69 lines · bash
1#!/bin/bash2# please run as root3 4# Kselftest framework requirement - SKIP code is 4.5ksft_skip=46 7#8# To test memfd_create with hugetlbfs, there needs to be hpages_test9# huge pages free. Attempt to allocate enough pages to test.10#11hpages_test=812 13#14# Get count of free huge pages from /proc/meminfo15#16while read name size unit; do17 if [ "$name" = "HugePages_Free:" ]; then18 freepgs=$size19 fi20done < /proc/meminfo21 22#23# If not enough free huge pages for test, attempt to increase24#25if [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then26 nr_hugepgs=`cat /proc/sys/vm/nr_hugepages`27 hpages_needed=`expr $hpages_test - $freepgs`28 29 if [ $UID != 0 ]; then30 echo "Please run memfd with hugetlbfs test as root"31 exit $ksft_skip32 fi33 34 echo 3 > /proc/sys/vm/drop_caches35 echo $(( $hpages_needed + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages36 while read name size unit; do37 if [ "$name" = "HugePages_Free:" ]; then38 freepgs=$size39 fi40 done < /proc/meminfo41fi42 43#44# If still not enough huge pages available, exit. But, give back any huge45# pages potentially allocated above.46#47if [ $freepgs -lt $hpages_test ]; then48 # nr_hugepgs non-zero only if we attempted to increase49 if [ -n "$nr_hugepgs" ]; then50 echo $nr_hugepgs > /proc/sys/vm/nr_hugepages51 fi52 printf "Not enough huge pages available (%d < %d)\n" \53 $freepgs $needpgs54 exit $ksft_skip55fi56 57#58# Run the hugetlbfs test59#60./memfd_test hugetlbfs61./run_fuse_test.sh hugetlbfs62 63#64# Give back any huge pages allocated for the test65#66if [ -n "$nr_hugepgs" ]; then67 echo $nr_hugepgs > /proc/sys/vm/nr_hugepages68fi69