[PATCH v2 0/7] mm/hmm/nouveau: add THP migration to migrate_vma_*

Ralph Campbell
2020-09-02T17:01:08Z

This series adds support for transparent huge page migration to
migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers.
An earlier version was posted previously [1]. This version now
supports splitting a THP midway in the migration process which
led to a number of changes.

The patches apply cleanly to the current linux-mm tree. Since there
are a couple of patches in linux-mm from Dan Williams that modify
lib/test_hmm.c and drivers/gpu/drm/nouveau/nouveau_dmem.c, it might
be easiest if Andrew could take these through the linux-mm tree
assuming that's OK with other maintainers like Ben Skeggs.

[1] https://lore.kernel.org/linux-mm/20200619215649.32297-1-rcampbell@nvidia.com

Ralph Campbell (7):
mm/thp: fix __split_huge_pmd_locked() for migration PMD
mm/migrate: move migrate_vma_collect_skip()
mm: support THP migration to device private memory
mm/thp: add prep_transhuge_device_private_page()
mm/thp: add THP allocation helper
mm/hmm/test: add self tests for THP migration
nouveau: support THP migration to private memory

drivers/gpu/drm/nouveau/nouveau_dmem.c | 289 +++++++++++-----
drivers/gpu/drm/nouveau/nouveau_svm.c | 11 +-
drivers/gpu/drm/nouveau/nouveau_svm.h | 3 +-
include/linux/gfp.h | 10 +
include/linux/huge_mm.h | 12 +
include/linux/memremap.h | 9 +
include/linux/migrate.h | 2 +
lib/test_hmm.c | 439 +++++++++++++++++++++----
lib/test_hmm_uapi.h | 3 +
mm/huge_memory.c | 177 +++++++---
mm/memory.c | 10 +-
mm/migrate.c | 429 +++++++++++++++++++-----
mm/rmap.c | 2 +-
tools/testing/selftests/vm/hmm-tests.c | 404 +++++++++++++++++++++++
14 files changed, 1519 insertions(+), 281 deletions(-)

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2.20.1