NFS server delays on NSLU2

[Marcus Better <marcus@better.se>]

Hi,

I'm running an NFSv4 server on my slug with kernel 2.6.18-4-ixp4xx, using
GSSAPI authentication and with autofs on the client. In general it works,
but I often experience delays when (auto)mounting partitions. For example,
doing
  ls /mnt/nfs/slug/files
on the client when the share is not yet mounted results in a long delay
(perhaps minutes). If I interrupt the command and do 
  ls /mnt/nfs/slug
to list all the shares on the server, it often only shows one share, the one
that I tried to access. The remaining ones show up only after a few
minutes.

After that it usually works well without noticeable delays for the rest of
the session.

Since it's a somewhat complex setup I'm not sure how to debug it. The only
thing I know is that I have another NFSv4 server on a larger i386 system
with an identical setup, and it works without delays, with exactly the same
client. So I'm half-suspecting that it may have something to do with the
new IXP network driver.

Marcus