5.2-BETA: giving up on 4 buffers (ata)

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Nov 26 10:57:23 PST 2003

In message <20031126185136.562385D08 at ptavv.es.net>, "Kevin Oberman" writes:
>> Date: Wed, 26 Nov 2003 19:37:45 +0100
>> From: Matthias Andree <matthias.andree at gmx.de>
>> Sender: owner-freebsd-current at 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 at 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.

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