[PATCH v1 0/3] udmabuf: Add support for page migration out of movable zone or CMA

[Vivek Kasireddy]

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 at redhat.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Mike Kravetz <mike.kravetz at oracle.com>
Cc: Hugh Dickins <hughd at google.com>
Cc: Peter Xu <peterx at redhat.com>
Cc: Jason Gunthorpe <jgg at nvidia.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: Dongwon Kim <dongwon.kim at intel.com>
Cc: Junxiao Chang <junxiao.chang at 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