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On 4/29/26 2:12 AM, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > cow tests skips HugeTLB tests if there are no free huge pages prepared > by a wrapper script. > > Add setup of HugeTLB pages to the test and make sure that the original > settings are restored on the test exit. > > Signed-off-by: Mike Rapoport (Microsoft) > --- > tools/testing/selftests/mm/cow.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c > index 4321f4208fe3..1df513bf362d 100644 > --- a/tools/testing/selftests/mm/cow.c > +++ b/tools/testing/selftests/mm/cow.c > @@ -1881,21 +1881,21 @@ int main(int argc, char **argv) > > ksft_print_header(); > > + hugepage_save_settings(true, true); Since hugetlb_setup below already calls hugepage_save_settings() internally, perhaps we can change this to hugepage_save_settings(true, false) or simply keep thp_save_settings()? Otherwise we're saving the HugeTLB state twice here and it seems redundant. > + > pagesize = getpagesize(); > pmdsize = read_pmd_pagesize(); > if (pmdsize) { > /* Only if THP is supported. */ > thp_read_settings(&default_settings); > default_settings.hugepages[sz2ord(pmdsize, pagesize)].enabled = THP_INHERIT; > - thp_save_settings(); > thp_push_settings(&default_settings); > > ksft_print_msg("[INFO] detected PMD size: %zu KiB\n", > pmdsize / 1024); > nr_thpsizes = detect_thp_sizes(thpsizes, ARRAY_SIZE(thpsizes)); > } > - nr_hugetlbsizes = detect_hugetlb_page_sizes(hugetlbsizes, > - ARRAY_SIZE(hugetlbsizes)); > + nr_hugetlbsizes = hugetlb_setup(2, hugetlbsizes, ARRAY_SIZE(hugetlbsizes)); > has_huge_zeropage = detect_huge_zeropage(); > > ksft_set_plan(ARRAY_SIZE(anon_test_cases) * tests_per_anon_test_case() +