OCFS2_EXPAND_REFCOUNT_TREE_CREDITS
*credits += OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
*credits += OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
*credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;