The test requires at least 2 * (bytes/page_size) hugetlb memory, since we require identical number of hugepages for src and dst location. Fix this.
Along with the above, as explained in patch "selftests/mm/uffd-stress: Make test operate on less hugetlb memory", the racy nature of the test requires that we have some extra number of hugepages left beyond what is required. Therefore, stricten this constraint.
Fixes: 5a6aa60d1823 ("selftests/mm: skip uffd hugetlb tests with insufficient hugepages") Signed-off-by: Dev Jain dev.jain@arm.com --- tools/testing/selftests/mm/uffd-stress.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c index 40af7f67c407..eb0b37f08061 100644 --- a/tools/testing/selftests/mm/uffd-stress.c +++ b/tools/testing/selftests/mm/uffd-stress.c @@ -449,7 +449,7 @@ int main(int argc, char **argv) bytes = atol(argv[2]) * 1024 * 1024;
if (test_type == TEST_HUGETLB && - get_free_hugepages() < bytes / page_size) { + get_free_hugepages() < 2 * (bytes / page_size) + 10) { printf("skip: Skipping userfaultfd... not enough hugepages\n"); return KSFT_SKIP; }