On 2026-04-28 16:41, Mike Rapoport wrote:
From: "Mike Rapoport (Microsoft)" <[email protected]>Hi, There's a lot of dancing around HugeTLB settings in run_vmtests.sh. Some test need just a few default huge pages, some require at least 256 MB, and some just skip lots of tests if huge pages of all supported sizes are not available. The goal of this set is to make tests deal with HugeTLB setup and teardown. There are already convenient helpers that allow easy reading and writing of /proc and /sysfs, so adding a few APIs that will detect and update HugeTLB settings shouldn't be a big deal. But these nice helpers use kselftest framework, and many of HugeTLB (and even THP) test don't, so as a result this patchset also includes a lot of churn for conversion of those tests to kselftest framework (patches 7-19). The series break out: patches 1-5: small fixes patch 6: merge of hugetlb mmap tests patch 7: renaming of hugepage-* to hugetlb-* patches 8-20: mechanical conversion to kselftest framework patches 21-27: extension of thp_settings to hugepage_settings to also include HugeTLB helpers patches 28-29: add helpers for setting up SHM limits in hugetlb-shm and thuge-gen tests patches 30-52: integrate the new APIs in all the tests that use HugeTLB patches 53-54: drop HugeTLB setup from run_vmtests.sh v3 changes: * add patches that fix cleanup of fork()ed processes in migration test * drop MADV_REMOVE changes to khugepage test * properly setup memfd for non-default hugepages in hugetlb-mmap test * add forgotten hugetlb_save_settings() to hugetlb_setup() * fixes for ksft reporting * rebase on v7.1-rc1 * add more tags, thanks everyone!
I reran my testing that previously reveled some of the bugs I reported for v2, they pass now. I ran them on an x86-64 guest with 88 vCPUs and also on a small s390 guest. The suite as a whole works as before (I also checked the HugeTLB state gets restored for each test). I'll be reviewing some of the individual patches, but for the suite as whole: Tested-by: Luiz Capitulino <[email protected]>
v2: https://lore.kernel.org/all/[email protected] * fix hugetlb mmap tests to actually test file mappings * increase maximal tests number in khugepaged * add tags, thanks everyone! v1: https://lore.kernel.org/all/[email protected] Mike Rapoport (Microsoft) (54): selftests/mm: hugetlb-read-hwpoison: add SIGBUS handler selftests/mm: migration: don't assume hupe page is TWOMEG selftests/mm: migration: make nthreads represent number of working threads selftests/mm: migration: properly cleanup fork()ed processes selftests/mm: run_vmtests.sh: don't gate THP and KSM tests on HAVE_HUGEPAGES selftests/mm: merge map_hugetlb into hugepage-mmap selftests/mm: rename hugepage-* tests to hugetlb-* selftests/mm: hugetlb-shm: use kselftest framework selftests/mm: hugetlb-vmemmap: use kselftest framework selftests/mm: hugetlb-madvise: use kselftest framework selftests/mm: hugetlb_madv_vs_map: use kselftest framework selftests/mm: hugetlb-read-hwpoison: use kselftest framework selftests/mm: khugepaged: group tests in an array selftests/mm: khugepaged: use ksefltest framework selftests/mm: ksm_tests: use kselftest framework selftests/mm: protection_keys: use descriptive test names in TAP output selftests/mm: protection_keys: use kselftest framework selftests/mm: uffd-stress: use kselftest framework selftests/mm: uffd-unit-tests: use kselftest framework selftests/mm: va_high_addr_switch: use kselftest framework selftests/mm: add atexit() and signal handlers to thp_settings selftests/mm: rename thp_settings.[ch] to hugepage_settings.