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To: "Kevin Oberman" <oberman@es.net>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 26 Nov 2003 10:51:36 PST."
             <20031126185136.562385D08@ptavv.es.net> 
Date: Wed, 26 Nov 2003 19:57:06 +0100
Message-ID: <47528.1069873026@critter.freebsd.dk>
cc: freebsd-current@freebsd.org
Subject: Re: 5.2-BETA: giving up on 4 buffers (ata) 
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In message <20031126185136.562385D08@ptavv.es.net>, "Kevin Oberman" writes:
>> Date: Wed, 26 Nov 2003 19:37:45 +0100
>> From: Matthias Andree <matthias.andree@gmx.de>
>> Sender: owner-freebsd-current@freebsd.org
>> 
>> Hi,
>> 
>> when I rebooted my 5.2-BETA (kernel about 24 hours old), it gave up on
>> flushing 4 dirty blocks.
>> 
>> I had three UFS1 softdep file systems mounted on one ATA drive, one ext2
>> file system on another ATA drive and one ext2 file system on a SCSI
>> drive.  Both ext2 file systems had been mounted read-only, so they can't
>> have had dirty blocks.
>> 
>> At the next reboot, FreeBSD checked all three UFS file systems as they
>> hadn't been umounted cleanly before. Makes me wonder if FreeBSD gave up
>> on the super blocks...
>
>This looks like a GEOM related issue, although I am not completely sure
>of this.

Why do you think it has anything to do with GEOM ?

When we give up on buffers, then superblocks are likely victims, in particular
when softupdates dependencies are involved.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.