From owner-svn-src-head@FreeBSD.ORG  Sun May 15 17:12:29 2011
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 9DBF0106566B;
	Sun, 15 May 2011 17:12:29 +0000 (UTC)
	(envelope-from marcel@xcllnt.net)
Received: from mail.xcllnt.net (mail.xcllnt.net [70.36.220.4])
	by mx1.freebsd.org (Postfix) with ESMTP id 6986B8FC08;
	Sun, 15 May 2011 17:12:29 +0000 (UTC)
Received: from [10.75.44.147] (wsp04373635wss.cr.net.cable.rogers.com
	[24.235.98.20]) (authenticated bits=0)
	by mail.xcllnt.net (8.14.4/8.14.4) with ESMTP id p4FHCMwm087663
	(version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO);
	Sun, 15 May 2011 10:12:27 -0700 (PDT)
	(envelope-from marcel@xcllnt.net)
Mime-Version: 1.0 (Apple Message framework v1084)
Content-Type: text/plain; charset=us-ascii
From: Marcel Moolenaar <marcel@xcllnt.net>
In-Reply-To: <E2746EF4-47DD-48F7-A255-4BAF83736A5F@xcllnt.net>
Date: Sun, 15 May 2011 13:12:17 -0400
Content-Transfer-Encoding: 7bit
Message-Id: <9D0B1F3A-27C1-4CB8-B619-FF4C5F199802@xcllnt.net>
References: <201105151145.p4FBjDVR038539@svn.freebsd.org>
	<7B2294F7-8383-42F2-8127-759DBCD3540A@xcllnt.net>
	<4DCFF0D5.3080309@FreeBSD.org>
	<E2746EF4-47DD-48F7-A255-4BAF83736A5F@xcllnt.net>
To: Marcel Moolenaar <marcel@xcllnt.net>
X-Mailer: Apple Mail (2.1084)
Cc: svn-src-head@FreeBSD.org, "Andrey V. Elsukov" <ae@FreeBSD.org>,
	svn-src-all@FreeBSD.org, src-committers@FreeBSD.org
Subject: Re: svn commit: r221952 - head/sbin/geom/class/part
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: Sun, 15 May 2011 17:12:29 -0000


On May 15, 2011, at 12:59 PM, Marcel Moolenaar wrote:
> 
> /* ... paging in non-commit details ... */
> 
> The point is that this is what's happening *now*. This is not
> what happened before. With support for logical partitions (i.e.
> the EBR scheme), the total partition bounds and the effective
> usable space are not the same. This is because the partition
> starts with an MBR look-alike. The usable space is therefore
> 1 sector less and start at offset 1 (0-based) from the start
> of the partition.

/* ... compensate for data poisoning while paging in ... */

The usable space starts a *track* from the beginning of the
partition as per standard MBR rules. Not 1 sector in...

-- 
Marcel Moolenaar
marcel@xcllnt.net