Keep more pointers free in the nodes for double splits

diff --git a/ctree.c b/ctree.c
index eea7936..184d842 100644 (file)
--- a/ctree.c
+++ b/ctree.c
@@ -1107,7 +1107,7 @@ again:
                                slot -= 1;
                        p->slots[level] = slot;
                        if (ins_len > 0 && btrfs_header_nritems(b) >=
-                           BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
+                           BTRFS_NODEPTRS_PER_BLOCK(root) - 3) {
                                int sret = split_node(trans, root, p, level);
                                BUG_ON(sret > 0);
                                if (sret)
@@ -1446,7 +1446,7 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
                ret = push_nodes_for_insert(trans, root, path, level);
                c = path->nodes[level];
                if (!ret && btrfs_header_nritems(c) <
-                   BTRFS_NODEPTRS_PER_BLOCK(root) - 1)
+                   BTRFS_NODEPTRS_PER_BLOCK(root) - 3)
                        return 0;
                if (ret < 0)
                        return ret;