CVS commit: src/sys/netinet
"Kevin Bowling" <[email protected]>
| Newsgroups | gmane.os.netbsd.devel.cvs |
|---|---|
| Message-ID | <[email protected]> |
Module Name: src Committed By: kbowling Date: Wed May 20 21:12:36 UTC 2026 Modified Files: src/sys/netinet: tcp_subr.c tcp_timer.h Log Message: tcp: set initial RTO to 1s per RFC 6298 Lower TCPTV_SRTTDFLT from 3s to 1s and adjust the t_rttvar seed in tcp_tcpcb_template() so the pre-measurement TCP_REXMTVAL() equals TCPTV_SRTTDFLT (was 2*TCPTV_SRTTDFLT). Active opens and SYN|ACK retransmits now start at 1s and back off 1, 2, 4, ... per RFC 6298 sections 2.1 and 5.5. Post-first-sample RTO is unchanged. Pin tcp_msl_remote_threshold to its previous numeric default (3*PR_SLOWHZ) so the SRTTDFLT change does not move an unrelated TIME_WAIT-shortening tunable. This is conceptually https://reviews.freebsd.org/D18941 which we ran at a large CDN, modified for NetBSD's stack. To generate a diff of this commit: cvs rdiff -u -r1.299 -r1.300 src/sys/netinet/tcp_subr.c cvs rdiff -u -r1.30 -r1.31 src/sys/netinet/tcp_timer.h Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.