From: Thomas Young <tyo@ee.mu.oz.au>
Date: Wed, 4 Jan 2006 21:59:32 +0000 (-0800)
Subject: [TCP] tcp_vegas: Fix slow start
X-Git-Tag: v2.6.16-rc1~474^2~22^2~9^2
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=74cb8798222bb7d1aecb0acb91e6eeedf5feb948;p=~emulex%2Finfiniband.git

[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>
---

diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 13e7e6e8df1..3b740349505 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. */