The first patch introduces pin_user_pages_fd() API and the second patch shows how the udmabuf driver can use it to longterm-pin the the pages. The last patch adds two new udmabuf selftests to verify data coherency after page migration.
Cc: David Hildenbrand <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: Mike Kravetz <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Peter Xu <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Gerd Hoffmann <[email protected]> Cc: Dongwon Kim <[email protected]> Cc: Junxiao Chang <[email protected]> Vivek Kasireddy (3): mm/gup: Introduce pin_user_pages_fd() for pinning shmem/hugetlbfs file pages udmabuf: Pin the pages using pin_user_pages_fd() API selftests/dma-buf/udmabuf: Add tests to verify data after page migration drivers/dma-buf/udmabuf.c | 82 +++++++--- include/linux/mm.h | 2 + mm/gup.c | 87 ++++++++++ .../selftests/drivers/dma-buf/udmabuf.c | 151 +++++++++++++++++- 4 files changed, 297 insertions(+), 25 deletions(-) -- 2.39.2
