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    SubjectRe: Linux 2.6.39-rc3
    On Fri, Apr 15, 2011 at 10:33 AM, Joerg Roedel <> wrote:
    > On Fri, Apr 15, 2011 at 03:16:50PM +0200, Ingo Molnar wrote:
    >> Ok, but how did the allocation changes start triggering this error in
    >> v2.6.39-rc1? There must still be some layout specific thing here, right?
    >> Do we understand the details of that as well?
    > No, I must admit that I lack enough knowledge about the GPU hardware to
    > make an guess how this tanslation-request happened. All I can tell is
    > the address that was reported in the MCE, it is 0xa0001000 (==the second
    > page of the GART aperture).
    > Maybe Alex can help here. Alex, may it be possible that the GPU
    > generates DMA requests in the GTT area before the GTT is activated (or
    > the activation is completed)? Or can you imagine any other reason?

    It shouldn't. The driver binds a dummy page to all entries in the
    table at init time and whenever the actual pages are unbound.


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