WHATS_NEW_DM          | 4 ++++

 libdm/libdm-deptree.c | 3 ++-

 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM

index 9e30786..71b25ba 100644

--- a/WHATS_NEW_DM

+++ b/WHATS_NEW_DM

@@ -1,3 +1,7 @@

+Version 1.02.110 - 

+======================================

+  Enforce writethrough mode for cleaner policy.

+

 Version 1.02.108 - 

 =====================================

   Do not check for full thin pool when activating without messages (1.02.107).

diff --git a/libdm/libdm-deptree.c b/libdm/libdm-deptree.c

index 7b7ca5b..fc79e33 100644

--- a/libdm/libdm-deptree.c

+++ b/libdm/libdm-deptree.c

@@ -3456,7 +3456,8 @@ int dm_tree_node_add_cache_target(struct dm_tree_node *node,

 		return_0;

 	seg->data_block_size = data_block_size;

-	seg->flags = feature_flags;

+	/* Enforce WriteThough mode for cleaner policy */

+	seg->flags = (strcmp(policy_name, "cleaner") == 0) ? DM_CACHE_FEATURE_WRITETHROUGH : feature_flags;

 	seg->policy_name = policy_name;

 	/* FIXME: better validation missing */