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#!/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
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