Date: Wed, 26 Nov 2003 20:03:26 +0100 From: =?iso-8859-2?q?S=B3awek_=AFak?= <szak@era.pl> To: "Kevin Oberman" <oberman@es.net> Cc: freebsd-current@freebsd.org Subject: Re: 5.2-BETA: giving up on 4 buffers (ata) Message-ID: <86he0rymtd.fsf@thirst.unx.era.pl> In-Reply-To: <20031126185136.562385D08@ptavv.es.net> (Kevin Oberman's message of "Wed, 26 Nov 2003 10:51:36 -0800") References: <20031126185136.562385D08@ptavv.es.net>
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"Kevin Oberman" <oberman@es.net> 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.
>
> I have observed the following:
> System dies leaving the file systems dirty. (File systems have
> soft-updates enabled.)
> I reboot to single user and fsck all partitions including the root.
> I halt or reboot.
> I get a number of dirty buffers and the syncer eventually gives up.
>
> If I issue a "mount -u /" before shutting down, the problem does not
> occur. Why I should be able to get dirty buffers on a file system that
> has never been mounted as RW, I don't understand, but I see it every
> time I reboot after a crash.
It happened to me many times on various machines. Some running 4.x, so no
GEOM. I wonder why all the file systems are marked dirty. The buffers are
associated with specific device anyway.
/S
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