From owner-svn-src-user@FreeBSD.ORG  Thu Feb  5 15:09:56 2009
Return-Path: <owner-svn-src-user@FreeBSD.ORG>
Delivered-To: svn-src-user@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 3D05010656ED;
	Thu,  5 Feb 2009 15:09:56 +0000 (UTC) (envelope-from dfr@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 6FB218FD44;
	Thu,  5 Feb 2009 15:09:42 +0000 (UTC) (envelope-from dfr@FreeBSD.org)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n15F9geo030371;
	Thu, 5 Feb 2009 15:09:42 GMT (envelope-from dfr@svn.freebsd.org)
Received: (from dfr@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id n15F9gCj030370;
	Thu, 5 Feb 2009 15:09:42 GMT (envelope-from dfr@svn.freebsd.org)
Message-Id: <200902051509.n15F9gCj030370@svn.freebsd.org>
From: Doug Rabson <dfr@FreeBSD.org>
Date: Thu, 5 Feb 2009 15:09:42 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
X-SVN-Group: user
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r188153 - user/dfr/xenhvm/6/sys/amd64/conf
X-BeenThere: svn-src-user@freebsd.org
X-Mailman-Version: 2.1.5
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/listinfo/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: Thu, 05 Feb 2009 15:10:15 -0000

Author: dfr
Date: Thu Feb  5 15:09:42 2009
New Revision: 188153
URL: http://svn.freebsd.org/changeset/base/188153

Log:
  Adaptive mutex spinning turns out to be very slightly slower on Xen, probably
  due to scheduling conflicts with other guests within the same hypervisor.

Modified:
  user/dfr/xenhvm/6/sys/amd64/conf/XENHVM

Modified: user/dfr/xenhvm/6/sys/amd64/conf/XENHVM
==============================================================================
--- user/dfr/xenhvm/6/sys/amd64/conf/XENHVM	Thu Feb  5 15:09:04 2009	(r188152)
+++ user/dfr/xenhvm/6/sys/amd64/conf/XENHVM	Thu Feb  5 15:09:42 2009	(r188153)
@@ -59,7 +59,8 @@ options 	SYSVMSG			# SYSV-style message 
 options 	SYSVSEM			# SYSV-style semaphores
 options 	_KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
 options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
-options 	ADAPTIVE_GIANT		# Giant mutex is adaptive.
+options		NO_ADAPTIVE_MUTEXES
+#options 	ADAPTIVE_GIANT		# Giant mutex is adaptive.
 
 options		KDB
 options		DDB
@@ -69,6 +70,7 @@ device		atpic			# 8259A compatability
 
 # Linux 32-bit ABI support
 options 	LINPROCFS		# Cannot be a module yet.
+options		SMP
 
 # Bus support.
 device		acpi