[PATCH v3 0/6] mm/hmm/nouveau: add THP migration to migrate_vma_*

Ralph Campbell
2020-11-06T00:51:57Z

This series adds support for transparent huge page migration to
migrate_vma_*() and adds nouveau SVM and HMM selftests as consumers.
Earlier versions were posted previously [1] and [2].

The patches apply cleanly to the linux-mm 5.10.0-rc2 tree. There are a
lot of other THP patches being posted. I don't think there are any
semantic conflicts but there may be some merge conflicts depending on
the order Andrew applies these.

Changes in v3:
Sent the patch ("mm/thp: fix __split_huge_pmd_locked() for migration PMD")
as a separate patch from this series.

Rebased to linux-mm 5.10.0-rc2.

Changes in v2:
Added splitting a THP midway in the migration process:
i.e., in migrate_vma_pages().

[1] https://lore.kernel.org/linux-mm/20200619215649.32297-1-rcampbell@nvidia.com
[2] https://lore.kernel.org/linux-mm/20200902165830.5367-1-rcampbell@nvidia.com

Ralph Campbell (6):
mm/thp: add prep_transhuge_device_private_page()
mm/migrate: move migrate_vma_collect_skip()
mm: support THP migration to device private memory
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 | 437 +++++++++++++++++++++----
lib/test_hmm_uapi.h | 3 +
mm/huge_memory.c | 147 +++++++--
mm/memcontrol.c | 25 +-
mm/memory.c | 10 +-
mm/memremap.c | 4 +-
mm/migrate.c | 429 +++++++++++++++++++-----
mm/rmap.c | 2 +-
tools/testing/selftests/vm/hmm-tests.c | 404 +++++++++++++++++++++++
16 files changed, 1522 insertions(+), 275 deletions(-)

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2.20.1