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    SubjectRe: [PATCH] O_STREAMING - flag for optimal streaming I/O
    Giuliano Pochini wrote:
    >
    > > The point of O_STREAMING is one change: drop pages in the pagecache
    > > behind our current position, that are free-able, because we know we will
    > > never want them.
    >
    > Does it drop pages unconditionally ?

    Yup.

    > What happens if I do a
    > streaming_cat largedatabase > /dev/null while other processes
    > are working on it ?

    You'll make your database run really slowly.

    > It's not a good thing to remove the whole
    > cached data other apps are working on.
    >

    Don't do that then ;)

    Seriously, there are tons of ways of creating local performance
    DoS'es of this form. fsync is an excellent tool for that.
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