Merge branches 'for-4.11/upstream-fixes', 'for-4.12/accutouch', 'for-4.12/cp2112...

[mirror_ubuntu-artful-kernel.git] / Documentation / device-mapper / cache.txt

diff --git a/Documentation/device-mapper/cache.txt b/Documentation/device-mapper/cache.txt
index 785eab87aa71dc68aceeb970676a614c9c2c6381..f228604ddbcd6890c1db0ef2778422a499cbd480 100644 (file)
--- a/Documentation/device-mapper/cache.txt
+++ b/Documentation/device-mapper/cache.txt
@@ -207,6 +207,10 @@ Optional feature arguments are:
                   block, then the cache block is invalidated.
                   To enable passthrough mode the cache must be clean.
 
+   metadata2   : use version 2 of the metadata.  This stores the dirty bits
+                  in a separate btree, which improves speed of shutting
+                 down the cache.
+
 A policy called 'default' is always registered.  This is an alias for
 the policy we currently think is giving best all round performance.