Date: Mon, 25 Aug 2025 06:13:49 GMT From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 6c45a5dad0a0 - main - tcp: improve inflating cwnd in limited transmit Message-ID: <202508250613.57P6DnaY013481@gitrepo.freebsd.org>
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The branch main has been updated by tuexen: URL: https://cgit.FreeBSD.org/src/commit/?id=6c45a5dad0a000b1fae452b6b1d17aee6857cf5c commit 6c45a5dad0a000b1fae452b6b1d17aee6857cf5c Author: Michael Tuexen <tuexen@FreeBSD.org> AuthorDate: 2025-08-25 06:08:46 +0000 Commit: Michael Tuexen <tuexen@FreeBSD.org> CommitDate: 2025-08-25 06:08:46 +0000 tcp: improve inflating cwnd in limited transmit Don't subtract tcp_sack_adjust() sometimes twice, just once in all cases. Reviewed by: rscheff Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D52140 --- sys/netinet/tcp_input.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index ec7102223c2d..d5dc516c28aa 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -2761,12 +2761,10 @@ enter_recovery: if ((tp->snd_nxt == tp->snd_max) && (tp->t_rxtshift == 0)) tp->snd_cwnd = - SEQ_SUB(tp->snd_nxt, - tp->snd_una) - - tcp_sack_adjust(tp); + SEQ_SUB(tp->snd_nxt, tp->snd_una); tp->snd_cwnd += - (tp->t_dupacks - tp->snd_limited) * - maxseg - tcp_sack_adjust(tp); + (tp->t_dupacks - tp->snd_limited) * maxseg; + tp->snd_cwnd -= tcp_sack_adjust(tp); /* * Only call tcp_output when there * is new data available to be sent
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