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Date: Fri, 23 Jan 2004 09:18:28 -0800 (PST)
From: Doug White <dwhite@gumbysoft.com>
To: Martin Matuska <martin@tradex.sk>
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cc: freebsd-current@FreeBSD.org
Subject: Re: vnode-backed md stops responding on copying files
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On Mon, 19 Jan 2004, Martin Matuska wrote:

> I am using FreeBSD-Current (post 5.2-RELEASE) and have created a vnode
> backed vn using these commands:
>
> mdconfig -a -t vnode -s 8G -f somebackingfile -u 0 (I tried 4G and 2G, too)
> bsdlabel -w md0 auto
> newfs md0c
> mount /dev/md0c /mnt
>
> Then I started copying files or doing a make installworld DESTDIR=/mnt from
> /usr/src and md hangs after some time copying. The md device and all processes
> accessing it cannot be accessed, only a hardware reset is possible to survive,
> reboot command doesn't work, too.

Can you use ps and get the WCHANs for the offending proceses?  I'm curious
if it stuck in a lock or blocking on something else.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org