ocfs2: Add dir_resv_level mount option

The default behavior for directory reservations stays the same, but we add a
mount option so people can tweak the size of directory reservations
according to their workloads.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt
index 32339e584a9a..1f7ae144f6d8 100644
--- a/Documentation/filesystems/ocfs2.txt
+++ b/Documentation/filesystems/ocfs2.txt
@@ -83,3 +83,7 @@ noacl		(*)	Disables POSIX Access Control Lists support.
 resv_level=2    (*)     Set how agressive allocation reservations will be.
                         Valid values are between 0 (reservations off) to 8
                         (maximum space for reservations).
+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.