[ch] selftests/mm: move HugeTLB helpers to hugepage_settings selftests/mm: hugepage_settings: use unsigned long in detect_hugetlb_page_size selftests/mm: hugepage_settings: add APIs to get and set nr_hugepages selftests/mm: hugepage_settings: rename get_free_hugepages() selftests/mm: hugepage_settings: add APIs for HugeTLB setup and teardown selftests/mm: move read_file(), read_num() and write_num() to vm_util selftests/mm: vm_util: add helpers to set and restore shm limits selftests/mm: compaction_test: use HugeTLB helpers ... selftests/mm: cow: add setup of HugeTLB pages selftests/mm: gup_longterm: add setup of HugeTLB pages selftests/mm: gup_test: add setup of HugeTLB pages selftests/mm: hmm-tests: add setup of HugeTLB pages selftests/mm: hugepage_dio: add setup of HugeTLB pages selftests/mm: hugetlb_fault_after_madv: add setup of HugeTLB pages selftests/mm: hugetlb-madvise: add setup of HugeTLB pages selftests/mm: hugetlb_madv_vs_map: add setup of HugeTLB pages selftests/mm: hugetlb-mmap: add setup of HugeTLB pages selftests/mm: hugetlb-mremap: add setup of HugeTLB pages selftests/mm: hugetlb-shm: add setup of HugeTLB pages selftests/mm: hugetlb-soft-online: add setup of HugeTLB pages selftests/mm: hugetlb-vmemmap: add setup of HugeTLB pages selftests/mm: migration: add setup of HugeTLB pages selftests/mm: pagemap_ioctl: add setup of HugeTLB pages selftests/mm: protection_keys: use library code for HugeTLB setup selftests/mm: thuge-gen: add setup of HugeTLB pages selftests/mm: uffd-stress: use hugetlb_save and alloc huge pages selftests/mm: uffd-unit-tests: add setup of HugeTLB pages selftests/mm: uffd-wp-mremap: add setup of HugeTLB pages selftests/mm: va_high_addr_switch: add setup of HugeTLB pages selftests/mm: va_high_addr_switch.sh: drop huge pages setup selftests/mm: run_vmtests.sh: free memory if available memory is low selftests/mm: run_vmtests.sh: drop detection and setup of HugeTLB tools/testing/selftests/mm/.gitignore | 4 + tools/testing/selftests/mm/Makefile | 13 +- tools/testing/selftests/mm/compaction_test.c | 113 +----- tools/testing/selftests/mm/cow.c | 29 +- .../selftests/mm/folio_split_race_test.c | 2 +- tools/testing/selftests/mm/guard-regions.c | 2 +- tools/testing/selftests/mm/gup_longterm.c | 3 +- tools/testing/selftests/mm/gup_test.c | 12 + tools/testing/selftests/mm/hmm-tests.c | 24 +- tools/testing/selftests/mm/hugepage-mmap.c | 78 ---- .../{thp_settings.c => hugepage_settings.c} | 286 +++++++++++-- .../{thp_settings.h => hugepage_settings.h} | 75 +++- tools/testing/selftests/mm/hugetlb-madvise.c | 209 ++++------ tools/testing/selftests/mm/hugetlb-mmap.c | 145 +++++++ .../{hugepage-mremap.c => hugetlb-mremap.c} | 13 +- .../selftests/mm/hugetlb-read-hwpoison.c | 123 +++--- .../mm/{hugepage-shm.c => hugetlb-shm.c} | 64 +-- .../selftests/mm/hugetlb-soft-offline.c | 45 +-- .../{hugepage-vmemmap.c => hugetlb-vmemmap.c} | 46 +-- tools/testing/selftests/mm/hugetlb_dio.c | 15 +- .../selftests/mm/hugetlb_fault_after_madv.c | 7 +- .../selftests/mm/hugetlb_madv_vs_map.c | 22 +- tools/testing/selftests/mm/khugepaged.c | 380 ++++++++---------- tools/testing/selftests/mm/ksm_tests.c | 182 ++++----- tools/testing/selftests/mm/map_hugetlb.c | 88 ---- tools/testing/selftests/mm/migration.c | 152 ++++--- tools/testing/selftests/mm/pagemap_ioctl.c | 13 +- tools/testing/selftests/mm/pkey-helpers.h | 6 +- .../testing/selftests/mm/prctl_thp_disable.c | 2 +- tools/testing/selftests/mm/protection_keys.c | 130 +++--- tools/testing/selftests/mm/run_vmtests.sh | 177 ++------ tools/testing/selftests/mm/soft-dirty.c | 2 +- .../selftests/mm/split_huge_page_test.c | 2 +- tools/testing/selftests/mm/thuge-gen.c | 80 +--- tools/testing/selftests/mm/transhuge-stress.c | 2 +- tools/testing/selftests/mm/uffd-common.h | 1 + tools/testing/selftests/mm/uffd-stress.c | 44 +- tools/testing/selftests/mm/uffd-unit-tests.c | 110 +++-- tools/testing/selftests/mm/uffd-wp-mremap.c | 12 +- .../selftests/mm/va_high_addr_switch.c | 42 +- .../selftests/mm/va_high_addr_switch.sh | 41 +- tools/testing/selftests/mm/vm_util.c | 133 +++--- tools/testing/selftests/mm/vm_util.h | 15 +- 43 files changed, 1424 insertions(+), 1520 deletions(-) delete mode 100644 tools/testing/selftests/mm/hugepage-mmap.c rename tools/testing/selftests/mm/{thp_settings.c => hugepage_settings.c} (60%) rename tools/testing/selftests/mm/{thp_settings.h => hugepage_settings.h} (55%) create mode 100644 tools/testing/selftests/mm/hugetlb-mmap.c rename tools/testing/selftests/mm/{hugepage-mremap.c => hugetlb-mremap.c} (94%) rename tools/testing/selftests/mm/{hugepage-shm.c => hugetlb-shm.c} (57%) rename tools/testing/selftests/mm/{hugepage-vmemmap.c => hugetlb-vmemmap.c} (76%) delete mode 100644 tools/testing/selftests/mm/map_hugetlb.c base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731 -- 2.53.0
