Re: NFS lock and timeout problems

[Chip Salzenberg <chip@pobox.com>]

According to Christoph Simon:
> The server is a debian sid machine with an unpatched 2.4.19 kernel und
> the official debian packages for the kernel server. The client is a
> debian 3.0 (stable) machine with the same kernel, but having only NFS
> client compiled into it, not the kernel nfs server.

Caveat: I don't really know what's going wrong.

However, I think this may be part of the problem:

> /etc/hosts.allow on the client has:
> 	portmap: 192.168.254.15
> 	lockd:   192.168.254.15
> 	rquotad: 192.168.254.15
> 	mountd:  192.168.254.15
> 	statd:   192.168.254.15

The client needs to be able to communicate with itself.  You should
probably have "ALL: 127.0.0.1" in there as well.

Also, in a possibly unrelated matter, I suggest that the client mount
a ramdisk on /var before statd runs from /etc/init.d/nfs-common starts
statd.  Make sure that /var/lib/nfs exists before you start.  This is
probably a good idea anyway given that you surely don't want lots of
clients sharing /var.

> 	nsm_mon_unmon: rpc failed, status=-13
> 	lockd: cannot monitor 192.168.254.15
> 	lockd: failed to monitor 192.168.254.15
> 
> I tried to trace the command from the rcS.d scripts which would cause
> them, and, if there is no delay, the first comes in checkroot.sh, when
> "mount -f -o remount /" is given. I've read that status=-13 tells that
> statd is missing, but at this time it's running on the server and on
> the client [...]

How is it running on the client?  IIRC, checkroot.sh runs long before
'/etc/init.d/nfs-common start'.

> I also found it strange, that "cat /proc/mount" on the client will
> always give:
> 
> 	192.168.254.15:/nfsvol / \
> 	  nfs rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.254.15
> 
> where v3, rsize, wsize, udp and lock are options I never gave.

Those are the defaults for the given options.

> read that the defaults for rsize,wsize is 1024,

That was long ago.  Nowadays, 8K is the default.
-- 
Chip Salzenberg         - a.k.a.  -        <chip@pobox.com>
         "It furthers one to have somewhere to go."


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