On Tue, 10 Nov 2020 21:42:33 +0800 "xuxiaoyang (C)" <xuxiaoyang2@xxxxxxxxxx> wrote: > vfio_iommu_type1_pin_pages is very inefficient because > it is processed page by page when calling vfio_pin_page_external. > Added contiguous_vaddr_get_pfn to process continuous pages > to reduce the number of loops, thereby improving performance. vfio_pin_pages() accepts an array of unrelated iova pfns and processes each to return the physical pfn. AFAICT this proposal makes an unfounded and unverified assumption that the caller is asking for a range of contiguous iova pfns. That's not the semantics of the call. This is wrong. Thanks, Alex
