From owner-svn-src-all@FreeBSD.ORG  Sat Jul 30 20:01:38 2011
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 641FA106564A;
	Sat, 30 Jul 2011 20:01:38 +0000 (UTC) (envelope-from jhb@FreeBSD.org)
Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42])
	by mx1.freebsd.org (Postfix) with ESMTP id 3A10A8FC0A;
	Sat, 30 Jul 2011 20:01:38 +0000 (UTC)
Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net
	[66.111.2.69])
	by cyrus.watson.org (Postfix) with ESMTPSA id DCCC546B1A;
	Sat, 30 Jul 2011 16:01:37 -0400 (EDT)
Received: from [192.168.1.55] (c-68-36-150-83.hsd1.nj.comcast.net
	[68.36.150.83])
	by bigwig.baldwin.cx (Postfix) with ESMTPSA id 630778A02C;
	Sat, 30 Jul 2011 16:01:37 -0400 (EDT)
Mime-Version: 1.0 (Apple Message framework v1084)
Content-Type: text/plain; charset=us-ascii
From: John Baldwin <jhb@FreeBSD.org>
In-Reply-To: <201107301333.p6UDX5ca001997@svn.freebsd.org>
Date: Sat, 30 Jul 2011 16:01:36 -0400
Content-Transfer-Encoding: quoted-printable
Message-Id: <D7B5C4D2-350D-43FA-9E40-DCE166281F7D@FreeBSD.org>
References: <201107301333.p6UDX5ca001997@svn.freebsd.org>
To: Bjoern A. Zeeb <bz@FreeBSD.org>
X-Mailer: Apple Mail (2.1084)
X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.6
	(bigwig.baldwin.cx); Sat, 30 Jul 2011 16:01:37 -0400 (EDT)
Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org
Subject: Re: svn commit: r224516 - in head/sys: amd64/amd64 i386/i386
	pc98/pc98
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: Sat, 30 Jul 2011 20:01:38 -0000


On Jul 30, 2011, at 9:33 AM, Bjoern A. Zeeb wrote:

> Author: bz
> Date: Sat Jul 30 13:33:05 2011
> New Revision: 224516
> URL: http://svn.freebsd.org/changeset/base/224516
>=20
> Log:
>  Introduce a tunable to disable the time consuming parts of bootup
>  memtesting, which can easily save seconds to minutes of boot time.
>  The tunable name is kept general to allow reusing the code in
>  alternate frameworks.

Why the 'tmpul' variable?  The TUNABLE_*_FETCH() macros will not modify =
the parameter
if the environment variable is missing or unparseable.  Lots of places =
depend on this all over
the kernel already, so you can depend on it here.

--=20
John Baldwin