On 09/30/2014 07:45 PM, Thomas Gleixner wrote: > Whether the proposed patchset is the correct solution to support it is > a completely different question.
This patchset has been in mainline since 3.16 and has already caused regressions, so the question of whether this is the correct solution has already been answered. > So either you stop this right now and help Akinobu to find the proper > solution If this is only a test platform for ARM parts then I don't think it unreasonable to suggest forking x86 swiotlb support into a iommu=cma selector that gets DMA mapping working for this test platform and doesn't cause a bunch of breakage. Which is different than if the plan is to ship production units for x86; then a general purpose solution will be required. As to the good design of a general purpose solution for allocating and mapping huge order pages, you are certainly more qualified to help Akinobu than I am. Regards, Peter Hurley -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
