged immediately because the
caller waits for the completion after the submission.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index dc0277a306ca8f4f0b7df4a1001f458069247d81..9e3fe17bb96bcb86ec786a4469d659b9554ae399 100644 (file)
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -393,7 +393,7 @@ int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
                 * Last BIO is always sent through the following
                 * submission.
                 */
-               rw |= (1 << BIO_RW_SYNCIO);
+               rw |= (1 << BIO_RW_SYNCIO) | (1 << BIO_RW_UNPLUG);
                res = nilfs_submit_seg_bio(wi, rw);
                if (unlikely(res))
                        goto failed_bio;