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authorStephen Hemminger <shemminger@osdl.org>2006-06-02 17:51:08 -0700
committerDavid S. Miller <davem@davemloft.net>2006-06-02 17:51:08 -0700
commitfb80a6e1a521eb298edb4365429d533dd39427fa (patch)
treec832c3544aea353aaf73b5536e9ac1579d8fbfaf /net
parent0f3262157899efd422228713a521504bdf0c991e (diff)
[TCP] tcp_highspeed: Fix problem observed by Xiaoliang (David) Wei
When snd_cwnd is smaller than 38 and the connection is in congestion avoidance phase (snd_cwnd > snd_ssthresh), the snd_cwnd seems to stop growing. The additive increase was confused because C array's are 0 based. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/tcp_highspeed.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c
index b72fa55dfb84..ba7c63ca5bb1 100644
--- a/net/ipv4/tcp_highspeed.c
+++ b/net/ipv4/tcp_highspeed.c
@@ -135,7 +135,8 @@ static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt,
/* Do additive increase */
if (tp->snd_cwnd < tp->snd_cwnd_clamp) {
- tp->snd_cwnd_cnt += ca->ai;
+ /* cwnd = cwnd + a(w) / cwnd */
+ tp->snd_cwnd_cnt += ca->ai + 1;
if (tp->snd_cwnd_cnt >= tp->snd_cwnd) {
tp->snd_cwnd_cnt -= tp->snd_cwnd;
tp->snd_cwnd++;