Introduce selftests to validate the functionality of memory failure. These tests help ensure that memory failure handling for anonymous pages, pagecaches pages works correctly, including proper SIGBUS delivery to user processes, page isolation, and recovery paths.
Currently madvise syscall is used to inject memory failures. And only anonymous pages and pagecaches are tested. More test scenarios, e.g. hugetlb, shmem, thp, will be added. Also more memory failure injecting methods will be supported, e.g. APEI Error INJection, if required. --- Changes in v3: Add HWPOISON_INJECT and MEMORY_FAILURE to config per Mark. Fix kernel test robot warning. Changes in v2: Add some codes to guard pagecache testcases against tmpfs. Testcases for tmpfs will be added soon. Thanks! --- Miaohe Lin (3): selftests/mm: add memory failure anonymous page test selftests/mm: add memory failure clean pagecache test selftests/mm: add memory failure dirty pagecache test MAINTAINERS | 1 + tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/config | 2 + tools/testing/selftests/mm/memory-failure.c | 359 ++++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 21 ++ tools/testing/selftests/mm/vm_util.c | 41 +++ tools/testing/selftests/mm/vm_util.h | 3 + 8 files changed, 429 insertions(+) create mode 100644 tools/testing/selftests/mm/memory-failure.c -- 2.33.0
