[TCP] tcp_vegas: Fix slow start

Vegas' slow start was only adding one MSS per RTT rather than one for
every ack. Slow start behavior should now match Reno.

Signed-off-by: Thomas Young <tyo@ee.mu.oz.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 13e7e6e8df16..3b7403495052 100644
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -330,6 +330,10 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
                 vegas->cntRTT = 0;
                 vegas->minRTT = 0x7fffffff;
         }
+        /* Use normal slow start */
+        else if (tp->snd_cwnd <= tp->snd_ssthresh) 
+                tcp_slow_start(tp);
+        
 }
 
 /* Extract info for Tcp socket info provided via netlink. */