From owner-freebsd-stable@FreeBSD.ORG  Fri Jun 10 15:05:26 2005
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@FreeBSD.org
Delivered-To: freebsd-stable@FreeBSD.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 05EBE16A41C;
	Fri, 10 Jun 2005 15:05:26 +0000 (GMT)
	(envelope-from ssouhlal@FreeBSD.org)
Received: from efnet-math.org (efnet-math.org [69.60.109.125])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 8815E43D1D;
	Fri, 10 Jun 2005 15:05:25 +0000 (GMT)
	(envelope-from ssouhlal@FreeBSD.org)
Received: from [128.173.145.200] (h80ad91c8.dhcp.vt.edu [128.173.145.200])
	(authenticated bits=0)
	by efnet-math.org (8.13.1/8.13.1) with ESMTP id j5AF5BTU018811
	(version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NO);
	Fri, 10 Jun 2005 11:05:12 -0400
In-Reply-To: <1118375433.694.1.camel@spirit>
References: <20050610042211.5d214150.jylefort@FreeBSD.org>
	<365EB646-B593-4038-9525-D0CC3C00D691@FreeBSD.org>
	<1118375433.694.1.camel@spirit>
Mime-Version: 1.0 (Apple Message framework v730)
Content-Type: text/plain; charset=UTF-8; delsp=yes; format=flowed
Message-Id: <1634E29D-2A30-477E-A759-991498D404CE@FreeBSD.org>
Content-Transfer-Encoding: quoted-printable
From: Suleiman Souhlal <ssouhlal@FreeBSD.org>
Date: Fri, 10 Jun 2005 11:05:00 -0400
To: Xin LI <delphij@delphij.net>
X-Mailer: Apple Mail (2.730)
Cc: Jean-Yves Lefort <jylefort@FreeBSD.org>,
	freebsd-stable <freebsd-stable@FreeBSD.org>, Xin LI <delphij@FreeBSD.org>
Subject: Re: UFS2 partition with negative used space
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 10 Jun 2005 15:05:26 -0000

Hi,

On Jun 9, 2005, at 11:50 PM, Xin LI wrote:

> Hi, Suleiman,
>
> =E5=9C=A8 2005-06-09=E5=9B=9B=E7=9A=84 23:35 -0400=EF=BC=8CSuleiman =
Souhlal=E5=86=99=E9=81=93=EF=BC=9A
>
>> Hi,
>>
> [...]
>
>> It used to be recomputed by the kernel at mount time if the
>> filesystem was dirty, but delphij changed it so that background fsck
>> recomputes it instead. For some reason, in this case, this wasn't
>> enough to synchronize the superblock's cg summary with the actual
>> summary stored in the cgs. I'll have to investigate some more.
>>
>
> Will setting vfs.ffs.compute_summary_at_mount=3D1 before mounting the
> volume help the situation?

Unfortunately, we didn't try that (well, we actually did, but I =20
forgot to tell Jean-Yves to make sure his volume was dirty before =20
mounting it).

--
Suleiman Souhlal     | ssouhlal@vt.edu
The FreeBSD Project  | ssouhlal@FreeBSD.org