From: Naresh Kamboju <[email protected]>
zram.sh: sanity check of CONFIG_ZRAM and run zram01.sh and zram02.sh
zram01.sh: creates general purpose ram disks with different filesystems
zram02.sh: creates block device for swap
zram_lib.sh: create library with initialization/cleanup functions
README: ZRAM introduction and Kconfig required.
Makefile: To run zram tests
From: Alexey Kodanev <[email protected]>
CC: Shuah Khan <[email protected]>
CC: Tyler Baker <[email protected]>
CC: Milosz Wasilewski <[email protected]>
Signed-off-by: Naresh Kamboju <[email protected]>
Signed-off-by: Alexey Kodanev <[email protected]>
---
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/zram/Makefile | 12 ++
tools/testing/selftests/zram/README | 40 ++++++
tools/testing/selftests/zram/zram.sh | 22 +++
tools/testing/selftests/zram/zram01.sh | 98 ++++++++++++++
tools/testing/selftests/zram/zram02.sh | 53 ++++++++
tools/testing/selftests/zram/zram_lib.sh | 222 +++++++++++++++++++++++++++++++
7 files changed, 448 insertions(+)
create mode 100644 tools/testing/selftests/zram/Makefile
create mode 100644 tools/testing/selftests/zram/README
create mode 100755 tools/testing/selftests/zram/zram.sh
create mode 100755 tools/testing/selftests/zram/zram01.sh
create mode 100755 tools/testing/selftests/zram/zram02.sh
create mode 100755 tools/testing/selftests/zram/zram_lib.sh
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 24ae9e8..9763dd9 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -22,6 +22,7 @@ endif
TARGETS += user
TARGETS += vm
TARGETS += x86
+TARGETS += zram
#Please keep the TARGETS list alphabetically sorted
# Run "make quicktest=1 run_tests" or
# "make quicktest=1 kselftest from top level Makefile
diff --git a/tools/testing/selftests/zram/Makefile b/tools/testing/selftests/zram/Makefile
new file mode 100644
index 0000000..ec45513
--- /dev/null
+++ b/tools/testing/selftests/zram/Makefile
@@ -0,0 +1,12 @@
+all:
+
+TEST_PROGS := zram.sh
+TEST_FILES := zram01.sh zram02.sh zram_lib.sh
+
+include ../lib.mk
+
+run_tests:
+ @/bin/bash ./zram.sh
+
+clean:
+ $(RM) err.log
diff --git a/tools/testing/selftests/zram/README b/tools/testing/selftests/zram/README
new file mode 100644
index 0000000..eb17917
--- /dev/null
+++ b/tools/testing/selftests/zram/README
@@ -0,0 +1,40 @@
+zram: Compressed RAM based block devices
+----------------------------------------
+* Introduction
+
+The zram module creates RAM based block devices named /dev/zram<id>
+(<id> = 0, 1, ...). Pages written to these disks are compressed and stored
+in memory itself. These disks allow very fast I/O and compression provides
+good amounts of memory savings. Some of the usecases include /tmp storage,
+use as swap disks, various caches under /var and maybe many more :)
+
+Statistics for individual zram devices are exported through sysfs nodes at
+/sys/block/zram<id>/
+
+Kconfig required:
+CONFIG_ZRAM=y
+CONFIG_ZRAM_LZ4_COMPRESS=y
+CONFIG_ZPOOL=y
+CONFIG_ZSMALLOC=y
+
+ZRAM Testcases
+--------------
+zram_lib.sh: create library with initialization/cleanup functions
+zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02
+
+Two functional tests: zram01 and zram02:
+zram01.sh: creates general purpose ram disks with ext4 filesystems
+zram02.sh: creates block device for swap
+
+Commands required for testing:
+ - bc
+ - dd
+ - free
+ - awk
+ - mkswap
+ - swapon
+ - swapoff
+ - mkfs/ mkfs.ext4
+
+For more information please refer:
+kernel-source-tree/Documentation/blockdev/zram.txt
diff --git a/tools/testing/selftests/zram/zram.sh b/tools/testing/selftests/zram/zram.sh
new file mode 100755
index 0000000..be219fd
--- /dev/null
+++ b/tools/testing/selftests/zram/zram.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+TCID="zram.sh"
+
+run_zram () {
+echo "--------------------"
+echo "running zram tests"
+echo "--------------------"
+./zram01.sh
+./zram02.sh
+}
+
+# check zram module exists
+MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
+if [ -f $MODULE_PATH ]; then
+ run_zram
+elif [ -b /dev/zram0 ]; then
+ run_zram
+else
+ echo "$TCID : No zram.ko module or /dev/zram0 device file not found"
+ echo "$TCID : CONFIG_ZRAM is not set"
+ exit 1
+fi
diff --git a/tools/testing/selftests/zram/zram01.sh b/tools/testing/selftests/zram/zram01.sh
new file mode 100755
index 0000000..2a2475d
--- /dev/null
+++ b/tools/testing/selftests/zram/zram01.sh
@@ -0,0 +1,98 @@
+#!/bin/bash
+# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# Test creates several zram devices with different filesystems on them.
