On 11/15/2013 10:30 AM, Vivek Goyal wrote: > > And IOMMU support is very flaky with kdump. And IOMMU's can be turned > off at command line. And that would force one to remove crahkernel_low=0. > So change of one command line option forces change of another. It is > complicated. > > Also there are very few systems which work with IOMMU on. A lot more > which work without IOMMU. We have all these DMAR issues and still nobody > has been able to address IOMMU issues properly. > Why do we need such a big bounce buffer for kdump swiotlb anyway? Surely the vast majority of all dump devices don't need it, so it is there for completeness, no? -hpa -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>