SOCK_MIN_RCVBUF 542 net/core/sock.c if ((val * 2) < SOCK_MIN_RCVBUF) SOCK_MIN_RCVBUF 543 net/core/sock.c sk->sk_rcvbuf = SOCK_MIN_RCVBUF; SOCK_MIN_RCVBUF 2139 net/ipv4/tcp.c tp->window_clamp = val < SOCK_MIN_RCVBUF / 2 ? SOCK_MIN_RCVBUF 2140 net/ipv4/tcp.c SOCK_MIN_RCVBUF / 2 : val;