git: tcp: Reduce minimum retransmit timeout to 190ms.

[Sepherosa Ziehau]

commit 2cd543d53375eb2f2f86d91dc695d4d83ef78625
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Fri Jun 23 06:06:31 2017 +0800

    tcp: Reduce minimum retransmit timeout to 190ms.
    
    Increase retransmit timeout slop to ~160ms and reduce TCPTV_MIN
    to ~30ms.  Bring in dillon's comment about TCPTV_MIN reduction
    and retransmit timeout slop from FreeBSD.  And make sure that
    tcp_rexmit_min is valid for a low kern.hz setting.

Summary of changes:
 sys/netinet/tcp_subr.c  |  2 ++
 sys/netinet/tcp_timer.h | 28 +++++++++++++++++++---------
 2 files changed, 21 insertions(+), 9 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/2cd543d53375eb2f2f86d91dc695d4d83ef78625


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