btree_blocks
if (b->written < btree_blocks(b))
btree_blocks(new_nodes[i]))
btree_blocks(new_nodes[i]));
b->written < btree_blocks(b) && i->seq == b->keys.set[0].data->seq;
btree_blocks(b))
if (b->written < btree_blocks(b))
block_bytes(n1->c->cache)) > (btree_blocks(b) * 4) / 5;
BUG_ON(b->written >= btree_blocks(b));