Handle the case that hugetlbfs is not supported. To make it easier for debugging.

On a system that does not support hugetlbfs. There will be no such HugePages_Free entry in /proc/meminfo. And consequently freepgs will be empty. The huge pages availability check will fail and the test will be started anyway: ./run_hugetlbfs_test.sh: line 47: [: -lt: unary operator expected ./run_hugetlbfs_test.sh: line 60: 12577 Aborted (core dumped) ./memfd_test hugetlbfs Aborted (core dumped)

Signed-off-by: Po-Hsu Lin po-hsu.lin@canonical.com --- tools/testing/selftests/memfd/run_hugetlbfs_test.sh | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/memfd/run_hugetlbfs_test.sh b/tools/testing/selftests/memfd/run_hugetlbfs_test.sh index fb633eeb0290..9bbd30ced9c5 100755 --- a/tools/testing/selftests/memfd/run_hugetlbfs_test.sh +++ b/tools/testing/selftests/memfd/run_hugetlbfs_test.sh @@ -19,10 +19,13 @@ while read name size unit; do fi done < /proc/meminfo

+if [ -z "$freepgs" ]; then + echo "hugetlbfs not supported, test skipped." + exit $ksft_skip # # If not enough free huge pages for test, attempt to increase # -if [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then +elif [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then nr_hugepgs=`cat /proc/sys/vm/nr_hugepages` hpages_needed=`expr $hpages_test - $freepgs`