[PATCH v5 0/2] mm/hmm/test: add self tests for HMM

[Ralph Campbell]

This series adds basic self tests for HMM and mmu interval notifiers so
that changes can be validated. It is based on linux-5.5.0-rc1 and is for
Jason's rdma/hmm tree since I believe he is planning some interval
notifier changes.  Patch 2 was last posted as part of [1] but the other
patches in that series have been merged and this version of the HMM tests
is modified to address Jason's concern over using both process wide MMU
notifiers in combination with MMU interval notifiers. Therefore, patch 1
adds some core functionality to allow intervals to be updated from within
the invalidation() callback so that MMU_NOTIFY_UNMAP events can update
the range being tracked.

[1] https://lore.kernel.org/linux-mm/20191104222141.5173-1-rcampbell@xxxxxxxxxx

Ralph Campbell (2):
  mm/mmu_notifier: make interval notifier updates safe
  mm/hmm/test: add self tests for HMM

 MAINTAINERS                            |    3 +
 include/linux/mmu_notifier.h           |   15 +
 lib/Kconfig.debug                      |   11 +
 lib/Makefile                           |    1 +
 lib/test_hmm.c                         | 1367 ++++++++++++++++++++++++
 mm/mmu_notifier.c                      |  196 +++-
 tools/testing/selftests/vm/.gitignore  |    1 +
 tools/testing/selftests/vm/Makefile    |    3 +
 tools/testing/selftests/vm/config      |    2 +
 tools/testing/selftests/vm/hmm-tests.c | 1360 +++++++++++++++++++++++
 tools/testing/selftests/vm/run_vmtests |   16 +
 tools/testing/selftests/vm/test_hmm.sh |   97 ++
 12 files changed, 3047 insertions(+), 25 deletions(-)
 create mode 100644 lib/test_hmm.c
 create mode 100644 tools/testing/selftests/vm/hmm-tests.c
 create mode 100755 tools/testing/selftests/vm/test_hmm.sh

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2.20.1