allowed_space    2713 net/ipv4/tcp_output.c 	int allowed_space = tcp_full_space(sk);
allowed_space    2714 net/ipv4/tcp_output.c 	int full_space = min_t(int, tp->window_clamp, allowed_space);
allowed_space    2741 net/ipv4/tcp_output.c 		if (free_space < (allowed_space >> 4) || free_space < mss)