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[TCP]: Minimum congestion window consolidation.

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Many of the TCP congestion methods all just use ssthresh
as the minimum congestion window on decrease.  Rather than
duplicating the code, just have that be the default if that
handle in the ops structure is not set.

Minor behaviour change to TCP compound.  It probably wants
to use this (ssthresh) as lower bound, rather than ssthresh/2
because the latter causes undershoot on loss.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2006-06-05 17:30:08 -07:00
committed by David S. Miller
parent a4ed258495
commit 72dc5b9225
9 changed files with 23 additions and 48 deletions
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9
net/ipv4/tcp_htcp.c
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@@ -246,14 +246,6 @@ static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
}
}
/* Lower bound on congestion window. */
static u32 htcp_min_cwnd(struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
return tp->snd_ssthresh;
}
static void htcp_init(struct sock *sk)
{
struct htcp *ca = inet_csk_ca(sk);
@@ -285,7 +277,6 @@ static void htcp_state(struct sock *sk, u8 new_state)
static struct tcp_congestion_ops htcp = {
.init = htcp_init,
.ssthresh = htcp_recalc_ssthresh,
.min_cwnd = htcp_min_cwnd,
.cong_avoid = htcp_cong_avoid,
.set_state = htcp_state,
.undo_cwnd = htcp_cwnd_undo,