1 files changed, 12 insertions, 1 deletions

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index fff2c28497b6..ed88f5ee4bea 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -171,6 +171,10 @@ static int mergable_maps(struct extent_map *prev, struct extent_map *next)
         if (test_bit(EXTENT_FLAG_COMPRESSED, &prev->flags))
                 return 0;
 
+        if (test_bit(EXTENT_FLAG_LOGGING, &prev->flags) ||
+            test_bit(EXTENT_FLAG_LOGGING, &next->flags))
+                return 0;
+
         if (extent_map_end(prev) == next->start &&
             prev->flags == next->flags &&
             prev->bdev == next->bdev &&
@@ -256,7 +260,8 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
         if (!em)
                 goto out;
 
-        list_move(&em->list, &tree->modified_extents);
+        if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags))
+                list_move(&em->list, &tree->modified_extents);
         em->generation = gen;
         clear_bit(EXTENT_FLAG_PINNED, &em->flags);
         em->mod_start = em->start;
@@ -281,6 +286,12 @@ out:
 
 }
 
+void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em)
+{
+        clear_bit(EXTENT_FLAG_LOGGING, &em->flags);
+        try_merge_map(tree, em);
+}
+
 /**
  * add_extent_mapping - add new extent map to the extent tree
  * @tree:       tree to insert new map in