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    SubjectRe: [PATCH] O_STREAMING - flag for optimal streaming I/O
    Matthias Schniedermeyer wrote:
    >
    > ...
    > I only have 3 GB of RAM, and creating and writing trashes the whole
    > cache twice.

    That's actually something completely dumb and irritating which
    Linux has done for ever ;)

    What we need is to detect the situation where someone is linearly
    walking through a file which is preposterously too large to cache,
    and just start dropping it.

    It's not hard to implement the lower machinery to do that - it would
    basically be an internal call to posix_fadvise(), which we don't
    have but could and perhaps should...

    The tricky part is designing the algorithm which decides when to
    pull the trigger.
    -
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