From owner-svn-src-head@FreeBSD.ORG  Tue Sep 18 20:28:56 2012
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 01BE8106566B;
	Tue, 18 Sep 2012 20:28:56 +0000 (UTC)
	(envelope-from glebius@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id E28298FC0A;
	Tue, 18 Sep 2012 20:28:55 +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 q8IKStfM056966;
	Tue, 18 Sep 2012 20:28:55 GMT (envelope-from glebius@svn.freebsd.org)
Received: (from glebius@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q8IKStPK056964;
	Tue, 18 Sep 2012 20:28:55 GMT (envelope-from glebius@svn.freebsd.org)
Message-Id: <201209182028.q8IKStPK056964@svn.freebsd.org>
From: Gleb Smirnoff <glebius@FreeBSD.org>
Date: Tue, 18 Sep 2012 20:28:55 +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: r240676 - head/sys/vm
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
	<svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 18 Sep 2012 20:28:56 -0000

Author: glebius
Date: Tue Sep 18 20:28:55 2012
New Revision: 240676
URL: http://svn.freebsd.org/changeset/base/240676

Log:
  If caller specifies UMA_ZONE_OFFPAGE explicitly, then do not waste memory
  in an allocation for a slab.
  
  Reviewed by:	jeff

Modified:
  head/sys/vm/uma_core.c

Modified: head/sys/vm/uma_core.c
==============================================================================
--- head/sys/vm/uma_core.c	Tue Sep 18 20:28:01 2012	(r240675)
+++ head/sys/vm/uma_core.c	Tue Sep 18 20:28:55 2012	(r240676)
@@ -1127,7 +1127,9 @@ keg_small_init(uma_keg_t keg)
 	keg->uk_rsize = rsize;
 	keg->uk_ppera = 1;
 
-	if (keg->uk_flags & UMA_ZONE_REFCNT) {
+	if (keg->uk_flags & UMA_ZONE_OFFPAGE) {
+		shsize = 0;
+	} else if (keg->uk_flags & UMA_ZONE_REFCNT) {
 		rsize += UMA_FRITMREF_SZ;	/* linkage & refcnt */
 		shsize = sizeof(struct uma_slab_refcnt);
 	} else {