NFS stops responding

[Michael ODonnell]

An update, FWIW: I created an entry (4265) in the CentOS bug database for
that NFS problem and they pushed back saying I needed to reproduce it with
the latest bits instead of the slightly (6 mo) stale stuff we're using.
Fair enough; unfortunately, I was able to do so and need to update them
with latest traces, etc.  I also reported it on the linux-nfs mailing
list and except for one "Hey, ya know, I maybe have seen that once or
twice, myself..."  there's not been much said in response.  In my Copious
Spare Time(tm) I intend to try to reproduce it with a recent kernel.org
kernel and recent versions of all relevant userland bits in hopes that
somebody may accidentally have fixed this in the meantime.