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    SubjectRe: [PATCH 0/2] x86: per-device dma_mapping_ops
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    On Thu, 15 May 2008 11:01:09 +0200
    Andi Kleen <andi@firstfloor.org> wrote:

    > FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> writes:
    >
    > > This patchset adds per-device dma_mapping_ops support for
    > > CONFIG_X86_64 like POWER architecture does. This change enables us to
    > > cleanly fix the Calgary IOMMU issue that some devices are not behind
    > > the IOMMU [1]. It also would be helpful to handle KVM PCI passthrough.
    >
    > This makes it basically impossible to do stack ops, which some
    > people have been doing.

    Seems that I misunderstand what those people want.

    What those people want to do and how the stack ops achieve it? Or can
    you tell me where their patches are?


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