From owner-p4-projects@FreeBSD.ORG  Mon Apr 17 18:58:40 2006
Return-Path: <owner-p4-projects@FreeBSD.ORG>
X-Original-To: p4-projects@freebsd.org
Delivered-To: p4-projects@freebsd.org
Received: by hub.freebsd.org (Postfix, from userid 32767)
	id 16B6D16A404; Mon, 17 Apr 2006 18:58:40 +0000 (UTC)
X-Original-To: perforce@freebsd.org
Delivered-To: perforce@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id D1FAF16A400
	for <perforce@freebsd.org>; Mon, 17 Apr 2006 18:58:39 +0000 (UTC)
	(envelope-from tkuik@freefall.freebsd.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 9DB5F43D48
	for <perforce@freebsd.org>; Mon, 17 Apr 2006 18:58:39 +0000 (GMT)
	(envelope-from tkuik@freefall.freebsd.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.1/8.13.1) with ESMTP id k3HIwdRK090100
	for <perforce@freebsd.org>; Mon, 17 Apr 2006 18:58:39 GMT
	(envelope-from tkuik@freefall.freebsd.org)
Received: (from perforce@localhost)
	by repoman.freebsd.org (8.13.1/8.13.1/Submit) id k3HIwdbm090093
	for perforce@freebsd.org; Mon, 17 Apr 2006 18:58:39 GMT
	(envelope-from tkuik@freefall.freebsd.org)
Date: Mon, 17 Apr 2006 18:58:39 GMT
Message-Id: <200604171858.k3HIwdbm090093@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: perforce set sender to
	tkuik@freefall using -f
From: tkuik <tkuik@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Cc: 
Subject: PERFORCE change 95433 for review
X-BeenThere: p4-projects@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: p4 projects tree changes <p4-projects.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/p4-projects>
List-Post: <mailto:p4-projects@freebsd.org>
List-Help: <mailto:p4-projects-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 17 Apr 2006 18:58:40 -0000

http://perforce.freebsd.org/chv.cgi?CH=95433

Change 95433 by tkuik@tkuik_freebsd on 2006/04/17 18:58:32

	Added memory barrier definitions; fixes networking lock-up
	Submitted by:	Tim Kuik

Affected files ...

.. //depot/projects/xen3/src/sys/i386-xen/include/xen-os.h#4 edit

Differences ...

==== //depot/projects/xen3/src/sys/i386-xen/include/xen-os.h#4 (text+ko) ====

@@ -148,9 +148,9 @@
 #define spin_unlock_irqrestore mtx_unlock_irqrestore
 
 
-#define mb()
-#define rmb()
-#define wmb()
+#define mb() __asm__ __volatile__("lock; addl $0, 0(%%esp)": : :"memory")
+#define rmb() mb()
+#define wmb() barrier()
 #ifdef SMP
 #define smp_mb() mb() 
 #define smp_rmb() rmb()