linux-kernel - Monthly md check == hung machine; how do I debug?

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Date:	Sun, 3 Feb 2008 13:21:55 -0800
From:	Robin Lee Powell <rlpowell@...italkingdom.org>
To:	linux-kernel@...r.kernel.org
Subject: Monthly md check == hung machine; how do I debug?

I've got a machine with a 4 disk SATA raid10 configuration using md.
The entire disk is loop-AES encrypted, but that shouldn't matter
here.

Once a month, Debian runs:

    /usr/share/mdadm/checkarray --cron --all --quiet

and the machine hangs within 30 minutes of that starting.

It seems that I can avoid the hang by not having "mdadm --monitor"
running, but I'm not certain if that's the case or if I've just been
lucky this go-round.

I'm on kernel 2.6.23.1, my own compile thereof, x86_64, AMD
Athlon(tm) 64 Processor 3700+.

I've looked through all the 2.6.23 and 2.6.24 Changelogs, and I
can't find anything that looks relevant.

So, how can I (help you all) debug this?

-Robin

-- 
Lojban Reason #17: http://en.wikipedia.org/wiki/Buffalo_buffalo
Proud Supporter of the Singularity Institute - http://singinst.org/
http://www.digitalkingdom.org/~rlpowell/ *** http://www.lojban.org/
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