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Date: Thu, 3 May 2007 15:34:25 +0300 (EEST) From: "Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi> To: Netdev <netdev@...r.kernel.org> cc: David Miller <davem@...emloft.net> Subject: [PATCH] [TCP] Highspeed: Limited slow-start is nowadays in tcp_slow_start Reuse limited slow-start (RFC3742) included into tcp_cong instead of having another implementation in High Speed TCP. Compile tested only. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi> --- net/ipv4/tcp_highspeed.c | 24 +++--------------------- 1 files changed, 3 insertions(+), 21 deletions(-) diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c index a291097..43d624e 100644 --- a/net/ipv4/tcp_highspeed.c +++ b/net/ipv4/tcp_highspeed.c @@ -97,10 +97,6 @@ struct hstcp { u32 ai; }; -static int max_ssthresh = 100; -module_param(max_ssthresh, int, 0644); -MODULE_PARM_DESC(max_ssthresh, "limited slow start threshold (RFC3742)"); - static void hstcp_init(struct sock *sk) { struct tcp_sock *tp = tcp_sk(sk); @@ -122,23 +118,9 @@ static void hstcp_cong_avoid(struct sock if (!tcp_is_cwnd_limited(sk, in_flight)) return; - if (tp->snd_cwnd <= tp->snd_ssthresh) { - /* RFC3742: limited slow start - * the window is increased by 1/K MSS for each arriving ACK, - * for K = int(cwnd/(0.5 max_ssthresh)) - */ - if (max_ssthresh > 0 && tp->snd_cwnd > max_ssthresh) { - u32 k = max(tp->snd_cwnd / (max_ssthresh >> 1), 1U); - if (++tp->snd_cwnd_cnt >= k) { - if (tp->snd_cwnd < tp->snd_cwnd_clamp) - tp->snd_cwnd++; - tp->snd_cwnd_cnt = 0; - } - } else { - if (tp->snd_cwnd < tp->snd_cwnd_clamp) - tp->snd_cwnd++; - } - } else { + if (tp->snd_cwnd <= tp->snd_ssthresh) + tcp_slow_start(tp); + else { /* Update AIMD parameters. * * We want to guarantee that: -- 1.4.2
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