+# It fills each device with zeros and checks that compression works.
+#
+# Author: Alexey Kodanev <[email protected]>
+# Modified: Naresh Kamboju <[email protected]>
+
+TCID="zram01"
+ERR_CODE=0
+
+. ./zram_lib.sh
+
+# Test will create the following number of zram devices:
+dev_num=1
+# This is a list of parameters for zram devices.
+# Number of items must be equal to 'dev_num' parameter.
+zram_max_streams="2"
+
+# The zram sysfs node 'disksize' value can be either in bytes,
+# or you can use mem suffixes. But in some old kernels, mem
+# suffixes are not supported, for example, in RHEL6.6GA's kernel
+# layer, it uses strict_strtoull() to parse disksize which does
+# not support mem suffixes, in some newer kernels, they use
+# memparse() which supports mem suffixes. So here we just use
+# bytes to make sure everything works correctly.
+zram_sizes="2097152" # 2MB
+zram_mem_limits="2M"
+zram_filesystems="ext4"
+zram_algs="lzo"
+
+zram_fill_fs()
+{
+ local mem_free0=$(free -m | awk 'NR==2 {print $4}')
+
+ for i in $(seq 0 $(($dev_num - 1))); do
+ echo "fill zram$i..."
+ local b=0
+ while [ true ]; do
+ dd conv=notrunc if=/dev/zero of=zram${i}/file \
+ oflag=append count=1 bs=1024 status=none \
+ > /dev/null 2>&1 || break
+ b=$(($b + 1))
+ done
+ echo "zram$i can be filled with '$b' KB"
+ done
+
+ local mem_free1=$(free -m | awk 'NR==2 {print $4}')
+ local used_mem=$(($mem_free0 - $mem_free1))
+
+ local total_size=0
+ for sm in $zram_sizes; do
+ local s=$(echo $sm | sed 's/M//')
+ total_size=$(($total_size + $s))
+ done
+
+ echo "zram used ${used_mem}M, zram disk sizes ${total_size}M"
+
+ local v=$((100 * $total_size / $used_mem))
+
+ if [ "$v" -lt 100 ]; then
+ echo "FAIL compression ratio: 0.$v:1"
+ ERR_CODE=-1
+ zram_cleanup
+ return
+ fi
+
+ echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
+}
+
+zram_load
+zram_max_streams
+zram_compress_alg
+zram_set_disksizes
+zram_set_memlimit
+zram_makefs
+zram_mount
+
+zram_fill_fs
+zram_cleanup
+zram_unload
+
+if [ $ERR_CODE -ne 0 ]; then
+ echo "$TCID : [FAIL]"
+else
+ echo "$TCID : [PASS]"
+fi
diff --git a/tools/testing/selftests/zram/zram02.sh b/tools/testing/selftests/zram/zram02.sh
new file mode 100755
index 0000000..96e82dc
--- /dev/null
+++ b/tools/testing/selftests/zram/zram02.sh
@@ -0,0 +1,53 @@
+#!/bin/bash
+# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
+#
+# 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.
+#
+# Test checks that we can create swap zram device.
+#
+# Author: Alexey Kodanev <[email protected]>
+# Modified: Naresh Kamboju <[email protected]>
+
+TCID="zram02"
+ERR_CODE=0
+
+. ./zram_lib.sh
+
+# Test will create the following number of zram devices:
+dev_num=1
+# This is a list of parameters for zram devices.
