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This is v4. I think it is ready to go with, unless there are extra requests or comments. Changes in v4: - Since the test can take time, switch to wait_for_completion_timeout() with HZ sleep interval to prevent triggering of the trace about hung task; - Fix clean apply for v4.20 kernel. Changes in v3: - Export __vmalloc_node_range() with _GPL-only prefix; - Add skip cases if the test can not be executed in current environment. That is kselftest framework requirement. Changes in v2: - Code cleanup to make it more simple; - Now __vmalloc_node_range() is exported if CONFIG_TEST_VMALLOC_MODULE=m - Integrate vmalloc test suite into tools/testing/selftests/vm I think it is ready to go with, unless there are more requests or comments. Thank you in advance. Uladzislau Rezki (Sony) (3): vmalloc: export __vmalloc_node_range for CONFIG_TEST_VMALLOC_MODULE vmalloc: add test driver to analyse vmalloc allocator selftests/vm: add script helper for CONFIG_TEST_VMALLOC_MODULE lib/Kconfig.debug | 12 + lib/Makefile | 1 + lib/test_vmalloc.c | 548 +++++++++++++++++++++++++++++ mm/vmalloc.c | 9 + tools/testing/selftests/vm/run_vmtests | 16 + tools/testing/selftests/vm/test_vmalloc.sh | 176 +++++++++ 6 files changed, 762 insertions(+) create mode 100644 lib/test_vmalloc.c create mode 100755 tools/testing/selftests/vm/test_vmalloc.sh