From: Srinivas Eeda <srinivas.eeda@oracle.com>
Date: Wed, 17 Oct 2012 23:23:41 +0000 (-0700)
Subject: ocfs2: submit disk heartbeat bio using WRITE_SYNC
X-Git-Tag: v2.6.39-400.9.0~226^2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=1b64594cb8b10d8bb72af4b42661d153b6443eee;p=users%2Fjedix%2Flinux-maple.git

ocfs2: submit disk heartbeat bio using WRITE_SYNC

Under heavy I/O load, writing the disk heartbeat can be forced
to wait for minutes, and this causes the node to be fenced.

This patch tries to use WRITE_SYNC in submitting the heartbeat
bio, so that writing the heartbeat will have a priority over
other requests.

Signed-off-by: Noboru Iwamatsu <n_iwamatsu at jp.fujitsu.com>
Acked-by: Tao Ma <boyu.mt at taobao.com>
Acked-by: Sunil Mushran <sunil.mushran at oracle.com>
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
---

diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index a4e855e3690e..61561c6a0cb0 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -500,7 +500,7 @@ static int o2hb_issue_node_write(struct o2hb_region *reg,
 	}
 
 	atomic_inc(&write_wc->wc_num_reqs);
-	submit_bio(WRITE, bio);
+	submit_bio(WRITE_SYNC, bio);
 
 	status = 0;
 bail: