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- #!/bin/sh
- # Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
- # Copyright (c) 2019 Petr Vorel <pvorel@suse.cz>
- # Author: Alexey Kodanev <alexey.kodanev@oracle.com>
- #
- # Test creates several zram devices with different filesystems on them.
- # It fills each device with zeros and checks that compression works.
- TST_CNT=7
- TST_TESTFUNC="do_test"
- TST_NEEDS_CMDS="awk bc dd"
- . zram_lib.sh
- # Test will create the following number of zram devices:
- dev_num=4
- # This is a list of parameters for zram devices.
- # Number of items must be equal to 'dev_num' parameter.
- zram_max_streams="2 3 5 8"
- FS_SIZE="402653184"
- FS_TYPE="btrfs"
- RAM_SIZE=$(awk '/MemTotal:/ {print $2}' /proc/meminfo)
- if [ "$RAM_SIZE" -lt 1048576 ]; then
- tst_res TINFO "not enough space for Btrfs"
- FS_SIZE="26214400"
- FS_TYPE="ext2"
- fi
- # The zram sysfs node 'disksize' value can be either in bytes,
- # or you can use mem suffixes. But in some old kernels, mem
- # suffixes are not supported, for example, in RHEL6.6GA's kernel
- # layer, it uses strict_strtoull() to parse disksize which does
- # not support mem suffixes, in some newer kernels, they use
- # memparse() which supports mem suffixes. So here we just use
- # bytes to make sure everything works correctly.
- zram_sizes="26214400 26214400 26214400 $FS_SIZE"
- zram_mem_limits="25M 25M 25M $((FS_SIZE/1024/1024))M"
- zram_filesystems="ext3 ext4 xfs $FS_TYPE"
- zram_fill_fs()
- {
- for i in $(seq 0 $(($dev_num - 1))); do
- tst_res TINFO "filling zram$i (it can take long time)"
- local b=0
- while true; do
- dd conv=notrunc if=/dev/zero of=zram${i}/file \
- oflag=append count=1 bs=1024 status=none \
- >/dev/null 2>err.txt || break
- b=$(($b + 1))
- done
- if [ $b -eq 0 ]; then
- [ -s err.txt ] && tst_res TWARN "dd error: $(cat err.txt)"
- tst_brk TBROK "cannot fill zram $i"
- fi
- tst_res TPASS "zram$i was filled with '$b' KB"
- if [ ! -f "/sys/block/zram$i/mm_stat" ]; then
- if [ $i -eq 0 ]; then
- tst_res TCONF "zram compression ratio test requires zram mm_stat sysfs file"
- fi
- continue
- fi
- local compr_size=`awk '{print $2}' "/sys/block/zram$i/mm_stat"`
- local v=$((100 * 1024 * $b / $compr_size))
- local r=`echo "scale=2; $v / 100 " | bc`
- if [ "$v" -lt 100 ]; then
- tst_res TFAIL "compression ratio: $r:1"
- break
- fi
- tst_res TPASS "compression ratio: $r:1"
- done
- }
- do_test()
- {
- case $1 in
- 1) zram_max_streams;;
- 2) zram_compress_alg;;
- 3) zram_set_disksizes;;
- 4) zram_set_memlimit;;
- 5) zram_makefs;;
- 6) zram_mount;;
- 7) zram_fill_fs;;
- esac
- }
- tst_run
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