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    SubjectRe: [rfc] Ignore Fsync Calls in Laptop_Mode
    On Mon, 30 May 2011, Valdis.Kletnieks@vt.edu wrote:

    > On Mon, 30 May 2011 09:13:27 +0200, Oliver Neukum said:
    >> Am Montag, 30. Mai 2011, 03:53:18 schrieb david@lang.hm:
    >
    >>> if what you are wanting is the ability to say 'these things must be
    >>> written before these other things to keep them from being corrupted, but I
    >>> don't care when they get written (or if they get lost in a crash)' then
    >>> what you want isn't fsync, it's a barrier.
    >>
    >> Yes, but where is the problem?
    >
    > The problem is that *from userspace*, the closest approximation to a barrier
    > is fsync().

    good point, there really should be some way of doing a barrier from
    userspace.

    David Lang


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