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    SubjectRe: [PATCH 0/16] DMA-API debugging facility v2

    On Thu, Feb 05, 2009 at 10:52:32PM +0000, David Woodhouse wrote:
    > This adds a function to dump the DMA mappings that the debugging code is
    > aware of -- either for a single device, or for _all_ devices.
    > This can be useful for debugging -- sticking a call to it in the DMA
    > page fault handler, for example, to see if the faulting address _should_
    > be mapped or not, and hence work out whether it's IOMMU bugs we're
    > seeing, or driver bugs.
    > I'd also like to make it answer the question 'should address X be mapped
    > for device Y', but I'll get to that next.
    > Do we have a %pX format for printing dma_addr_t yet?
    > Signed-off-by: David Woodhouse <>

    Great. Thanks. Applied to my dma-api/debug branch.


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