Hi, friends:

I'm studying the affect of NFSv4 on Linux.  As far as I know, NFS
implemented in Linux kernel supports read delegation but not write
delegation.  I wonder if Ganesha implements write delegation?  If yes,
can it take effect if accessed by Linux NFS client?

I use the following config file to observe delegation in Ganesha:

EXPORT {
        Export_Id = 77;
        Path = /e;
        Pseudo = /e;
        Access_Type = RW;
        FSAL {
                Name = XFS;
        }

        Delegations = readwrite;
}

NFSV4 {
        Delegations = true;
}

However, I did not see any trace of delegation under various workloads
(example: repeated read [1], repeated write [2]) using tools like
nfstrace or tcpdump.  When running in debug mode, I always got the
following in the log file:

ganesha.nfsd-8999[main] display_fsinfo :FSAL :DEBUG :  delegations = 0

indicating that delegation was not on.
Is there something wrong with my config file?  Or any other clue
regarding NFS delegation?  Thanks ( ;

Ganesha V2.5-rc6 running on Fedora 25, accessed by CentOS 7 client.

[1] repeated read: http://codepad.org/6KUat5AI
[2] repeated write: http://codepad.org/cuBZ3XuT

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