[TCP]: Fix sysctl_tcp_low_latency
David S. Miller [Sun, 19 Jun 2005 06:01:10 +0000 (23:01 -0700)]
When enabled, this should disable UCOPY prequeue'ing altogether,
but it does not due to a missing test.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/tcp.c

index 3a4c52e..674bbd8 100644 (file)
@@ -1326,7 +1326,7 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 
                cleanup_rbuf(sk, copied);
 
-               if (tp->ucopy.task == user_recv) {
+               if (!sysctl_tcp_low_latency && tp->ucopy.task == user_recv) {
                        /* Install new reader */
                        if (!user_recv && !(flags & (MSG_TRUNC | MSG_PEEK))) {
                                user_recv = current;