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[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>
This commit is contained in:
Stephen Hemminger 2006-06-02 17:51:08 -07:00 committed by David S. Miller
parent 0f32621578
commit fb80a6e1a5
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/tcp_highspeed.c
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@ -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++;