linux-ext4 - Re: ext3 data=journal hangs

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Date:	Wed, 10 Jan 2007 16:03:51 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	linux-ext4@...r.kernel.org
Subject: Re: ext3 data=journal hangs

On Tue, 9 Jan 2007 15:11:23 -0800 Randy Dunlap wrote:

> Hi,
> 
> (2.6.20-rc4, x86_64 1-proc on SMP kernel, 1 GB RAM)
> 
> I'm running fsx-linux (akpm ext3-tools version) on an ext3 fs
> with data=journal and fs blocksize=2048.  I've been trying to
> get some kind of kernel messages from it but I can't get any
> debug IO done successfully.
> 
> It has hung on me 3 times in a row today.  I'm using this command:
> fsx-linux -l 100M -N 50000 -S 0 fsxtestfile
> 
> This is run in a new partition on a IDE drive (/dev/hda7,
> using legacy IDE drivers).
> 
> Any suggestions for debug output?  I can see SysRq output on-screen
> (sometimes) but it doesn't make it to my serial console.
> 
> Any patches to test?  :)

More notes:
Fails (hangs) with fs blocksize of 1024, 2048, or 4096.
On data=journal mode hangs.  writeback and ordered run fine.

After several runs (hangs), I was able to get some sysrq output
to the serial console.

kernel config:  http://oss.oracle.com/~rdunlap/configs/config-2620-rc4-hangs
message log:    http://oss.oracle.com/~rdunlap/logs/fsx-capture.txt

Can anyone see what fsx-linux is waiting on there?

Thanks,
---
~Randy
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