This series deletes the for loop in dma_map/unmap for hugetlb pages. In the original process, the for loop could spend much time to check all normal pages.If we use hugetlb pages, it is not necessary to do this. Changes from v3 - add a new API unpin_user_hugetlb_pages_dirty_lock() - use the new API to unpin hugetlb pages Ming Mao (2): vfio dma_map/unmap: optimized for hugetlbfs pages vfio: optimized for unpinning pages drivers/vfio/vfio_iommu_type1.c | 373 ++++++++++++++++++++++++++++++-- include/linux/mm.h | 3 + mm/gup.c | 91 ++++++++ 3 files changed, 450 insertions(+), 17 deletions(-) -- 2.23.0
