diff --git a/fs/bcachefs/btree_iter.c b/fs/bcachefs/btree_iter.c
index b65cd3566872..109efa73cd4c 100644
--- a/fs/bcachefs/btree_iter.c
+++ b/fs/bcachefs/btree_iter.c
@@ -3012,6 +3012,14 @@ void bch2_trans_begin(struct btree_trans *trans)
 	trans_for_each_path(trans, path) {
 		path->should_be_locked = false;
 
+		/*
+		 * If the transaction wasn't restarted, we're presuming to be
+		 * doing something new: dont keep iterators excpt the ones that
+		 * are in use - except for the subvolumes btree:
+		 */
+		if (!trans->restarted && path->btree_id != BTREE_ID_subvolumes)
+			path->preserve = false;
+
 		/*
 		 * XXX: we probably shouldn't be doing this if the transaction
 		 * was restarted, but currently we still overflow transaction