The branch main has been updated by rscheff: URL: https://cgit.FreeBSD.org/src/commit/?id=b9f803b7d4b7ee3799ab94f66c02c3b6e58c153a
commit b9f803b7d4b7ee3799ab94f66c02c3b6e58c153a Author: Richard Scheffenegger <[email protected]> AuthorDate: 2021-03-26 01:05:22 +0000 Commit: Richard Scheffenegger <[email protected]> CommitDate: 2021-03-26 01:06:15 +0000 tcp: Use PRR for ECN congestion recovery MFC after: 2 weeks Reviewed By: #transport, rrs Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D28972 --- sys/netinet/tcp_input.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 7c291eaec633..57779de1759a 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -2786,6 +2786,16 @@ resume_partialack: tcp_newreno_partial_ack(tp, th); } else cc_post_recovery(tp, th); + } else if (IN_CONGRECOVERY(tp->t_flags)) { + if (SEQ_LT(th->th_ack, tp->snd_recover)) { + if (V_tcp_do_prr) { + tp->sackhint.delivered_data = BYTES_THIS_ACK(tp, th); + tp->snd_fack = th->th_ack; + tcp_do_prr_ack(tp, th); + (void) tcp_output(tp); + } + } else + cc_post_recovery(tp, th); } /* * If we reach this point, ACK is not a duplicate, @@ -3954,8 +3964,12 @@ tcp_do_prr_ack(struct tcpcb *tp, struct tcphdr *th) * If there is going to be a SACK retransmission, adjust snd_cwnd * accordingly. */ - tp->snd_cwnd = imax(maxseg, tp->snd_nxt - tp->snd_recover + - tp->sackhint.sack_bytes_rexmit + (snd_cnt * maxseg)); + if (IN_FASTRECOVERY(tp->t_flags)) { + tp->snd_cwnd = imax(maxseg, tp->snd_nxt - tp->snd_recover + + tp->sackhint.sack_bytes_rexmit + (snd_cnt * maxseg)); + } else if (IN_CONGRECOVERY(tp->t_flags)) + tp->snd_cwnd = imax(maxseg, pipe - del_data + + (snd_cnt * maxseg)); } /* _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-all To unsubscribe, send any mail to "[email protected]"
