From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Date: Sun, 17 May 2009 01:57:43 +0000 (+0900)
Subject: nilfs2: set bio unplug flag for the last bio in segment
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=30bda0b8ae470997dc681d6fd82108bac5caebf8;p=deliverable%2Flinux.git

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 dc0277a306ca..9e3fe17bb96b 100644
--- 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;