[XFS] Update XFS documentation for noikeep/ikeep.

Mention how DMAPI affects default for noikeep.
Slightly modified since Josef's patch was based on
an old xfs.txt prior to Dave's (dgc) checkin which
missed going to oss.

Signed-off-by: Josef Sipek <jeffpc@josefsipek.net>
Signed-off-by: Tim Shimmin <tes@sgi.com>

diff --git a/Documentation/filesystems/xfs.txt b/Documentation/filesystems/xfs.txt
index 10ba81f..0a1668b 100644 (file)
--- a/Documentation/filesystems/xfs.txt
+++ b/Documentation/filesystems/xfs.txt
@@ -59,7 +59,8 @@ When mounting an XFS filesystem, the following options are accepted.
        When ikeep is specified, XFS does not delete empty inode clusters
        and keeps them around on disk. ikeep is the traditional XFS
        behaviour. When noikeep is specified, empty inode clusters
-       are returned to the free space pool. The default is noikeep.
+       are returned to the free space pool. The default is noikeep for
+       non-DMAPI mounts, while ikeep is the default when DMAPI is in use.
 
   inode64
        Indicates that XFS is allowed to create inodes at any location