From owner-svn-src-stable-9@FreeBSD.ORG  Wed Jan 18 04:34:19 2012
Return-Path: <owner-svn-src-stable-9@FreeBSD.ORG>
Delivered-To: svn-src-stable-9@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 8D67C106566C;
	Wed, 18 Jan 2012 04:34:19 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 77E988FC19;
	Wed, 18 Jan 2012 04:34:19 +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 q0I4YJ8k022443;
	Wed, 18 Jan 2012 04:34:19 GMT (envelope-from kib@svn.freebsd.org)
Received: (from kib@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q0I4YJ6X022441;
	Wed, 18 Jan 2012 04:34:19 GMT (envelope-from kib@svn.freebsd.org)
Message-Id: <201201180434.q0I4YJ6X022441@svn.freebsd.org>
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Wed, 18 Jan 2012 04:34:19 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org
X-SVN-Group: stable-9
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r230297 - stable/9/sys/vm
X-BeenThere: svn-src-stable-9@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for only the 9-stable src tree
	<svn-src-stable-9.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-9>, 
	<mailto:svn-src-stable-9-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable-9>
List-Post: <mailto:svn-src-stable-9@freebsd.org>
List-Help: <mailto:svn-src-stable-9-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-9>, 
	<mailto:svn-src-stable-9-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 18 Jan 2012 04:34:19 -0000

Author: kib
Date: Wed Jan 18 04:34:18 2012
New Revision: 230297
URL: http://svn.freebsd.org/changeset/base/230297

Log:
  MFC r229495:
  Do not restart the scan in vm_object_page_clean() on the object
  generation change if requested mode is async.

Modified:
  stable/9/sys/vm/vm_object.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/vm/vm_object.c
==============================================================================
--- stable/9/sys/vm/vm_object.c	Wed Jan 18 04:12:32 2012	(r230296)
+++ stable/9/sys/vm/vm_object.c	Wed Jan 18 04:34:18 2012	(r230297)
@@ -840,8 +840,12 @@ rescan:
 		if (p->valid == 0)
 			continue;
 		if (vm_page_sleep_if_busy(p, TRUE, "vpcwai")) {
-			if (object->generation != curgeneration)
-				goto rescan;
+			if (object->generation != curgeneration) {
+				if ((flags & OBJPC_SYNC) != 0)
+					goto rescan;
+				else
+					clearobjflags = 0;
+			}
 			np = vm_page_find_least(object, pi);
 			continue;
 		}
@@ -850,8 +854,12 @@ rescan:
 
 		n = vm_object_page_collect_flush(object, p, pagerflags,
 		    flags, &clearobjflags);
-		if (object->generation != curgeneration)
-			goto rescan;
+		if (object->generation != curgeneration) {
+			if ((flags & OBJPC_SYNC) != 0)
+				goto rescan;
+			else
+				clearobjflags = 0;
+		}
 
 		/*
 		 * If the VOP_PUTPAGES() did a truncated write, so