network constipation?

[Danny Braniss]

hi,
	i have 2 amd64s (one dual opteron, one athlon64), which behave 
identicaly. Im trying to compile /usr/ports/x11-fonts, ports & obj are
nfs mounted (on the the same server). 
	so things go nicely, but after a while gzip hangs, and later
i get 'nfs server dev:/r+d: not responding', this happens on both
hosts, (i just tried it on both to see if the error was in the driver,
since they have different cards).
	it's almost obvious that i've hit on a deadlock, where can i look
for some hint?

thanks,
	danny