1 files changed, 17 insertions, 0 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 1bb408f737fb..f16411d3c252 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2318,6 +2318,23 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
                 ref->in_tree = 0;
                 rb_erase(&ref->rb_node, &delayed_refs->root);
                 delayed_refs->num_entries--;
+                if (locked_ref) {
+                        /*
+                         * when we play the delayed ref, also correct the
+                         * ref_mod on head
+                         */
+                        switch (ref->action) {
+                        case BTRFS_ADD_DELAYED_REF:
+                        case BTRFS_ADD_DELAYED_EXTENT:
+                                locked_ref->node.ref_mod -= ref->ref_mod;
+                                break;
+                        case BTRFS_DROP_DELAYED_REF:
+                                locked_ref->node.ref_mod += ref->ref_mod;
+                                break;
+                        default:
+                                WARN_ON(1);
+                        }
+                }
                 spin_unlock(&delayed_refs->lock);
 
                 ret = run_one_delayed_ref(trans, root, ref, extent_op,