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    SubjectRe: [LSF/MM TOPIC] Discuss least bad options for resolving longterm-GUP usage by RDMA
    On Mon, 11 Feb 2019, John Hubbard wrote:

    > But anyway, Jan's proposal a bit earlier today [1] is finally sinking into
    > my head--if we actually go that way, and prevent the caller from setting up
    > a problematic gup pin in the first place, then that may make this point sort
    > of moot.

    Ok well can be document how we think it would work somewhere? Long term
    mapping a page cache page could a problem and we need to explain that
    somewhere.

    > > ie indicate to the FS that is should not attempt to remap physical
    > > memory addresses backing this VMA. If the FS can't do that it must
    > > fail.
    > >
    >
    > Yes. Duration is probably less important than the fact that the page
    > is specially treated.

    Yup.

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