diff options
| -rwxr-xr-x | tools/testing/selftests/mm/va_high_addr_switch.sh | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tools/testing/selftests/mm/va_high_addr_switch.sh b/tools/testing/selftests/mm/va_high_addr_switch.sh index 325de53966b6..a7d4b02b21dd 100755 --- a/tools/testing/selftests/mm/va_high_addr_switch.sh +++ b/tools/testing/selftests/mm/va_high_addr_switch.sh @@ -9,6 +9,7 @@ # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 +orig_nr_hugepages=0 skip() { @@ -76,5 +77,41 @@ check_test_requirements() esac } +save_nr_hugepages() +{ + orig_nr_hugepages=$(cat /proc/sys/vm/nr_hugepages) +} + +restore_nr_hugepages() +{ + echo "$orig_nr_hugepages" > /proc/sys/vm/nr_hugepages +} + +setup_nr_hugepages() +{ + local needpgs=$1 + while read -r name size unit; do + if [ "$name" = "HugePages_Free:" ]; then + freepgs="$size" + break + fi + done < /proc/meminfo + if [ "$freepgs" -ge "$needpgs" ]; then + return + fi + local hpgs=$((orig_nr_hugepages + needpgs)) + echo $hpgs > /proc/sys/vm/nr_hugepages + + local nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages) + if [ "$nr_hugepgs" != "$hpgs" ]; then + restore_nr_hugepages + skip "$0: no enough hugepages for testing" + fi +} + check_test_requirements +save_nr_hugepages +# 4 keep_mapped pages, and one for tmp usage +setup_nr_hugepages 5 ./va_high_addr_switch --run-hugetlb +restore_nr_hugepages |