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Date: Sat, 19 Jan 2008 00:12:18 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: Jakub Siroky <jakob@dev.citybikes.cz>
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Cc: freebsd-stable@freebsd.org
Subject: Re: panic when copying to ext2fs
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Jakub Siroky wrote:
> I have two large ext2fs partitions (368 and 313GB) to hold data shared between several OSes.  While there were no problems on 6-STABLE branch I was quite 
disappointed after upgrade to 7-STABLE. Whenever I copy/write to ext2fs 
partition the system freezes totally without crashdump. So I set 
debugging settings to kernel config (DEBUG,WITNESS,..) and in console I 
reproduced error situation ending with full screen of unstoppable 
running text with lot of memory addresses and a few recognisable words: 
'new block bit set for ext already' - again with no crashdump. Then I 
have formatted 1GB partition with ext2fs and the problem on this small 
partition appears only sometimes.

1) Please wrap your lines so your emails can be easily read.

2) Check the developer's handbook, it explains how to configure the 
debugger so you can investigate this further.

Kris