Excerpts from netbsd: 1-Dec-95 nfs client hangs 1.1_ALPHA .. Jan-Hinrich
Fessel@zappa (1175*)

>if I interrupt the hangin process, all is fine.
>All other nfs activities seem to hang utlil that is done.

I see a similar behaviour with a NetBSD-1.0 i386 client and a
DEC OSF/1 Alpha server. Only the NFS activity on the
NetBSD box hangs, other clients continue working.
(I can't try to restart the server.)

This happens perhaps 2 times for a full kernel build.

The stacktrace looks like:
Debugger
sgetc
pcmmap
softclock
hardclock
clockintr
Xintr0
---interrupt---
idle
bpendtsleep
sys_sigsuspend or sys_select
syscall

regards
Matthias