+# Number of items must be equal to 'dev_num' parameter.
+zram_max_streams="2"
+
+# 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="1048576" # 1M
+zram_mem_limits="1M"
+
+zram_load
+zram_max_streams
+zram_set_disksizes
+zram_set_memlimit
+zram_makeswap
+zram_swapoff
+zram_cleanup
+zram_unload
+
+if [ $ERR_CODE -ne 0 ]; then
+ echo "$TCID : [FAIL]"
+else
+ echo "$TCID : [PASS]"
+fi
diff --git a/tools/testing/selftests/zram/zram_lib.sh b/tools/testing/selftests/zram/zram_lib.sh
new file mode 100755
index 0000000..3b6abf1
--- /dev/null
+++ b/tools/testing/selftests/zram/zram_lib.sh
@@ -0,0 +1,222 @@
+#!/bin/sh
+# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
+#
+# 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.
+#
+# Author: Alexey Kodanev <[email protected]>
+# Modified: Naresh Kamboju <[email protected]>
+
+MODULE=0
+dev_makeswap=-1
+dev_mounted=-1
+
+trap INT
+
+zram_cleanup()
+{
+ echo "zram cleanup"
+ local i=
+ for i in $(seq 0 $dev_makeswap); do
+ swapoff /dev/zram$i
+ done
+
+ for i in $(seq 0 $dev_mounted); do
+ umount /dev/zram$i
+ done
+
+ for i in $(seq 0 $(($dev_num - 1))); do
+ echo 1 > /sys/block/zram${i}/reset
+ rm -rf zram$i
+ done
+
+}
+
+zram_unload()
+{
+ if [ $MODULE -ne 0 ] ; then
+ echo "zram rmmod zram"
+ rmmod zram > /dev/null 2>&1
+ fi
+}
+
+zram_load()
+{
+ # check zram module exists
+ MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
+ if [ -f $MODULE_PATH ]; then
+ MODULE=1
+ echo "create '$dev_num' zram device(s)"
+ modprobe zram num_devices=$dev_num
+ if [ $? -ne 0 ]; then
+ echo "failed to insert zram module"
+ exit 1
+ fi
+
+ dev_num_created=$(ls /dev/zram* | wc -w)
+
+ if [ "$dev_num_created" -ne "$dev_num" ]; then
+ echo "unexpected num of devices: $dev_num_created"
+ ERR_CODE=-1
+ else
+ echo "zram load module successful"
+ fi
+ elif [ -b /dev/zram0 ]; then
+ echo "/dev/zram0 device file found: OK"
+ else
+ echo "ERROR: No zram.ko module or no /dev/zram0 device found"
+ echo "$TCID : CONFIG_ZRAM is not set"
+ exit 1
+ fi
+}
+
+zram_max_streams()
+{
+ echo "set max_comp_streams to zram device(s)"
+
+ local i=0
+ for max_s in $zram_max_streams; do
+ local sys_path="/sys/block/zram${i}/max_comp_streams"
+ echo $max_s > $sys_path || \
+ echo "FAIL failed to set '$max_s' to $sys_path"
+ sleep 1
+ local max_streams=$(cat $sys_path)
+
+ [ "$max_s" -ne "$max_streams" ] && \
+ echo "FAIL can't set max_streams '$max_s', get $max_stream"
+
+ i=$(($i + 1))
+ echo "$sys_path = '$max_streams' ($i/$dev_num)"
+ done
+
+ echo "zram max streams: OK"
+}
+
+zram_compress_alg()
+{
+ echo "test that we can set compression algorithm"
+
+ local algs=$(cat /sys/block/zram0/comp_algorithm)
+ echo "supported algs: $algs"
+ local i=0
+ for alg in $zram_algs; do
+ local sys_path="/sys/block/zram${i}/comp_algorithm"
+ echo "$alg" > $sys_path || \
+ echo "FAIL can't set '$alg' to $sys_path"
