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7170066ecd
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it would be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 6 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154043.007767574@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
90 lines
2.2 KiB
Bash
Executable file
90 lines
2.2 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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local mem_free0=$(free -m | awk 'NR==2 {print $4}')
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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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done
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local mem_free1=$(free -m | awk 'NR==2 {print $4}')
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local used_mem=$(($mem_free0 - $mem_free1))
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local total_size=0
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for sm in $zram_sizes; do
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local s=$(echo $sm | sed 's/M//')
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total_size=$(($total_size + $s))
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done
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echo "zram used ${used_mem}M, zram disk sizes ${total_size}M"
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local v=$((100 * $total_size / $used_mem))
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if [ "$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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zram_cleanup
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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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}
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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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