linux-kernel - [PATCH v3 0/6] mm/hmm/nouveau: add THP migration to migrate_vma

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Date:   Thu, 5 Nov 2020 16:51:41 -0800
From:   Ralph Campbell <rcampbell@...dia.com>
To:     <linux-mm@...ck.org>, <nouveau@...ts.freedesktop.org>,
        <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Jerome Glisse <jglisse@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Alistair Popple <apopple@...dia.com>,
        Christoph Hellwig <hch@....de>,
        "Jason Gunthorpe" <jgg@...dia.com>,
        Bharata B Rao <bharata@...ux.ibm.com>,
        Zi Yan <ziy@...dia.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Yang Shi <yang.shi@...ux.alibaba.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        "Shuah Khan" <shuah@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Ralph Campbell" <rcampbell@...dia.com>
Subject: [PATCH v3 0/6] mm/hmm/nouveau: add THP migration to migrate_vma_*

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(-)

-- 
2.20.1