NFS client renders system unusable

[Sarton O'Brien <bsd-xen%roguewrt.org@localhost>]

I have an NFS server running with samba on lfs which occaisionally 
panics for reasons I haven't bothered to delve into yet, I'm almost 
positive it is either samba or lfs related ... but most likely the 
combination.

When the NFS server dies, the client console fills up with:

yp_order: clnt_call: RPC: Unable to send; errno = No buffer space available
yp_order: clnt_call: RPC: Unable to send; errno = No buffer space available
yp_order: clnt_call: RPC: Unable to send; errno = No buffer space available
yp_order: clnt_call: RPC: Unable to send; errno = No buffer space available
yp_order: clnt_call: RPC: Unable to send; errno = No buffer space available
yp_order: clnt_call: RPC: Unable to send; errno = No buffer space available

And the client system becomes completely unusable.

In this instance it occurred within minutes of the server dying.

Googling the error doesn't reveal much so I'm not sure if there is 
something I can do to mitigate the effects, if it's a known issue or if 
it's a bug. As the NFS server used to be almost completely stable, this 
is a problem I've never really encountered.

Any help appreciated.

Sarton