[PATCH 38/53] selftests/mm: hugetlb-mmap: add setup of HugeTLB pages

Mike Rapoport
2026-04-06T14:21:26Z

hugetlb-mmap test fails 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) <rppt@kernel.org>
---
tools/testing/selftests/mm/hugetlb-mmap.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/mm/hugetlb-mmap.c b/tools/testing/selftests/mm/hugetlb-mmap.c
index 5be68fbc36dc..d4edb233101d 100644
--- a/tools/testing/selftests/mm/hugetlb-mmap.c
+++ b/tools/testing/selftests/mm/hugetlb-mmap.c
@@ -107,10 +107,9 @@ int main(int argc, char **argv)
{
size_t hugepage_size;
size_t length = LENGTH;
- int shift = 0;
+ int shift = 0, nr;

ksft_print_header();
- ksft_set_plan(2);

if (argc > 1)
length = atol(argv[1]) << 20;
@@ -126,9 +125,13 @@ int main(int argc, char **argv)
}

/* munmap with fail if the length is not page aligned */
- if (hugepage_size > length)
- length = hugepage_size;
+ length = (length + hugepage_size) & ~(hugepage_size - 1);
+ nr = length / hugepage_size;
+
+ if (!hugetlb_setup_default(nr))
+ ksft_exit_skip("Not enough %lu Kb pages\n", hugepage_size >> 10);

+ ksft_set_plan(2);
ksft_print_msg("Mapping %lu Mbytes\n", (unsigned long)length >> 20);

test_anon_mmap(length, shift);
--
2.53.0