f0eba714c1
[ Upstream commit d18da7ec3719559d6e74937266d0416e6c7e0b31 ] zram01 uses `free -m` to measure zram memory usage. The results are no sense because they are polluted by all running processes on the system. We Should only calculate the free memory delta for the current process. So use the third field of /sys/block/zram<id>/mm_stat to measure memory usage instead. The file is available since kernel 4.1. orig_data_size(first): uncompressed size of data stored in this disk. compr_data_size(second): compressed size of data stored in this disk mem_used_total(third): the amount of memory allocated for this disk Also remove useless zram cleanup call in zram_fill_fs and so we don't need to cleanup zram twice if fails. Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
77 lines
1.9 KiB
Bash
Executable File
77 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
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#
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# Test creates several zram devices with different filesystems on them.
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# It fills each device with zeros and checks that compression works.
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#
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# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
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# Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
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TCID="zram01"
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ERR_CODE=0
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. ./zram_lib.sh
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# Test will create the following number of zram devices:
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dev_num=1
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# This is a list of parameters for zram devices.
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# Number of items must be equal to 'dev_num' parameter.
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zram_max_streams="2"
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# The zram sysfs node 'disksize' value can be either in bytes,
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# or you can use mem suffixes. But in some old kernels, mem
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# suffixes are not supported, for example, in RHEL6.6GA's kernel
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# layer, it uses strict_strtoull() to parse disksize which does
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# not support mem suffixes, in some newer kernels, they use
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# memparse() which supports mem suffixes. So here we just use
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# bytes to make sure everything works correctly.
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zram_sizes="2097152" # 2MB
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zram_mem_limits="2M"
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zram_filesystems="ext4"
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zram_algs="lzo"
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zram_fill_fs()
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{
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for i in $(seq 0 $(($dev_num - 1))); do
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echo "fill zram$i..."
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local b=0
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while [ true ]; do
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dd conv=notrunc if=/dev/zero of=zram${i}/file \
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oflag=append count=1 bs=1024 status=none \
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> /dev/null 2>&1 || break
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b=$(($b + 1))
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done
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echo "zram$i can be filled with '$b' KB"
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local mem_used_total=`awk '{print $3}' "/sys/block/zram$i/mm_stat"`
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local v=$((100 * 1024 * $b / $mem_used_total))
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if [ "$v" -lt 100 ]; then
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echo "FAIL compression ratio: 0.$v:1"
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ERR_CODE=-1
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return
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fi
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echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
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done
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}
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check_prereqs
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zram_load
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zram_max_streams
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zram_compress_alg
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zram_set_disksizes
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zram_set_memlimit
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zram_makefs
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zram_mount
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zram_fill_fs
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zram_cleanup
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zram_unload
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if [ $ERR_CODE -ne 0 ]; then
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echo "$TCID : [FAIL]"
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else
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echo "$TCID : [PASS]"
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fi
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