On 06/26/2018 07:34 PM, Lawrence Brakmo wrote:
> When using dctcp and doing RPCs, if the last packet of a request is
> ECN marked as having seen congestion (CE), the sender can decrease its
> cwnd to 1. As a result, it will only send one packet when a new request
> is sent. In some instances this results in high tail latencies.
>
> }
> /* Force a fast retransmit upon entering fast recovery */
> sndcnt = max(sndcnt, (tp->prr_out ? 0 : 1));
> - tp->snd_cwnd = tcp_packets_in_flight(tp) + sndcnt;
> + tp->snd_cwnd = max((int)tcp_packets_in_flight(tp) + sndcnt, 2);
Canonical way is to use min_t(), please respin (no need to explain this trivia
in changelog)
Thanks.
