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    SubjectRe: RDMA memory registration
        Bill> Are you suggesting making the partial pages their own VMA,
    Bill> or marking the entire buffer with this flag? I originally
    Bill> thought the entire buffer should be copy on fork (instead of
    Bill> copy on write), and I believe this is the path Mellanox was
    Bill> pursing with the VM_NO_COW flag. However, if applications
    Bill> are registering gigs of ram, it would be very bad to have
    Bill> the entire area copied on fork.

    It's up to userspace really but I would expect that the partial pages
    would be in a vma by themselves.

    - R.

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