In some email I received from David Gilbert, sie wrote:
> 
> 	A number of people have reported unkillable processes stuck in
> the 'D' (Uninteruptable Disk Wait) state.  I have a bit more evidence
> for the fire.
> 
> 	I have found that if I get a process stuck in 'D', then I can
> produce more such processes by attempting to read the directory in
> which that process is attempting to read files.  I have been able to
> duplicate this where I had compiles running which I could definately
> track down.
> 
> 	Interestingly, nfsd processes will also get stuck in this
> manner.  I don't know if this is interesting, or not.

This is just NFS losing.  Probably means your network has fallen over (or
the NFS server) and you don't have the partition mounted with "intr" or
"soft" options.

darren