From owner-svn-src-user@FreeBSD.ORG  Sun Mar  3 20:37:27 2013
Return-Path: <owner-svn-src-user@FreeBSD.ORG>
Delivered-To: svn-src-user@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id CEAA9BAB;
 Sun,  3 Mar 2013 20:37:27 +0000 (UTC) (envelope-from alc@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org
 [IPv6:2001:1900:2254:2068::e6a:0])
 by mx1.freebsd.org (Postfix) with ESMTP id B82878A8;
 Sun,  3 Mar 2013 20:37:27 +0000 (UTC)
Received: from svn.freebsd.org ([127.0.1.70])
 by svn.freebsd.org (8.14.5/8.14.5) with ESMTP id r23KbRD6077563;
 Sun, 3 Mar 2013 20:37:27 GMT (envelope-from alc@svn.freebsd.org)
Received: (from alc@localhost)
 by svn.freebsd.org (8.14.5/8.14.5/Submit) id r23KbRuX077562;
 Sun, 3 Mar 2013 20:37:27 GMT (envelope-from alc@svn.freebsd.org)
Message-Id: <201303032037.r23KbRuX077562@svn.freebsd.org>
From: Alan Cox <alc@FreeBSD.org>
Date: Sun, 3 Mar 2013 20:37:27 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
Subject: svn commit: r247731 - user/attilio/vmc-playground/sys/vm
X-SVN-Group: user
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-user@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: "SVN commit messages for the experimental &quot; user&quot;
 src tree" <svn-src-user.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/svn-src-user>,
 <mailto:svn-src-user-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-user>
List-Post: <mailto:svn-src-user@freebsd.org>
List-Help: <mailto:svn-src-user-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-user>,
 <mailto:svn-src-user-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 03 Mar 2013 20:37:27 -0000

Author: alc
Date: Sun Mar  3 20:37:27 2013
New Revision: 247731
URL: http://svnweb.freebsd.org/changeset/base/247731

Log:
  We don't need to reinitialize the root of the page cache trie on every
  vm object allocation.  We can, instead, rely on the type stability of
  the vm object zone.  (Note that we already assert that the page cache
  trie is empty in the vm object zone destructor.)
  
  Sponsored by:	EMC / Isilon Storage Division

Modified:
  user/attilio/vmc-playground/sys/vm/vm_object.c

Modified: user/attilio/vmc-playground/sys/vm/vm_object.c
==============================================================================
--- user/attilio/vmc-playground/sys/vm/vm_object.c	Sun Mar  3 20:10:56 2013	(r247730)
+++ user/attilio/vmc-playground/sys/vm/vm_object.c	Sun Mar  3 20:37:27 2013	(r247731)
@@ -203,6 +203,7 @@ vm_object_zinit(void *mem, int size, int
 	object->paging_in_progress = 0;
 	object->resident_page_count = 0;
 	object->shadow_count = 0;
+	object->cache.rt_root = 0;
 	return (0);
 }
 
@@ -249,7 +250,6 @@ _vm_object_allocate(objtype_t type, vm_p
 #if VM_NRESERVLEVEL > 0
 	LIST_INIT(&object->rvq);
 #endif
-	object->cache.rt_root = 0;
 
 	mtx_lock(&vm_object_list_mtx);
 	TAILQ_INSERT_TAIL(&vm_object_list, object, object_list);