diff options
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 389d1b340248..fb3a7750f623 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -2546,7 +2546,7 @@ static bool tcp_try_undo_loss(struct sock *sk, bool frto_undo) * 1) If the packets in flight is larger than ssthresh, PRR spreads the * cwnd reductions across a full RTT. * 2) Otherwise PRR uses packet conservation to send as much as delivered. - * But when the retransmits are acked without further losses, PRR + * But when SND_UNA is acked without further losses, * slow starts cwnd up to ssthresh to speed up the recovery. */ static void tcp_init_cwnd_reduction(struct sock *sk) @@ -2563,7 +2563,7 @@ static void tcp_init_cwnd_reduction(struct sock *sk) tcp_ecn_queue_cwr(tp); } -void tcp_cwnd_reduction(struct sock *sk, int newly_acked_sacked, int flag) +void tcp_cwnd_reduction(struct sock *sk, int newly_acked_sacked, int newly_lost, int flag) { struct tcp_sock *tp = tcp_sk(sk); int sndcnt = 0; @@ -2577,8 +2577,7 @@ void tcp_cwnd_reduction(struct sock *sk, int newly_acked_sacked, int flag) u64 dividend = (u64)tp->snd_ssthresh * tp->prr_delivered + tp->prior_cwnd - 1; sndcnt = div_u64(dividend, tp->prior_cwnd) - tp->prr_out; - } else if ((flag & (FLAG_RETRANS_DATA_ACKED | FLAG_LOST_RETRANS)) == - FLAG_RETRANS_DATA_ACKED) { + } else if (flag & FLAG_SND_UNA_ADVANCED && !newly_lost) { sndcnt = min_t(int, delta, max_t(int, tp->prr_delivered - tp->prr_out, newly_acked_sacked) + 1); @@ -3419,7 +3418,7 @@ static void tcp_cong_control(struct sock *sk, u32 ack, u32 acked_sacked, if (tcp_in_cwnd_reduction(sk)) { /* Reduce cwnd if state mandates */ - tcp_cwnd_reduction(sk, acked_sacked, flag); + tcp_cwnd_reduction(sk, acked_sacked, rs->losses, flag); } else if (tcp_may_raise_cwnd(sk, flag)) { /* Advance cwnd if state allows */ tcp_cong_avoid(sk, ack, acked_sacked); |