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From: Lawrence Stewart <lstewart@FreeBSD.org>
Date: Mon, 10 Jan 2011 06:12:01 +0000 (UTC)
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Subject: svn commit: r217221 - head/sys/netinet
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Author: lstewart
Date: Mon Jan 10 06:12:01 2011
New Revision: 217221
URL: http://svn.freebsd.org/changeset/base/217221

Log:
  Reset the last_sack_ack SACK hint for TCP input processing to ensure that the
  hint is 0 when no SACK data is received to update the hint with. This was
  accidentally omitted from r216753.
  
  Sponsored by:	FreeBSD Foundation
  MFC after:	10 weeks
  X-MFC with:	216753

Modified:
  head/sys/netinet/tcp_input.c

Modified: head/sys/netinet/tcp_input.c
==============================================================================
--- head/sys/netinet/tcp_input.c	Mon Jan 10 05:13:06 2011	(r217220)
+++ head/sys/netinet/tcp_input.c	Mon Jan 10 06:12:01 2011	(r217221)
@@ -1291,6 +1291,7 @@ tcp_do_segment(struct mbuf *m, struct tc
 	short ostate = 0;
 #endif
 	thflags = th->th_flags;
+	tp->sackhint.last_sack_ack = 0;
 
 	/*
 	 * If this is either a state-changing packet or current state isn't