+ i=$(($i + 1))
+ echo "$sys_path = '$alg' ($i/$dev_num)"
+ done
+
+ echo "zram set compression algorithm: OK"
+}
+
+zram_set_disksizes()
+{
+ echo "set disk size to zram device(s)"
+ local i=0
+ for ds in $zram_sizes; do
+ local sys_path="/sys/block/zram${i}/disksize"
+ echo "$ds" > $sys_path || \
+ echo "FAIL can't set '$ds' to $sys_path"
+
+ i=$(($i + 1))
+ echo "$sys_path = '$ds' ($i/$dev_num)"
+ done
+
+ echo "zram set disksizes: OK"
+}
+
+zram_set_memlimit()
+{
+ echo "set memory limit to zram device(s)"
+
+ local i=0
+ for ds in $zram_mem_limits; do
+ local sys_path="/sys/block/zram${i}/mem_limit"
+ echo "$ds" > $sys_path || \
+ echo "FAIL can't set '$ds' to $sys_path"
+
+ i=$(($i + 1))
+ echo "$sys_path = '$ds' ($i/$dev_num)"
+ done
+
+ echo "zram set memory limit: OK"
+}
+
+zram_makeswap()
+{
+ echo "make swap with zram device(s)"
+ local i=0
+ for i in $(seq 0 $(($dev_num - 1))); do
+ mkswap /dev/zram$i > err.log 2>&1
+ if [ $? -ne 0 ]; then
+ cat err.log
+ echo "FAIL mkswap /dev/zram$1 failed"
+ fi
+
+ swapon /dev/zram$i > err.log 2>&1
+ if [ $? -ne 0 ]; then
+ cat err.log
+ echo "FAIL swapon /dev/zram$1 failed"
+ fi
+
+ echo "done with /dev/zram$i"
+ dev_makeswap=$i
+ done
+
+ echo "zram making zram mkswap and swapon: OK"
+}
+
+zram_swapoff()
+{
+ local i=
+ for i in $(seq 0 $dev_makeswap); do
+ swapoff /dev/zram$i > err.log 2>&1
+ if [ $? -ne 0 ]; then
+ cat err.log
+ echo "FAIL swapoff /dev/zram$i failed"
+ fi
+ done
+ dev_makeswap=-1
+
+ echo "zram swapoff: OK"
+}
+
+zram_makefs()
+{
+ local i=0
+ for fs in $zram_filesystems; do
+ # if requested fs not supported default it to ext2
+ which mkfs.$fs > /dev/null 2>&1 || fs=ext2
+
+ echo "make $fs filesystem on /dev/zram$i"
+ mkfs.$fs /dev/zram$i > err.log 2>&1
+ if [ $? -ne 0 ]; then
+ cat err.log
+ echo "FAIL failed to make $fs on /dev/zram$i"
+ fi
+ i=$(($i + 1))
+ echo "zram mkfs.$fs: OK"
+ done
+}
+
+zram_mount()
+{
+ local i=0
+ for i in $(seq 0 $(($dev_num - 1))); do
+ echo "mount /dev/zram$i"
+ mkdir zram$i
+ mount /dev/zram$i zram$i > /dev/null || \
+ echo "FAIL mount /dev/zram$i failed"
+ dev_mounted=$i
+ done
+
+ echo "zram mount of zram device(s): OK"
+}
--
1.9.1
On 08/17/2015 02:39 PM, [email protected] wrote:
> From: Naresh Kamboju <[email protected]>
Are you using git send-email to send this patch? Not sure why
I see this From and the one below.
>
> zram.sh: sanity check of CONFIG_ZRAM and run zram01.sh and zram02.sh
> zram01.sh: creates general purpose ram disks with different filesystems
> zram02.sh: creates block device for swap
> zram_lib.sh: create library with initialization/cleanup functions
> README: ZRAM introduction and Kconfig required.
> Makefile: To run zram tests
Could please write a proper commit message instead of list of files
and description.
>
> From: Alexey Kodanev <[email protected]>
Same comment here.
