On 10 Mar 2026, at 5:49, Sayali Patil wrote: > The uffd-wp-mremap test requires the UFFD_FEATURE_PAGEFAULT_FLAG_WP > capability. On systems where userfaultfd write-protect is > not supported, uffd_register() fails and the test reports failures. > > Check for the required feature at startup and skip the test when the > UFFD_FEATURE_PAGEFAULT_FLAG_WP capability is not present, > preventing false failures on unsupported configurations. > > Before patch: > running ./uffd-wp-mremap > ------------------------ > [INFO] detected THP size: 256 KiB > [INFO] detected THP size: 512 KiB > [INFO] detected THP size: 1024 KiB > [INFO] detected THP size: 2048 KiB > [INFO] detected hugetlb page size: 2048 KiB > [INFO] detected hugetlb page size: 1048576 KiB > 1..24 > [RUN] test_one_folio(size=65536, private=false, swapout=false, > hugetlb=false) > not ok 1 uffd_register() failed > [RUN] test_one_folio(size=65536, private=true, swapout=false, > hugetlb=false) > not ok 2 uffd_register() failed > [RUN] test_one_folio(size=65536, private=false, swapout=true, > hugetlb=false) > not ok 3 uffd_register() failed > [RUN] test_one_folio(size=65536, private=true, swapout=true, > hugetlb=false) > not ok 4 uffd_register() failed > [RUN] test_one_folio(size=262144, private=false, swapout=false, > hugetlb=false) > not ok 5 uffd_register() failed > [RUN] test_one_folio(size=524288, private=false, swapout=false, > hugetlb=false) > not ok 6 uffd_register() failed > . > . > . > Bail out! 24 out of 24 tests failed > Totals: pass:0 fail:24 xfail:0 xpass:0 skip:0 error:0 > [FAIL] > not ok 1 uffd-wp-mremap # exit=1 > > After patch: > running ./uffd-wp-mremap > ------------------------ > 1..0 # SKIP uffd-wp feature not supported > [SKIP] > ok 1 uffd-wp-mremap # SKIP > > Signed-off-by: Sayali Patil <[email protected]> > --- > tools/testing/selftests/mm/uffd-wp-mremap.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > LGTM.
Acked-by: Zi Yan <[email protected]> Best Regards, Yan, Zi
