diff options
| author | Pengcheng Yang <yangpc@wangsu.com> | 2020-03-16 14:35:10 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-16 18:26:55 -0700 |
| commit | ca04f5d4bb79ef22b708ebb8ab147fc5abb25300 (patch) | |
| tree | f7581ecc8d34788c98d3ba1cec730f9599f8dc5e /net/ipv4 | |
| parent | d861b5c7534e12590e731433304d87b453c3613f (diff) | |
| download | linux-ca04f5d4bb79ef22b708ebb8ab147fc5abb25300.tar.bz2 | |
tcp: fix stretch ACK bugs in Veno
Change Veno 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>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp_veno.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/ipv4/tcp_veno.c b/net/ipv4/tcp_veno.c index 857491c5b856..50a9a6e2c4cd 100644 --- a/net/ipv4/tcp_veno.c +++ b/net/ipv4/tcp_veno.c @@ -154,8 +154,9 @@ static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, u32 acked) if (tcp_in_slow_start(tp)) { /* Slow start. */ - tcp_slow_start(tp, acked); - goto done; + acked = tcp_slow_start(tp, acked); + if (!acked) + goto done; } /* Congestion avoidance. */ @@ -163,7 +164,7 @@ static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, u32 acked) /* In the "non-congestive state", increase cwnd * every rtt. */ - tcp_cong_avoid_ai(tp, tp->snd_cwnd, 1); + tcp_cong_avoid_ai(tp, tp->snd_cwnd, acked); } else { /* In the "congestive state", increase cwnd * every other rtt. @@ -177,7 +178,7 @@ static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, u32 acked) veno->inc = 1; tp->snd_cwnd_cnt = 0; } else - tp->snd_cwnd_cnt++; + tp->snd_cwnd_cnt += acked; } done: if (tp->snd_cwnd < 2) |