1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt
index 1f7ae144f6d8..5393e6611691 100644
--- a/Documentation/filesystems/ocfs2.txt
+++ b/Documentation/filesystems/ocfs2.txt
@@ -87,3 +87,10 @@ dir_resv_level=	(*)	By default, directory reservations will scale with file
                        reservations - users should rarely need to change this
                        value. If allocation reservations are turned off, this
                        option will have no effect.
+coherency=full  (*)     Disallow concurrent O_DIRECT writes, cluster inode
+                        lock will be taken to force other nodes drop cache,
+                        therefore full cluster coherency is guaranteed even
+                        for O_DIRECT writes.
+coherency=buffered      Allow concurrent O_DIRECT writes without EX lock among
+                        nodes, which gains high performance at risk of getting
+                        stale data on other nodes.

diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt index 1f7ae144f6d8..5393e6611691 100644 --- a/Documentation/filesystems/ocfs2.txt +++ b/Documentation/filesystems/ocfs2.txt
@@ -87,3 +87,10 @@ dir_resv_level= (*) By default, directory reservations will scale with file
87	reservations - users should rarely need to change this	87	reservations - users should rarely need to change this
88	value. If allocation reservations are turned off, this	88	value. If allocation reservations are turned off, this
89	option will have no effect.	89	option will have no effect.
		90	coherency=full (*) Disallow concurrent O_DIRECT writes, cluster inode
		91	lock will be taken to force other nodes drop cache,
		92	therefore full cluster coherency is guaranteed even
		93	for O_DIRECT writes.
		94	coherency=buffered Allow concurrent O_DIRECT writes without EX lock among
		95	nodes, which gains high performance at risk of getting
		96	stale data on other nodes.