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Differential D50891

tcp: provide sysctl for the maximum retransmission timeout
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Authored by glebius on Jun 16 2025, 11:52 PM.
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melifaro
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tuexen
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transport
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rG552d17804629: tcp: provide sysctl for the maximum retransmission timeout

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rG FreeBSD src repository
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Event Timeline

glebius created this revision.Jun 16 2025, 11:52 PM
Herald added 1 blocking reviewer(s): transport. · View Herald TranscriptJun 16 2025, 11:52 PM
Herald added subscribers: melifaro, imp. · View Herald Transcript
glebius requested review of this revision.Jun 16 2025, 11:52 PM
Harbormaster completed remote builds in B64925: Diff 157150.Jun 16 2025, 11:52 PM
glebius added a parent revision: D50890: tcp: remove CTLFLAG_NEEDGIANT from sysctl(9) handlers related to timers.Jun 16 2025, 11:52 PM
glebius added a child revision: D50892: snmp_mibII: use sysctl(3) to read min/max TCP retransmission timeouts.
tuexen added a comment.Jun 17 2025, 4:18 AM

You might also want to

  • describe rexmit_max in the entry describing rexmit_initial, rexmit_min, and rexmit_slop in share/man/man4/tcp.4.
  • use tcp_rexmit_max instead of TCPTV_REXMTMAX in sys/netinet/tcp_stacks/bbr.c.
  • use tcp_rexmit_max instead of TCPTV_REXMTMAX in sys/netinet/tcp_stacks/rack.c.
glebius updated this revision to Diff 157162.Jun 17 2025, 4:35 AM
  • Don't forget rack/bbr.
  • Document the new sysctl and improve paragraph.
Herald added a subscriber: ziaee. · View Herald TranscriptJun 17 2025, 4:35 AM
Harbormaster completed remote builds in B64933: Diff 157162.Jun 17 2025, 4:35 AM
tuexen accepted this revision.Jun 17 2025, 6:42 AM
This revision is now accepted and ready to land.Jun 17 2025, 6:42 AM
Closed by commit rG552d17804629: tcp: provide sysctl for the maximum retransmission timeout (authored by glebius). · Explain WhyJun 19 2025, 3:29 AM
This revision was automatically updated to reflect the committed changes.
glebius added a commit: rG552d17804629: tcp: provide sysctl for the maximum retransmission timeout.

Revision Contents
Changeset List

PathSize
share/
man/
man4/
14 lines
sys/
netinet/
4 lines
tcp_stacks/
2 lines
2 lines
4 lines
2 lines
1 line
8 lines

Diff 157297

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share/man/man4/tcp.4

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sys/netinet/tcp_input.c

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sys/netinet/tcp_stacks/bbr.c

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sys/netinet/tcp_stacks/rack.c

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sys/netinet/tcp_subr.c

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sys/netinet/tcp_syncache.c

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sys/netinet/tcp_timer.h

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sys/netinet/tcp_timer.c

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