[OpenAFS] *Really* slow "vos listvol"

[Garrett Wollman]

I have one server where "vos listvol -format" sometimes
(unpredictably) takes an inordinate amount of time.  I measured 18
minutes yesterday; today it's been anywhere from 15 seconds to 5
minutes.  Looking at a network trace for one that took about five
minutes, I see the list-volumes RPC, then keepalive ACKs every 30
seconds, and then finally the first packet of the reply four minutes
and change later.  The server has a reasonable load on it, and the
partition in question hasn't been touched today.  We're running the
Debian "lenny" packaged OpenAFS 1.4.7 server, and "rxdebug -port 7005"
shows that I'm the only client talking to the volserver.

-GAWollman