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    SubjectRe: [openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation
    On Mon, Apr 18, 2005 at 09:40:40PM +0200, Arjan van de Ven wrote:
    >On Mon, 2005-04-18 at 11:25 -0500, Timur Tabi wrote:
    >> 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!!
    darn, yes, this is true.
    I know people who introduced
    #define VM_RESERVED 0x00080000 /* Don't unmap it from swap_out
    to vm_flags just because of this. I'll just hold my breath and won't
    delve further.
    >> 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.
    >you should since that physical page can be reused, say by a root
    >process, and you'd be majorly screwed
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      Last update: 2005-04-18 22:13    [W:0.021 / U:2.588 seconds]
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