This patch series adds support for migrating pages associated with a udmabuf out of the movable zone or CMA to avoid breaking features such as memory hotunplug.
The first patch exports check_and_migrate_movable_pages() function out of GUP so that the udmabuf driver can leverage it for page migration that is done as part of the second patch. The last patch adds two new udmabuf selftests to verify data coherency after page migration. Cc: David Hildenbrand <da...@redhat.com> Cc: Daniel Vetter <daniel.vet...@ffwll.ch> Cc: Mike Kravetz <mike.krav...@oracle.com> Cc: Hugh Dickins <hu...@google.com> Cc: Peter Xu <pet...@redhat.com> Cc: Jason Gunthorpe <j...@nvidia.com> Cc: Gerd Hoffmann <kra...@redhat.com> Cc: Dongwon Kim <dongwon....@intel.com> Cc: Junxiao Chang <junxiao.ch...@intel.com> Vivek Kasireddy (3): mm/gup: Export check_and_migrate_movable_pages() udmabuf: Add support for page migration out of movable zone or CMA selftests/dma-buf/udmabuf: Add tests to verify data after page migration drivers/dma-buf/udmabuf.c | 106 +++++++++++- include/linux/mm.h | 2 + mm/gup.c | 9 +- .../selftests/drivers/dma-buf/udmabuf.c | 151 +++++++++++++++++- 4 files changed, 254 insertions(+), 14 deletions(-) -- 2.39.2