From owner-cvs-all@FreeBSD.ORG  Fri Aug  6 02:08:32 2004
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id F305F16A4CE; Fri,  6 Aug 2004 02:08:31 +0000 (GMT)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id D296A43D5A; Fri,  6 Aug 2004 02:08:31 +0000 (GMT)
	(envelope-from rwatson@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.12.11/8.12.11) with ESMTP id i7628VYG093424;
	Fri, 6 Aug 2004 02:08:31 GMT
	(envelope-from rwatson@repoman.freebsd.org)
Received: (from rwatson@localhost)
	by repoman.freebsd.org (8.12.11/8.12.11/Submit) id i7628VK6093423;
	Fri, 6 Aug 2004 02:08:31 GMT
	(envelope-from rwatson)
Message-Id: <200408060208.i7628VK6093423@repoman.freebsd.org>
From: Robert Watson <rwatson@FreeBSD.org>
Date: Fri, 6 Aug 2004 02:08:31 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/netinet udp_usrreq.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 06 Aug 2004 02:08:32 -0000

rwatson     2004-08-06 02:08:31 UTC

  FreeBSD src repository

  Modified files:
    sys/netinet          udp_usrreq.c 
  Log:
  When iterating the UDP inpcb list processing an inbound broadcast
  or multicast packet, we don't need to acquire the inpcb mutex
  unless we are actually using inpcb fields other than the bound port
  and address.  Since we hold the pcbinfo lock already, these can't
  change.  Defer acquiring the inpcb mutex until we have a high
  chance of a match.  This avoids about 120 mutex operations per UDP
  broadcast packet received on one of my work systems.
  
  Reviewed by:    sam
  
  Revision  Changes    Path
  1.158     +9 -10     src/sys/netinet/udp_usrreq.c