vnode-backed md stops responding on copying files

[Doug White]

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 at gumbysoft.com          |  www.FreeBSD.org