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    SubjectRe: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation
    Arjan van de Ven wrote:

    > this is a myth; linux is free to move the page about in physical memory
    > even if it's mlock()ed!!

    Then Linux has a very odd definition of the word "locked".

    > And even then, the user can munlock the memory from another thread etc
    > etc. Not a good idea.

    Well, that's okay, because then the app is doing something stupid, so we don't worry about
    that.

    > get_user_pages() is used from AIO and other parts of the kernel for
    > similar purposes and in fact is designed for it, so it better work. If
    > it has bugs those should be fixed, not worked around!

    I've been complaining about get_user_pages() not working for a long time now, but I can
    only demonstrate the problem with our hardware. See my other post in this thread for details.

    --
    Timur Tabi
    Staff Software Engineer
    timur.tabi@ammasso.com
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