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    SubjectRe: [RFC] Initial alpha-0 for new page allocator API
    On Friday 22 September 2006 06:02, Christoph Lameter wrote:
    > We have repeatedly discussed the problems of devices having varying
    > address range requirements for doing DMA.

    We already have such an API. dma_alloc_coherent(). Device drivers
    are not supposed to mess with GFP_DMA* directly anymore for quite
    some time.

    > We would like for the device
    > drivers to have the ability to specify exactly which address range is
    > allowed.

    I actually have my doubts it is a good idea to add that now. The devices
    with weird requirements are steadily going away.


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