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make-automaps: add -vers=4.0 to all nfs mounts #69

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Jan 23, 2019
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  1. make-automaps: add -vers=4.0 to all nfs mounts

    Since a few days we have some severe nfs problems with the
    server continuously logging "RPC request reserved 84 but used 276"
    and the affected client blocking.
    
    This may be related to the fact, that after the last update of nfs-utils
    the mount.nfs command now supports nfs4.1 so that new mounts are done
    with nfs4.1 (or nfs4.2 if the server kernel supports it) and not
    with nfs4.0 as before.
    
    Some bug reports on the internet suggest, that the problem does not
    exist with nfs4.0 [1].
    
    Change make-automaps to add -vers=4.0 to all location entries of all
    maps. Experiments confirmed, that this (nfs-specific) option doesn not
    interfere with bind mounts, when the location is on the local host.
    
    [1]: https://bugzilla.redhat.com/show_bug.cgi?id=1552037
    donald committed Jan 23, 2019
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