[PATCH] Disable Nagle algorithm for RPC over TCP.

The Nagle algorithm gets in the way when sending short RPC messages to
the server. The following patch from Chuck does the equivalent of
setting TCP_NODELAY on the socket.

net/sunrpc/xprt.c

@@ -1446,6 +1446,8 @@ xprt_bind_socket(struct rpc_xprt *xprt, struct socket *sock)
 		sk->no_check = UDP_CSUM_NORCV;
 		xprt_set_connected(xprt);
 	} else {
+		struct tcp_opt *tp = tcp_sk(sk);
+		tp->nonagle = 1;	/* disable Nagle's algorithm */
 		sk->data_ready = tcp_data_ready;
 		sk->state_change = tcp_state_change;
 		xprt_clear_connected(xprt);