From: Pengcheng Yang <yangpc@wangsu.com>
To: edumazet@google.com, ncardwell@google.com, davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Pengcheng Yang <yangpc@wangsu.com>
Subject: [PATCH RESEND net-next v2 1/5] tcp: fix stretch ACK bugs in BIC
Date: Mon, 16 Mar 2020 14:35:07 +0800 [thread overview]
Message-ID: <1584340511-9870-2-git-send-email-yangpc@wangsu.com> (raw)
In-Reply-To: <1584340511-9870-1-git-send-email-yangpc@wangsu.com>
Changes BIC to properly handle stretch ACKs in additive
increase mode by passing in the count of ACKed packets
to tcp_cong_avoid_ai().
Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
---
net/ipv4/tcp_bic.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/net/ipv4/tcp_bic.c b/net/ipv4/tcp_bic.c
index 645cc30..f5f588b 100644
--- a/net/ipv4/tcp_bic.c
+++ b/net/ipv4/tcp_bic.c
@@ -145,12 +145,13 @@ static void bictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked)
if (!tcp_is_cwnd_limited(sk))
return;
- if (tcp_in_slow_start(tp))
- tcp_slow_start(tp, acked);
- else {
- bictcp_update(ca, tp->snd_cwnd);
- tcp_cong_avoid_ai(tp, ca->cnt, 1);
+ if (tcp_in_slow_start(tp)) {
+ acked = tcp_slow_start(tp, acked);
+ if (!acked)
+ return;
}
+ bictcp_update(ca, tp->snd_cwnd);
+ tcp_cong_avoid_ai(tp, ca->cnt, acked);
}
/*
--
1.8.3.1
next prev parent reply other threads:[~2020-03-16 6:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-16 6:35 [PATCH RESEND net-next v2 0/5] tcp: fix stretch ACK bugs in congestion control modules Pengcheng Yang
2020-03-16 6:35 ` Pengcheng Yang [this message]
2020-03-16 21:19 ` [PATCH RESEND net-next v2 1/5] tcp: fix stretch ACK bugs in BIC Neal Cardwell
2020-03-16 6:35 ` [PATCH RESEND net-next v2 2/5] tcp: fix stretch ACK bugs in Scalable Pengcheng Yang
2020-03-16 21:25 ` Neal Cardwell
2020-03-16 6:35 ` [PATCH RESEND net-next v2 3/5] tcp: stretch ACK fixes in Veno prep Pengcheng Yang
2020-03-16 21:42 ` Neal Cardwell
2020-03-16 6:35 ` [PATCH RESEND net-next v2 4/5] tcp: fix stretch ACK bugs in Veno Pengcheng Yang
2020-03-16 21:46 ` Neal Cardwell
2020-03-16 6:35 ` [PATCH RESEND net-next v2 5/5] tcp: fix stretch ACK bugs in Yeah Pengcheng Yang
2020-03-17 1:27 ` [PATCH RESEND net-next v2 0/5] tcp: fix stretch ACK bugs in congestion control modules David Miller
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