[PATCH v9 0/3] mm/hmm/test: add self tests for HMM

From: Ralph Campbell
Date: Fri Apr 17 2020 - 19:55:48 EST


This series adds basic self tests for HMM and are intended for Jason
Gunthorpe's rdma tree since I believe he is planning to make some HMM
related changes that this can help test.

Changes v8 -> v9:
Rebased to linux-5.7.0-rc1.
Moved include/uapi/linux/test_hmm.h to lib/test_hmm_uapi.h
Added calls to release_mem_region() to free device private addresses
Applied Jason's suggested changes for v8.
Added a check for no VMA read access before migrating to device private
memory.

Changes v7 -> v8:
Rebased to Jason's rdma/hmm tree, plus Jason's 6 patch series
"Small hmm_range_fault() cleanups".
Applied a number of changes from Jason's comments.

Changes v6 -> v7:
Rebased to linux-5.6.0-rc6
Reverted back to just using mmu_interval_notifier_insert() and making
this series only introduce HMM self tests.

Changes v5 -> v6:
Rebased to linux-5.5.0-rc6
Refactored mmu interval notifier patches
Converted nouveau to use the new mmu interval notifier API

Changes v4 -> v5:
Added mmu interval notifier insert/remove/update callable from the
invalidate() callback
Updated HMM tests to use the new core interval notifier API

Changes v1 -> v4:
https://lore.kernel.org/linux-mm/20191104222141.5173-1-rcampbell@xxxxxxxxxx

Ralph Campbell (3):
mm/hmm/test: add selftest driver for HMM
mm/hmm/test: add selftests for HMM
MAINTAINERS: add HMM selftests

MAINTAINERS | 3 +
lib/Kconfig.debug | 13 +
lib/Makefile | 1 +
lib/test_hmm.c | 1175 ++++++++++++++++++++
lib/test_hmm_uapi.h | 59 +
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 | 1359 ++++++++++++++++++++++++
tools/testing/selftests/vm/run_vmtests | 16 +
tools/testing/selftests/vm/test_hmm.sh | 97 ++
11 files changed, 2729 insertions(+)
create mode 100644 lib/test_hmm.c
create mode 100644 lib/test_hmm_uapi.h
create mode 100644 tools/testing/selftests/vm/hmm-tests.c
create mode 100755 tools/testing/selftests/vm/test_hmm.sh

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2.25.2