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Date:      Mon, 07 Feb 2011 11:15:38 -0800
From:      Doug Barton <dougb@FreeBSD.org>
To:        Bruce Cran <bruce@cran.org.uk>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: ext2fs crash in -current (r218056)
Message-ID:  <4D5044DA.7000406@FreeBSD.org>
In-Reply-To: <20110207153419.00003583@unknown>
References:  <4D47B954.3010600@FreeBSD.org>	<201102040759.51736.jhb@freebsd.org>	<4D4C6DF4.2060004@FreeBSD.org>	<201102071017.42616.jhb@freebsd.org> <20110207153419.00003583@unknown>

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On 02/07/2011 07:34, Bruce Cran wrote:
> On Mon, 7 Feb 2011 10:17:42 -0500
> John Baldwin<jhb@freebsd.org>  wrote:
>
>> No other messages at all before the 'da0: autosense failed' line?

Right.

> I've seen this with msdosfs: a memory stick I'm using just stops
> working after a while with the "autosense failed" error - and nothing
> before it. I'm wondering what debug sysctls to use to see what's going
> wrong.

I was copying from a fat32 partition to an ext2fs partition on the same 
USB drive, so this fits.

Meanwhile, I finally had a chance to stress test John's locking patch. 
It successfully passed a make -j2 buildworld/buildkernel with src and 
obj on the same partition, and a ports build of libreoffice (and its 
several dozen deps) with ports and WRKDIRPREFIX on the same partition, 
part of which overlapped with the world build.


Doug

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