diff options
| author |   Yuchung Cheng <ycheng@google.com> | 2016-02-02 10:33:08 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-02-07 14:09:51 -0500 |
| commit | 2d14a4def4fc87cb2d2712f7841b45189d75e301 (patch) | |
| tree | 8e5f7990136533c684af4243a2da66a233f72721 | |
| parent | tcp: refactor pkts acked accounting (diff) | |
| download | linux-dev-2d14a4def4fc87cb2d2712f7841b45189d75e301.tar.xz linux-dev-2d14a4def4fc87cb2d2712f7841b45189d75e301.zip | |
tcp: make congestion control more robust against reordering
This change enables congestion control to update cwnd based on
not only packet cumulatively acked but also packets delivered
out-of-order. This makes congestion control robust against packet
reordering because it may raise cwnd as long as packets are being
delivered once reordering has been detected (i.e., it only cares
the amount of packets delivered, not the ordering among them).
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/tcp_input.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 40824b380ef8..d598ff408cb9 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3660,7 +3660,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) tcp_cwnd_reduction(sk, acked_sacked, flag); } else if (tcp_may_raise_cwnd(sk, flag)) { /* Advance cwnd if state allows */ - tcp_cong_avoid(sk, ack, acked); + tcp_cong_avoid(sk, ack, acked_sacked); } if ((flag & FLAG_FORWARD_PROGRESS) || !(flag & FLAG_NOT_DUP)) { |