svn commit: r254789 - releng/9.2/sys/netinet

[Glen Barber]

Author: gjb
Date: Sat Aug 24 15:09:05 2013
New Revision: 254789
URL: http://svnweb.freebsd.org/changeset/base/254789

Log:
  Default net.inet.tcp.experimental.initcwnd10 to 0 in releng/9.2.
  
  Concerns have been raised regarding enabling initcwnd10 by default
  in the stable/ branch, so as a cautionary measure, turn this off
  for the 9.2-RELEASE.  This sysctl is still available for those
  who want to enable this on their own systems.
  
  This is a direct commit to releng/9.2.
  
  Discussed with:	re
  Approved by:	re (marius)

Modified:
  releng/9.2/sys/netinet/tcp_input.c

Modified: releng/9.2/sys/netinet/tcp_input.c
==============================================================================
--- releng/9.2/sys/netinet/tcp_input.c	Sat Aug 24 14:49:51 2013	(r254788)
+++ releng/9.2/sys/netinet/tcp_input.c	Sat Aug 24 15:09:05 2013	(r254789)
@@ -161,7 +161,7 @@ SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO,
 SYSCTL_NODE(_net_inet_tcp, OID_AUTO, experimental, CTLFLAG_RW, 0,
     "Experimental TCP extensions");
 
-VNET_DEFINE(int, tcp_do_initcwnd10) = 1;
+VNET_DEFINE(int, tcp_do_initcwnd10) = 0;
 SYSCTL_VNET_INT(_net_inet_tcp_experimental, OID_AUTO, initcwnd10, CTLFLAG_RW,
     &VNET_NAME(tcp_do_initcwnd10), 0,
     "Enable draft-ietf-tcpm-initcwnd-05 (Increasing initial CWND to 10)");