name : run_hugetlbfs_test.sh #!/bin/bash # please run as root # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 # # To test memfd_create with hugetlbfs, there needs to be hpages_test # huge pages free. Attempt to allocate enough pages to test. # hpages_test=8 # # Get count of free huge pages from /proc/meminfo # while read name size unit; do if [ "$name" = "HugePages_Free:" ]; then freepgs=$size fi done < /proc/meminfo # # If not enough free huge pages for test, attempt to increase # if [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then nr_hugepgs=`cat /proc/sys/vm/nr_hugepages` hpages_needed=`expr $hpages_test - $freepgs` if [ $UID != 0 ]; then echo "Please run memfd with hugetlbfs test as root" exit $ksft_skip fi echo 3 > /proc/sys/vm/drop_caches echo $(( $hpages_needed + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages while read name size unit; do if [ "$name" = "HugePages_Free:" ]; then freepgs=$size fi done < /proc/meminfo fi # # If still not enough huge pages available, exit. But, give back any huge # pages potentially allocated above. # if [ $freepgs -lt $hpages_test ]; then # nr_hugepgs non-zero only if we attempted to increase if [ -n "$nr_hugepgs" ]; then echo $nr_hugepgs > /proc/sys/vm/nr_hugepages fi printf "Not enough huge pages available (%d < %d)\n" \ $freepgs $needpgs exit $ksft_skip fi # # Run the hugetlbfs test # ./memfd_test hugetlbfs ./run_fuse_test.sh hugetlbfs # # Give back any huge pages allocated for the test # if [ -n "$nr_hugepgs" ]; then echo $nr_hugepgs > /proc/sys/vm/nr_hugepages fi