linux_kernel/tools/testing/selftests/vm/run_vmtests

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#please run as root

mnt=./huge
exitcode=0

#get huge pagesize and freepages from /proc/meminfo
while read name size unit; do
	if [ "$name" = "HugePages_Free:" ]; then
		freepgs=$size
	fi
	if [ "$name" = "Hugepagesize:" ]; then
		hpgsize_KB=$size
	fi
done < /proc/meminfo

# Simple hugetlbfs tests have a hardcoded minimum requirement of
# huge pages totaling 256MB (262144KB) in size.  The userfaultfd
# hugetlb test requires a minimum of 2 * nr_cpus huge pages.  Take
# both of these requirements into account and attempt to increase
# number of huge pages available.
nr_cpus=$(nproc)
hpgsize_MB=$((hpgsize_KB / 1024))
half_ufd_size_MB=$((((nr_cpus * hpgsize_MB + 127) / 128) * 128))
needmem_KB=$((half_ufd_size_MB * 2 * 1024))

#set proper nr_hugepages
if [ -n "$freepgs" ] && [ -n "$hpgsize_KB" ]; then
	nr_hugepgs=`cat /proc/sys/vm/nr_hugepages`
	needpgs=$((needmem_KB / hpgsize_KB))
	tries=2
	while [ $tries -gt 0 ] && [ $freepgs -lt $needpgs ]; do
		lackpgs=$(( $needpgs - $freepgs ))
		echo 3 > /proc/sys/vm/drop_caches
		echo $(( $lackpgs + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages
		if [ $? -ne 0 ]; then
			echo "Please run this test as root"
			exit 1
		fi
		while read name size unit; do
			if [ "$name" = "HugePages_Free:" ]; then
				freepgs=$size
			fi
		done < /proc/meminfo
		tries=$((tries - 1))
	done
	if [ $freepgs -lt $needpgs ]; then
		printf "Not enough huge pages available (%d < %d)\n" \
		       $freepgs $needpgs
		exit 1
	fi
else
	echo "no hugetlbfs support in kernel?"
	exit 1
fi

mkdir $mnt
mount -t hugetlbfs none $mnt

echo "---------------------"
echo "running hugepage-mmap"
echo "---------------------"
./hugepage-mmap
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

shmmax=`cat /proc/sys/kernel/shmmax`
shmall=`cat /proc/sys/kernel/shmall`
echo 268435456 > /proc/sys/kernel/shmmax
echo 4194304 > /proc/sys/kernel/shmall
echo "--------------------"
echo "running hugepage-shm"
echo "--------------------"
./hugepage-shm
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi
echo $shmmax > /proc/sys/kernel/shmmax
echo $shmall > /proc/sys/kernel/shmall

echo "-------------------"
echo "running map_hugetlb"
echo "-------------------"
./map_hugetlb
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

echo "NOTE: The above hugetlb tests provide minimal coverage.  Use"
echo "      https://github.com/libhugetlbfs/libhugetlbfs.git for"
echo "      hugetlb regression testing."

echo "-------------------"
echo "running userfaultfd"
echo "-------------------"
./userfaultfd anon 128 32
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

echo "---------------------------"
echo "running userfaultfd_hugetlb"
echo "---------------------------"
# Test requires source and destination huge pages.  Size of source
# (half_ufd_size_MB) is passed as argument to test.
./userfaultfd hugetlb $half_ufd_size_MB 32 $mnt/ufd_test_file
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi
rm -f $mnt/ufd_test_file

echo "-------------------------"
echo "running userfaultfd_shmem"
echo "-------------------------"
./userfaultfd shmem 128 32
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

#cleanup
umount $mnt
rm -rf $mnt
echo $nr_hugepgs > /proc/sys/vm/nr_hugepages

echo "-----------------------"
echo "running compaction_test"
echo "-----------------------"
./compaction_test
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

echo "----------------------"
echo "running on-fault-limit"
echo "----------------------"
sudo -u nobody ./on-fault-limit
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

echo "--------------------"
echo "running mlock2-tests"
echo "--------------------"
./mlock2-tests
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

echo "-----------------------------"
echo "running virtual_address_range"
echo "-----------------------------"
./virtual_address_range
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi

echo "-----------------------------"
echo "running virtual address 128TB switch test"
echo "-----------------------------"
./va_128TBswitch
if [ $? -ne 0 ]; then
    echo "[FAIL]"
    exitcode=1
else
    echo "[PASS]"
fi

exit $exitcode