Hi,
Thanks for adding to the series Dev Jain. The series looks good. Thanks for doing such a series. It helps everyone.
For the series: Reviewed-by: Muhammad Usama Anjum usama.anjum@collabora.com
On 2/28/25 9:54 PM, Brendan Jackman wrote:
I never had much luck running mm selftests so I spent a few hours digging into why.
Looks like most of the reason is missing SKIP checks, so this series is just adding a bunch of those that I found. I did not do anything like all of them, just the ones I spotted in gup_longterm, gup_test, mmap, userfaultfd and memfd_secret.
It's a bit unfortunate to have to skip those tests when ftruncate() fails, but I don't have time to dig deep enough into it to actually make them pass. I have observed the issue on 9pfs and heard rumours that NFS has a similar problem.
I'm now able to run these test groups successfully:
- mmap
- gup_test
- compaction
- migration
- page_frag
- userfaultfd
Signed-off-by: Brendan Jackman jackmanb@google.com
Changes in v3:
- Added fix for userfaultfd tests.
- Dropped attempts to use sudo.
- Fixed garbage printf in uffd-stress. (Added EXTRA_CFLAGS=-Werror FORCE_TARGETS=1 to my scripts to prevent such errors happening again).
- Fixed missing newlines in ksft_test_result_skip() calls.
- Link to v2: https://lore.kernel.org/r/20250221-mm-selftests-v2-0-28c4d66383c5@google.com
Changes in v2 (Thanks to Dev for the reviews):
- Improve and cleanup some error messages
- Add some extra SKIPs
- Fix misnaming of nr_cpus variable in uffd tests
- Link to v1: https://lore.kernel.org/r/20250220-mm-selftests-v1-0-9bbf57d64463@google.com
Brendan Jackman (10): selftests/mm: Report errno when things fail in gup_longterm selftests/mm: Skip uffd-stress if userfaultfd not available selftests/mm: Skip uffd-wp-mremap if userfaultfd not available selftests/mm/uffd: Rename nr_cpus -> nr_threads selftests/mm: Print some details when uffd-stress gets bad params selftests/mm: Don't fail uffd-stress if too many CPUs selftests/mm: Skip map_populate on weird filesystems selftests/mm: Skip gup_longerm tests on weird filesystems selftests/mm: Drop unnecessary sudo usage selftests/mm: Ensure uffd-wp-mremap gets pages of each size
tools/testing/selftests/mm/gup_longterm.c | 45 ++++++++++++++++++---------- tools/testing/selftests/mm/map_populate.c | 7 +++++ tools/testing/selftests/mm/run_vmtests.sh | 25 ++++++++++++++-- tools/testing/selftests/mm/uffd-common.c | 8 ++--- tools/testing/selftests/mm/uffd-common.h | 2 +- tools/testing/selftests/mm/uffd-stress.c | 42 ++++++++++++++++---------- tools/testing/selftests/mm/uffd-unit-tests.c | 2 +- tools/testing/selftests/mm/uffd-wp-mremap.c | 5 +++- 8 files changed, 95 insertions(+), 41 deletions(-)
base-commit: 76544811c850a1f4c055aa182b513b7a843868ea change-id: 20250220-mm-selftests-2d7d0542face
Best regards,