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 <[email protected]>
Acked-by: Tao Ma <[email protected]>
Acked-by: Sunil Mushran <[email protected]>
Cc: Srinivas Eeeda <[email protected]>
Reviewed-by: Jie Liu <[email protected]>
Tested-by: Gurudas Pai <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: Mark Fasheh <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 42252bf64b5127f39eecb25a7aecd6f1cd57e511..f89b46b66235261234ac364329743c489f209ac1 100644 (file)
--- 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: