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 <david@xxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Dongwon Kim <dongwon.kim@xxxxxxxxx>
Cc: Junxiao Chang <junxiao.chang@xxxxxxxxx>
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