> CC: Shuah Khan <[email protected]>
> CC: Tyler Baker <[email protected]>
> CC: Milosz Wasilewski <[email protected]>
> Signed-off-by: Naresh Kamboju <[email protected]>
> Signed-off-by: Alexey Kodanev <[email protected]>
> ---
> tools/testing/selftests/Makefile | 1 +
> tools/testing/selftests/zram/Makefile | 12 ++
> tools/testing/selftests/zram/README | 40 ++++++
> tools/testing/selftests/zram/zram.sh | 22 +++
> tools/testing/selftests/zram/zram01.sh | 98 ++++++++++++++
> tools/testing/selftests/zram/zram02.sh | 53 ++++++++
> tools/testing/selftests/zram/zram_lib.sh | 222 +++++++++++++++++++++++++++++++
> 7 files changed, 448 insertions(+)
> create mode 100644 tools/testing/selftests/zram/Makefile
> create mode 100644 tools/testing/selftests/zram/README
> create mode 100755 tools/testing/selftests/zram/zram.sh
> create mode 100755 tools/testing/selftests/zram/zram01.sh
> create mode 100755 tools/testing/selftests/zram/zram02.sh
> create mode 100755 tools/testing/selftests/zram/zram_lib.sh
>
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index 24ae9e8..9763dd9 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -22,6 +22,7 @@ endif
> TARGETS += user
> TARGETS += vm
> TARGETS += x86
> +TARGETS += zram
> #Please keep the TARGETS list alphabetically sorted
> # Run "make quicktest=1 run_tests" or
> # "make quicktest=1 kselftest from top level Makefile
> diff --git a/tools/testing/selftests/zram/Makefile b/tools/testing/selftests/zram/Makefile
> new file mode 100644
> index 0000000..ec45513
> --- /dev/null
> +++ b/tools/testing/selftests/zram/Makefile
> @@ -0,0 +1,12 @@
> +all:
> +
> +TEST_PROGS := zram.sh
> +TEST_FILES := zram01.sh zram02.sh zram_lib.sh
> +
> +include ../lib.mk
> +
> +run_tests:
> + @/bin/bash ./zram.sh
> +
> +clean:
> + $(RM) err.log
> diff --git a/tools/testing/selftests/zram/README b/tools/testing/selftests/zram/README
> new file mode 100644
> index 0000000..eb17917
> --- /dev/null
> +++ b/tools/testing/selftests/zram/README
> @@ -0,0 +1,40 @@
> +zram: Compressed RAM based block devices
> +----------------------------------------
> +* Introduction
> +
> +The zram module creates RAM based block devices named /dev/zram<id>
> +(<id> = 0, 1, ...). Pages written to these disks are compressed and stored
> +in memory itself. These disks allow very fast I/O and compression provides
> +good amounts of memory savings. Some of the usecases include /tmp storage,
> +use as swap disks, various caches under /var and maybe many more :)
> +
> +Statistics for individual zram devices are exported through sysfs nodes at
> +/sys/block/zram<id>/
> +
> +Kconfig required:
> +CONFIG_ZRAM=y
> +CONFIG_ZRAM_LZ4_COMPRESS=y
> +CONFIG_ZPOOL=y
> +CONFIG_ZSMALLOC=y
> +
> +ZRAM Testcases
> +--------------
> +zram_lib.sh: create library with initialization/cleanup functions
> +zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02
> +
> +Two functional tests: zram01 and zram02:
> +zram01.sh: creates general purpose ram disks with ext4 filesystems
> +zram02.sh: creates block device for swap
> +
> +Commands required for testing:
> + - bc
> + - dd
> + - free
> + - awk
> + - mkswap
> + - swapon
> + - swapoff
> + - mkfs/ mkfs.ext4
> +
> +For more information please refer:
> +kernel-source-tree/Documentation/blockdev/zram.txt
> diff --git a/tools/testing/selftests/zram/zram.sh b/tools/testing/selftests/zram/zram.sh
> new file mode 100755
> index 0000000..be219fd
> --- /dev/null
> +++ b/tools/testing/selftests/zram/zram.sh
> @@ -0,0 +1,22 @@
> +#!/bin/bash
> +TCID="zram.sh"
> +
> +run_zram () {
> +echo "--------------------"
> +echo "running zram tests"
> +echo "--------------------"
> +./zram01.sh
> +./zram02.sh
> +}
> +
> +# check zram module exists
> +MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
> +if [ -f $MODULE_PATH ]; then
> + run_zram
> +elif [ -b /dev/zram0 ]; then
> + run_zram
> +else
> + echo "$TCID : No zram.ko module or /dev/zram0 device file not found"
> + echo "$TCID : CONFIG_ZRAM is not set"
> + exit 1
> +fi
> diff --git a/tools/testing/selftests/zram/zram01.sh b/tools/testing/selftests/zram/zram01.sh
> new file mode 100755
> index 0000000..2a2475d
> --- /dev/null
> +++ b/tools/testing/selftests/zram/zram01.sh
> @@ -0,0 +1,98 @@
> +#!/bin/bash
> +# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
> +#
> +# 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.
