From owner-svn-src-all@FreeBSD.ORG  Thu Jun 28 22:03:59 2012
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A41AD106566C;
	Thu, 28 Jun 2012 22:03:59 +0000 (UTC) (envelope-from alc@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 8E92E8FC0A;
	Thu, 28 Jun 2012 22:03:59 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q5SM3xC9001237;
	Thu, 28 Jun 2012 22:03:59 GMT (envelope-from alc@svn.freebsd.org)
Received: (from alc@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q5SM3xjj001235;
	Thu, 28 Jun 2012 22:03:59 GMT (envelope-from alc@svn.freebsd.org)
Message-Id: <201206282203.q5SM3xjj001235@svn.freebsd.org>
From: Alan Cox <alc@FreeBSD.org>
Date: Thu, 28 Jun 2012 22:03:59 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r237733 - head/sys/amd64/amd64
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 28 Jun 2012 22:03:59 -0000

Author: alc
Date: Thu Jun 28 22:03:59 2012
New Revision: 237733
URL: http://svn.freebsd.org/changeset/base/237733

Log:
  Avoid some unnecessary PV list locking in pmap_enter().

Modified:
  head/sys/amd64/amd64/pmap.c

Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c	Thu Jun 28 21:24:56 2012	(r237732)
+++ head/sys/amd64/amd64/pmap.c	Thu Jun 28 22:03:59 2012	(r237733)
@@ -3570,7 +3570,7 @@ validate:
 				if ((newpte & PG_RW) == 0)
 					invlva = TRUE;
 			}
-			if ((origpte & PG_MANAGED) != 0) {
+			if ((om->aflags & PGA_WRITEABLE) != 0) {
 				CHANGE_PV_LIST_LOCK_TO_VM_PAGE(&lock, om);
 				if (TAILQ_EMPTY(&om->md.pv_list) &&
 				    ((om->flags & PG_FICTITIOUS) != 0 ||