[PATCH v7 0/7] selftests/mm: skip several tests when thp is not available

Chunyu Hu
2026-03-30T15:15:23Z

There are several tests requires transprarent hugepages, when run on thp
disabled kernel such as realtime kernel, there will be false negative.
Mark those tests as skip when thp is not available.

Changes in v7:
- patch 1 add reviewed-by from Lorenzo
- patch 4 new patch to make ksft_exit_fail_perror variable length
arguments
- patch 5 change to use %.*s to print the buf when error happened
Limit the buflen arg as 2 minimum. Check the error path (numwritten
< 0).
And use the ksft_exit_fail_perror to print the logs in error path

Chagnes in v6:
- patch 3 add reviewed-by from Lorenzo
- patch 4 handle the errno before and after close(), suggested by AI

Changes in v5:
- patch 1, patch 3 updated reviwed-by and acked-by
- patch 4 adds new patch for robust write_file()

Changes in v4:
- patch 1 update to use thp_available instead of thp_is_enabled,
suggested by ai review
- removed reviewed-by and acked-by

Changes in v3:
- patch 1 update commit message to show the log snippet with where the
fail happens, change the 'false positive' to 'false negative'.
Update reviwed by
- patch 2 update reviewed-by
- patch 3 make write_file to void return
- patch 4 and patch 5 updated reviewed-by/acked-by

Changes in v2:
- replace 'false postive' with 'false negative' in cover letter
- patch 1 and patch 2 add reviewed-by/acked-by
- new patch 3 to add write_file() in vm_util as a common helper
- patch 4 removed the {} in if block, removed the write_file helper
rename chunk in v1. Add reviewed-by
- patch 5 move the exit chunk to the front of ksft_print_headers() as
suggested by David. Add review by.

Chunyu Hu (7):
selftests/mm/guard-regions: skip collapse test when thp not enabled
selftests/mm: soft-dirty: skip two tests when thp is not available
selftests/mm: move write_file helper to vm_util
kselftest: make ksft_exit_fail_perror support va args
selftests/mm/vm_util: robust write_file()
selftests/mm: split_huge_page_test: skip the test when thp is not
available
selftests/mm: transhuge_stress: skip the test when thp not available

tools/testing/selftests/kselftest.h | 21 +++++++++--
tools/testing/selftests/mm/guard-regions.c | 4 +++
tools/testing/selftests/mm/soft-dirty.c | 4 ++-
.../selftests/mm/split_huge_page_test.c | 19 +++-------
tools/testing/selftests/mm/thp_settings.c | 35 ++-----------------
tools/testing/selftests/mm/thp_settings.h | 1 -
tools/testing/selftests/mm/transhuge-stress.c | 4 +++
tools/testing/selftests/mm/vm_util.c | 24 +++++++++++++
tools/testing/selftests/mm/vm_util.h | 2 ++
9 files changed, 62 insertions(+), 52 deletions(-)

base-commit: 7aaa8047eafd0bd628065b15757d9b48c5f9c07d
--
2.53.0