vnlur_proc lockups under high disk I/O

[Gary Allan <dragonfly@xxxxxxxxxxxxxxx>]

Hello,

I've been encountering total lockups under high disk I/O, this first 
happened when I extracted a pkgsrc tarball but is also happening when 
using cvsup to update ports and sources.

I've wiped /usr/src and /usr/obj and done a full buildworld today but it 
has had no effect. The machine only works in 'bursts', ~5 seconds of 
nothing followed by a few seconds of working normally. Sometimes the 
system completely locks up and displays the following diagnostics.

vnlru_proc: vnode recycler stopped working!
vnlru_proc: vnode recycler stopped working!
vnlru_proc: vnode recycler stopped working!
. ..

The file system is left in dire need of fsck on a reboot.

It's entirely likely that I'm responsible as I use the machine as a 
testing platform for just about everything.

Has anyone else had this problem? It's fairly reproducible so I can 
provide more information to anyone who wants it. Otherwise it's a fresh 
install of stable :)

Regards

Gary