Documentation: filesystems: add new btrfs mount options

Two new options were added in 3.12: commit and rescan_uuid_tree

CC: linux-doc@vger.kernel.org
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt
index 9dae59407437..4ced8be43c88 100644
--- a/Documentation/filesystems/btrfs.txt
+++ b/Documentation/filesystems/btrfs.txt
@@ -70,6 +70,12 @@ Unless otherwise specified, all options default to off.
 
         See comments at the top of fs/btrfs/check-integrity.c for more info.
 
+  commit=<seconds>
+        Set the interval of periodic commit, 30 seconds by default. Higher
+        values defer data being synced to permanent storage with obvious
+        consequences when the system crashes. The upper bound is not forced,
+        but a warning is printed if it's more than 300 seconds (5 minutes).
+
   compress
   compress=<type>
   compress-force
@@ -154,7 +160,11 @@ Unless otherwise specified, all options default to off.
         Currently this scans a list of several previous tree roots and tries to 
         use the first readable.
 
- skip_balance
+  rescan_uuid_tree
+        Force check and rebuild procedure of the UUID tree. This should not
+        normally be needed.
+
+  skip_balance
         Skip automatic resume of interrupted balance operation after mount.
         May be resumed with "btrfs balance resume."