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    SubjectRe: [NFS] Re: problems with reiserfs + nfs using 2.4.2-pre4
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    >>>>> " " == Roman Zippel <zippel@fh-brandenburg.de> writes:

    > Hi, On Tue, 20 Feb 2001, Neil Brown wrote:

    >> 2/ lookup("..").

    > A small question: Why exactly is this needed?

    Short answer: the existence of 'rename' makes it necessary, since it
    means that the directory path is volatile as far as the client is
    concerned.

    IIRC several NFS implementations (not Linux though) rely on being able
    to walk back up the directory tree in order to discover the path at
    any given moment.

    Under Linux, our reliance on dentries doesn't allow for directory
    paths to be volatile, so we don't support it. Instead we end up having
    to support aliased directories.

    Cheers,
    Trond
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