svn commit: r216103 - head/sys/netinet

[Lawrence Stewart]

Author: lstewart
Date: Thu Dec  2 01:01:37 2010
New Revision: 216103
URL: http://svn.freebsd.org/changeset/base/216103

Log:
  Set ssthresh appropriately on RTO. This change was accidentally not ported from
  the pre modular CC stack.
  
  Sponsored by:	FreeBSD Foundation
  Submitted by:	David Hayes <dahayes at swin edu au>
  MFC after:	9 weeks
  X-MFC with:	r215166

Modified:
  head/sys/netinet/tcp_input.c

Modified: head/sys/netinet/tcp_input.c
==============================================================================
--- head/sys/netinet/tcp_input.c	Thu Dec  2 00:49:02 2010	(r216102)
+++ head/sys/netinet/tcp_input.c	Thu Dec  2 01:01:37 2010	(r216103)
@@ -378,6 +378,8 @@ cc_cong_signal(struct tcpcb *tp, struct 
 		tp->t_dupacks = 0;
 		tp->t_bytes_acked = 0;
 		EXIT_RECOVERY(tp->t_flags);
+		tp->snd_ssthresh = max(2, min(tp->snd_wnd, tp->snd_cwnd) / 2 /
+		    tp->t_maxseg) * tp->t_maxseg;
 		tp->snd_cwnd = tp->t_maxseg;
 		break;
 	case CC_RTO_ERR: