Several MM selftests report failures when the test environment lacks an underlying prerequisite, such as fallocate() support, MADV_REMOVE, local page-cache semantics, or swap.
This series converts those unsupported cases to SKIP while preserving failures for unexpected errors. It also allows migration tests to retry transient move_pages() failures. Tested on an arm64 Ampere system using an NFS root filesystem. The MM selftest run completed without failures or errors. Also verified on x86_64 to ensure the changes do not cause unexpected errors. Changes since v2: - Explain why the hard dirty-page variant is skipped on NFS. - Return -2 when the page is not on the target node. Changes since v1: - Print swapout diagnostics before reporting no-swap skips. - Limit the NFS skip to the hard dirty-page variant. - Retry per-page failures for the full runtime. - Verify that both alternating NUMA targets are reached. Muhammad Usama Anjum (5): selftests/mm: skip COW tmpfile cases when fallocate() is unsupported selftests/mm: skip guard hole-punch test if MADV_REMOVE is unsupported selftests/mm: skip khugepaged swap tests without swap selftests/mm: skip hard dirty page-cache test on NFS selftests/mm: retry migration failures for the full runtime tools/testing/selftests/mm/cow.c | 9 +++-- tools/testing/selftests/mm/guard-regions.c | 10 ++++-- tools/testing/selftests/mm/khugepaged.c | 38 +++++++++++++++++++-- tools/testing/selftests/mm/memory-failure.c | 14 ++++++-- tools/testing/selftests/mm/migration.c | 37 +++++++++++--------- 5 files changed, 82 insertions(+), 26 deletions(-) -- 2.47.3
