I've just been reading about the successes of some folks in the FreeBSD 
project finding and fixing bugs in their NFS and softupdates code using 
a stress tester called fsx. Has anyone tried this tool or something like 
it against NetBSD?

I'm a little scared, since I figure I'll end up crashing my machines, 
but I figure I'm going to have to do it. :)

For all the details, take a look at this thread:

    <http://kerneltrap.org/article.php?sid=415>

The fsx source can be had at <http://kerneltrap.org/sup/415/fsx.txt>.  
It does compile without modification on NetBSD.

(OK. I just compiled it and ran it. On several different kinds of file 
systems -- ffs, mfs, and nfs -- on both 1.5X and 1.5Y, I get the same 
exact error on the second operation. I don't know if this is a bug in 
fsx or NetBSD. I'll have to look into this.)

- Geoff