--- zzzz-none-000/linux-2.6.32.61/net/ipv4/tcp_timer.c	2013-06-10 09:43:48.000000000 +0000
+++ virian-300e-630/linux-2.6.32.61/net/ipv4/tcp_timer.c	2011-05-25 13:51:48.000000000 +0000
@@ -496,7 +496,7 @@
 	elapsed = keepalive_time_when(tp);
 
 	/* It is alive without keepalive 8) */
-	if (tp->packets_out || tcp_send_head(sk))
+	if (icsk->icsk_retransmits == 0 && (tp->packets_out || tcp_send_head(sk)))
 		goto resched;
 
 	elapsed = tcp_time_stamp - tp->rcv_tstamp;