This was originally an email support ticket. We recommended that he upgrade to the knfsd 1.4.7 rather than using 1.2.2-4. Final email from customer states: As of now, I can run my nfs server correctly under 2.2.5-22 if, and only if, I install the knfsd 1.2.2-4 rpm's after installing the kernel rpm. (I'm guessing that I couldn't get this to work earlier because the sequence of rpm's may be critical.) However, if I install the knfsd 1.4.7-2 rpm's in that same sequence instead of 1.2.2-4, I get the error mount: RPC: Program not registered It looks like NFS support should be expected to be pretty tenuous for now. But at least I can finally get something.
There are knfsd version specific patches in the kernel, so you need to upgrade both the kernel and knfsd simultaneously. AFAIK, the latest kernel in Raw Hide has the patches for the latest knfsd in Raw Hide.