From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: 32k NFS blocksize not working
Date: 12 Mar 2003 23:41:59 +0100
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To: Brent Clements <bclem@rice.edu>
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>>>>> " " == Brent Clements <bclem@rice.edu> writes:

     > We have a linux server running 2.4.20 plus it has nfsv3 udp/tcp
     > server support compiled in.

     > We have a linux client running 2.4.20 plus it has nfsv3 udp/tcp
     > client support compiled.


     > If we specify a read/write size above 8192 on the client, and
     > then mount the nfs directory. It gives us the following on
     > /proc/mounts


     > cluster:/usr/local/ /tmp/d nfs
     > rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=cluster 0 0

     > Do we have to edit something in a kernel include file to allow
     > NFSV3 to mount above 8k?

You'll have to find a server which supports it. Linux 2.4.x knfsd as
it stands, supports only 8k, and so the client will override any
attempt that you make to set either rsize or wsize > 8k.

If you are feeling brave, you might try to change the value of
NFSSVC_MAXBLKSIZE in include/linux/nfsd/const.h and recompiling the
server.

Cheers,
  Trond


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