> +#
> +# Test creates several zram devices with different filesystems on them.
> +# It fills each device with zeros and checks that compression works.
> +#
> +# Author: Alexey Kodanev <[email protected]>
> +# Modified: Naresh Kamboju <[email protected]>
> +
> +TCID="zram01"
> +ERR_CODE=0
> +
> +. ./zram_lib.sh
> +
> +# Test will create the following number of zram devices:
> +dev_num=1
> +# This is a list of parameters for zram devices.
> +# Number of items must be equal to 'dev_num' parameter.
> +zram_max_streams="2"
> +
> +# 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="2097152" # 2MB
> +zram_mem_limits="2M"
> +zram_filesystems="ext4"
> +zram_algs="lzo"
> +
> +zram_fill_fs()
> +{
> + local mem_free0=$(free -m | awk 'NR==2 {print $4}')
> +
> + for i in $(seq 0 $(($dev_num - 1))); do
> + echo "fill zram$i..."
> + local b=0
> + while [ true ]; do
> + dd conv=notrunc if=/dev/zero of=zram${i}/file \
> + oflag=append count=1 bs=1024 status=none \
> + > /dev/null 2>&1 || break
> + b=$(($b + 1))
> + done
> + echo "zram$i can be filled with '$b' KB"
> + done
> +
> + local mem_free1=$(free -m | awk 'NR==2 {print $4}')
> + local used_mem=$(($mem_free0 - $mem_free1))
> +
> + local total_size=0
> + for sm in $zram_sizes; do
> + local s=$(echo $sm | sed 's/M//')
> + total_size=$(($total_size + $s))
> + done
> +
> + echo "zram used ${used_mem}M, zram disk sizes ${total_size}M"
> +
> + local v=$((100 * $total_size / $used_mem))
> +
> + if [ "$v" -lt 100 ]; then
> + echo "FAIL compression ratio: 0.$v:1"
> + ERR_CODE=-1
> + zram_cleanup
> + return
> + fi
> +
> + echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
> +}
> +
> +zram_load
> +zram_max_streams
> +zram_compress_alg
> +zram_set_disksizes
> +zram_set_memlimit
> +zram_makefs
> +zram_mount
> +
> +zram_fill_fs
> +zram_cleanup
> +zram_unload
> +
> +if [ $ERR_CODE -ne 0 ]; then
> + echo "$TCID : [FAIL]"
> +else
> + echo "$TCID : [PASS]"
> +fi
> diff --git a/tools/testing/selftests/zram/zram02.sh b/tools/testing/selftests/zram/zram02.sh
> new file mode 100755
> index 0000000..96e82dc
> --- /dev/null
> +++ b/tools/testing/selftests/zram/zram02.sh
> @@ -0,0 +1,53 @@
> +#!/bin/bash
> +# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
> +#
> +# 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.
> +#
> +# Test checks that we can create swap zram device.
> +#
> +# Author: Alexey Kodanev <[email protected]>
> +# Modified: Naresh Kamboju <[email protected]>
> +
> +TCID="zram02"
> +ERR_CODE=0
> +
> +. ./zram_lib.sh
> +
> +# Test will create the following number of zram devices:
> +dev_num=1
> +# This is a list of parameters for zram devices.
> +# Number of items must be equal to 'dev_num' parameter.
> +zram_max_streams="2"
> +
> +# 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="1048576" # 1M
> +zram_mem_limits="1M"
> +
> +zram_load
> +zram_max_streams
> +zram_set_disksizes
> +zram_set_memlimit
> +zram_makeswap
> +zram_swapoff
> +zram_cleanup
> +zram_unload
> +
> +if [ $ERR_CODE -ne 0 ]; then
> + echo "$TCID : [FAIL]"
> +else
> + echo "$TCID : [PASS]"
> +fi
> diff --git a/tools/testing/selftests/zram/zram_lib.sh b/tools/testing/selftests/zram/zram_lib.sh
> new file mode 100755
> index 0000000..3b6abf1
> --- /dev/null
> +++ b/tools/testing/selftests/zram/zram_lib.sh
> @@ -0,0 +1,222 @@
> +#!/bin/sh
> +# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
> +#
> +# 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.
