On Thu, 15 May 2008 11:01:09 +0200
Andi Kleen <andi@firstfloor.org> wrote:

quoted text
> 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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