[PATCH v2 01/13] selftests/mm: restore default nr_hugepages value during cleanup in charge_reserved_hugetlb.sh

Sayali Patil
2026-03-12T12:26:18Z

During cleanup, the value of /proc/sys/vm/nr_hugepages is currently being
set to 0. At the end of the test, if all tests pass, the original
nr_hugepages value is restored. However, if any test fails, it remains
set to 0.
With this patch, we ensure that the original nr_hugepages value is
restored during cleanup, regardless of whether the test passes or fails.

Fixes: 7d695b1c3695b ("selftests/mm: save and restore nr_hugepages value")
Reviewed-by: Zi Yan <ziy@nvidia.com>
Signed-off-by: Sayali Patil <sayalip@linux.ibm.com>
---
tools/testing/selftests/mm/charge_reserved_hugetlb.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh
index 447769657634..c9fe68b6fcf9 100755
--- a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh
+++ b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh
@@ -65,7 +65,7 @@ function cleanup() {
if [[ -e $cgroup_path/hugetlb_cgroup_test2 ]]; then
rmdir $cgroup_path/hugetlb_cgroup_test2
fi
- echo 0 >/proc/sys/vm/nr_hugepages
+ echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages
echo CLEANUP DONE
}

--
2.52.0