> I have had a problem for some time that processes get stuck in
     > D state and I now have a way to get this to happen at will.
     > One way to do this is to copy a file from one nfs mounted
     > directory to another. It dose not happen on the same mount and
     > not when copying from nfs to a local disk. To make this even
     > more complex it works with cp and mv but not in mc(midnight
     > commander F6 ).
Sounds like a network driver problem or something like that. UDP
appears to trigger these lockups a lot more easily than does TCP.
Try testing with a different brand of networking card...
Cheers,
   Trond
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