This series fixes correctness issues in mremap_test, simplifies its test infrastructure and strengthens validation of remapped mappings.
Patches 1-3 remove unused command line handling, unnecessary cleanup checks and redundant errno handling. Patch 4 converts the test to use kselftest helpers and removes manual failure tracking. Patches 5-8 fix handling of unavailable userfaultfd support, unexpected mremap() successes, data-corruption failures and cleanup after mmap() failures. Patch 9 removes perf tests and timing infrastructure. Patches 10 and 11 replace threshold-based random-data validation with sampled validation and a deterministic data pattern. Patch 12 strengthens multi VMA validation by also checking the mapping state of holes after remapping. Changes in v2: - Add a first patch to remove command-line options - Add a second patch to remove munmap() checks from cleanup paths - Add a third patch to simplify errno handling - Drop the "correct multiple VMA range size" patch - Add an eighth patch to fix cleanup after target mmap() failures - Replace fully populating and validating large mappings with populating and validating 10 pages each from the start, middle and end - Extend multi VMA strengthening to userfaultfd multi VMA test - Fix minor formatting issues Previous versions: v1: https://lore.kernel.org/all/[email protected]/ --- Sarthak Sharma (12): selftests/mm: mremap_test: remove command line options selftests/mm: mremap_test: drop munmap() checks from cleanup paths selftests/mm: mremap_test: simplify errno handling selftests/mm: mremap_test: use kselftest helpers selftests/mm: mremap_test: skip test when userfaultfd is unavailable selftests/mm: mremap_test: fail unexpected mremap successes selftests/mm: mremap_test: fail on data corruption selftests/mm: mremap_test: handle cleanup after mmap failures selftests/mm: mremap_test: remove perf tests and timing selftests/mm: mremap_test: replace validation threshold with sampled checks selftests/mm: mremap_test: replace random data with deterministic pattern selftests/mm: mremap_test: strengthen multi VMA validation tools/testing/selftests/mm/mremap_test.c | 701 ++++++++++------------- 1 file changed, 291 insertions(+), 410 deletions(-) -- 2.53.0
