Subject: kern/17145: NFS client freezes
To: None <firstname.lastname@example.org>
From: Michael van Elst <email@example.com>
Date: 06/02/2002 23:02:30
>Synopsis: NFS client freezes
>Arrival-Date: Sun Jun 02 14:03:01 PDT 2002
>Originator: Michael van Elst
>Release: NetBSD 1.6_BETA1
System: NetBSD pepew 1.6_BETA1 NetBSD 1.6_BETA1 (PEPEW) #0: Sun Jun 2 00:14:31 MEST 2002 src@pepew:/amd/fud/d/0/src/sys/arch/i386/compile/PEPEW i386
NFS-mounting the src filesystem with default mount parameters from
a NetBSD 1.5.3_RC2 server and doing a simple find /usr/src stops
after a few dozen files are listed.
The same worked fine when the NFS-client (pepew) was still running
Sniffing the net shows that the client sends a readdir() request that
is answered by the server followed by a long delay. It is possible
that subsequent readdir() requests are just retries of the first.
If you do hard, non-intr mount and cause the freeze it is impossible
to break out and the system won't shut down properly.