Bug#898060: Stall NFS clients: RPC request reserved 84 but used 272

[Christof Koehler <christof.koehler@bccms.uni-bremen.de>]

Hello everybody,

in the thread on the ubuntu tracker someone else pointed out that this
was also observed on fedora 26, see comment 14 in
https://bugzilla.redhat.com/show_bug.cgi?id=1552037

Apparently it was suggested there (comment 14) that forcing NFS vers=4.0
for the mount appears to fix this as far as it can be reliably
reproduced. Note that debian 9 and ubuntu 18.04 apparently default to
vers=4.2.

I will try that next.

Best Regards

Christof