76 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.0-or-later3# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.4#5# Test creates several zram devices with different filesystems on them.6# It fills each device with zeros and checks that compression works.7#8# Author: Alexey Kodanev <alexey.kodanev@oracle.com>9# Modified: Naresh Kamboju <naresh.kamboju@linaro.org>10 11TCID="zram01"12ERR_CODE=013 14. ./zram_lib.sh15 16# Test will create the following number of zram devices:17dev_num=118# This is a list of parameters for zram devices.19# Number of items must be equal to 'dev_num' parameter.20zram_max_streams="2"21 22# The zram sysfs node 'disksize' value can be either in bytes,23# or you can use mem suffixes. But in some old kernels, mem24# suffixes are not supported, for example, in RHEL6.6GA's kernel25# layer, it uses strict_strtoull() to parse disksize which does26# not support mem suffixes, in some newer kernels, they use27# memparse() which supports mem suffixes. So here we just use28# bytes to make sure everything works correctly.29zram_sizes="2097152" # 2MB30zram_mem_limits="2M"31zram_filesystems="ext4"32zram_algs="lzo"33 34zram_fill_fs()35{36 for i in $(seq $dev_start $dev_end); do37 echo "fill zram$i..."38 local b=039 while [ true ]; do40 dd conv=notrunc if=/dev/zero of=zram${i}/file \41 oflag=append count=1 bs=1024 status=none \42 > /dev/null 2>&1 || break43 b=$(($b + 1))44 done45 echo "zram$i can be filled with '$b' KB"46 47 local mem_used_total=`awk '{print $3}' "/sys/block/zram$i/mm_stat"`48 local v=$((100 * 1024 * $b / $mem_used_total))49 if [ "$v" -lt 100 ]; then50 echo "FAIL compression ratio: 0.$v:1"51 ERR_CODE=-152 return53 fi54 55 echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"56 done57}58 59check_prereqs60zram_load61zram_max_streams62zram_compress_alg63zram_set_disksizes64zram_set_memlimit65zram_makefs66zram_mount67 68zram_fill_fs69zram_cleanup70 71if [ $ERR_CODE -ne 0 ]; then72 echo "$TCID : [FAIL]"73else74 echo "$TCID : [PASS]"75fi76