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    SubjectRe: [PATCH RFC v3] vfs: make fstatat retry once on ESTALE errors from getattr call
    On 04/20/2012 10:40 AM, Jeff Layton wrote:
    > I guess the questions at this point is:
    > 1) How representative is Peter's mkdir_test() of a real-world workload?
    Reading your email I had to wonder the same thing... What application
    removes hierarchy of directories in a loop from two different clients?
    I would suspect not many, if any... esp over NFS...

    > 2) if we assume that it is fairly representative of one, how can we
    > achieve retrying indefinitely with NFS, or at least some large finite
    > amount?
    The amount of looping would be peer speculation. If the problem can
    not be handled by one simple retry I would say we simply pass the
    error up to the app... Its an application issue...

    > I have my doubts as to whether it would really be as big a problem for
    > other filesystems as Miklos and others have asserted, but I'll take
    > their word for it at the moment. What's the best way to contain this
    > behavior to just those filesystems that want to retry indefinitely when
    > they get an ESTALE? Would we need to go with an entirely new
    > ESTALERETRY after all?
    Introducing a new errno to handle this problem would be overkill IMHO...

    If we have to go to the looping approach, I would strong suggest we
    make the file systems register for this type of behavior...


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