> +#
> +# Author: Alexey Kodanev <[email protected]>
> +# Modified: Naresh Kamboju <[email protected]>
> +
> +MODULE=0
> +dev_makeswap=-1
> +dev_mounted=-1
> +
> +trap INT
> +
> +zram_cleanup()
> +{
> + echo "zram cleanup"
> + local i=
> + for i in $(seq 0 $dev_makeswap); do
> + swapoff /dev/zram$i
> + done
> +
> + for i in $(seq 0 $dev_mounted); do
> + umount /dev/zram$i
> + done
> +
> + for i in $(seq 0 $(($dev_num - 1))); do
> + echo 1 > /sys/block/zram${i}/reset
> + rm -rf zram$i
> + done
> +
> +}
> +
> +zram_unload()
> +{
> + if [ $MODULE -ne 0 ] ; then
> + echo "zram rmmod zram"
> + rmmod zram > /dev/null 2>&1
> + fi
> +}
> +
> +zram_load()
> +{
> + # check zram module exists
> + MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
> + if [ -f $MODULE_PATH ]; then
> + MODULE=1
> + echo "create '$dev_num' zram device(s)"
> + modprobe zram num_devices=$dev_num
> + if [ $? -ne 0 ]; then
> + echo "failed to insert zram module"
> + exit 1
> + fi
> +
> + dev_num_created=$(ls /dev/zram* | wc -w)
> +
> + if [ "$dev_num_created" -ne "$dev_num" ]; then
> + echo "unexpected num of devices: $dev_num_created"
> + ERR_CODE=-1
> + else
> + echo "zram load module successful"
> + fi
> + elif [ -b /dev/zram0 ]; then
> + echo "/dev/zram0 device file found: OK"
> + else
> + echo "ERROR: No zram.ko module or no /dev/zram0 device found"
> + echo "$TCID : CONFIG_ZRAM is not set"
> + exit 1
> + fi
> +}
> +
> +zram_max_streams()
> +{
> + echo "set max_comp_streams to zram device(s)"
> +
> + local i=0
> + for max_s in $zram_max_streams; do
> + local sys_path="/sys/block/zram${i}/max_comp_streams"
> + echo $max_s > $sys_path || \
> + echo "FAIL failed to set '$max_s' to $sys_path"
> + sleep 1
> + local max_streams=$(cat $sys_path)
> +
> + [ "$max_s" -ne "$max_streams" ] && \
> + echo "FAIL can't set max_streams '$max_s', get $max_stream"
> +
> + i=$(($i + 1))
> + echo "$sys_path = '$max_streams' ($i/$dev_num)"
> + done
> +
> + echo "zram max streams: OK"
> +}
> +
> +zram_compress_alg()
> +{
> + echo "test that we can set compression algorithm"
> +
> + local algs=$(cat /sys/block/zram0/comp_algorithm)
> + echo "supported algs: $algs"
> + local i=0
> + for alg in $zram_algs; do
> + local sys_path="/sys/block/zram${i}/comp_algorithm"
> + echo "$alg" > $sys_path || \
> + echo "FAIL can't set '$alg' to $sys_path"
> + i=$(($i + 1))
> + echo "$sys_path = '$alg' ($i/$dev_num)"
> + done
> +
> + echo "zram set compression algorithm: OK"
> +}
> +
> +zram_set_disksizes()
> +{
> + echo "set disk size to zram device(s)"
> + local i=0
> + for ds in $zram_sizes; do
> + local sys_path="/sys/block/zram${i}/disksize"
> + echo "$ds" > $sys_path || \
> + echo "FAIL can't set '$ds' to $sys_path"
> +
> + i=$(($i + 1))
> + echo "$sys_path = '$ds' ($i/$dev_num)"
> + done
> +
> + echo "zram set disksizes: OK"
> +}
> +
> +zram_set_memlimit()
> +{
> + echo "set memory limit to zram device(s)"
> +
> + local i=0
> + for ds in $zram_mem_limits; do
> + local sys_path="/sys/block/zram${i}/mem_limit"
> + echo "$ds" > $sys_path || \
> + echo "FAIL can't set '$ds' to $sys_path"
> +
> + i=$(($i + 1))
> + echo "$sys_path = '$ds' ($i/$dev_num)"
> + done
> +
> + echo "zram set memory limit: OK"
> +}
> +
> +zram_makeswap()
> +{
> + echo "make swap with zram device(s)"
> + local i=0
> + for i in $(seq 0 $(($dev_num - 1))); do
> + mkswap /dev/zram$i > err.log 2>&1
> + if [ $? -ne 0 ]; then
> + cat err.log
> + echo "FAIL mkswap /dev/zram$1 failed"
> + fi
> +
> + swapon /dev/zram$i > err.log 2>&1
> + if [ $? -ne 0 ]; then
> + cat err.log
> + echo "FAIL swapon /dev/zram$1 failed"
> + fi
> +
> + echo "done with /dev/zram$i"
> + dev_makeswap=$i
> + done
> +
> + echo "zram making zram mkswap and swapon: OK"
> +}
> +
> +zram_swapoff()
> +{
> + local i=
> + for i in $(seq 0 $dev_makeswap); do
> + swapoff /dev/zram$i > err.log 2>&1
> + if [ $? -ne 0 ]; then
> + cat err.log
> + echo "FAIL swapoff /dev/zram$i failed"
> + fi
> + done
> + dev_makeswap=-1
> +
> + echo "zram swapoff: OK"
> +}
> +
> +zram_makefs()
> +{
> + local i=0
> + for fs in $zram_filesystems; do
> + # if requested fs not supported default it to ext2
> + which mkfs.$fs > /dev/null 2>&1 || fs=ext2
> +
> + echo "make $fs filesystem on /dev/zram$i"
> + mkfs.$fs /dev/zram$i > err.log 2>&1
> + if [ $? -ne 0 ]; then
> + cat err.log
> + echo "FAIL failed to make $fs on /dev/zram$i"
> + fi
> + i=$(($i + 1))
> + echo "zram mkfs.$fs: OK"
> + done
> +}
> +
> +zram_mount()
> +{
> + local i=0
> + for i in $(seq 0 $(($dev_num - 1))); do
> + echo "mount /dev/zram$i"
> + mkdir zram$i
> + mount /dev/zram$i zram$i > /dev/null || \
> + echo "FAIL mount /dev/zram$i failed"
> + dev_mounted=$i
> + done
> +
> + echo "zram mount of zram device(s): OK"
> +}
>
--
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America (Silicon Valley)
[email protected] | (970) 217-8978
Hi Shuah Khan,
On 18 August 2015 at 03:14, Shuah Khan <[email protected]> wrote:
> On 08/17/2015 02:39 PM, [email protected] wrote:
>> From: Naresh Kamboju <[email protected]>
>
> Are you using git send-email to send this patch? Not sure why
> I see this From and the one below.
I do use git send-email to send this patch.
From: Naresh is generated from git send-patch.
>
>>
>> zram.sh: sanity check of CONFIG_ZRAM and run zram01.sh and zram02.sh
>> zram01.sh: creates general purpose ram disks with different filesystems
>> zram02.sh: creates block device for swap
>> zram_lib.sh: create library with initialization/cleanup functions
>> README: ZRAM introduction and Kconfig required.
>> Makefile: To run zram tests
>
> Could please write a proper commit message instead of list of files
> and description.
Done and sent v3 patch.
>
>>
>> From: Alexey Kodanev <[email protected]>
>
> Same comment here.
The original author of this patch is "Alexey Kodanev". who submitted
patch on LTP.
I have updated and modified to fit into selftests.
That is the reason for adding From: Alexey Kodanev again in commit message.
However, I have added him in CC for v3 patch set.
Best regards
Naresh Kamboju
>
>> CC: Shuah Khan <[email protected]>
>> CC: Tyler Baker <[email protected]>
>> CC: Milosz Wasilewski <[email protected]>
>> Signed-off-by: Naresh Kamboju <[email protected]>
>> Signed-off-by: Alexey Kodanev <[email protected]>
>> ---
>> tools/testing/selftests/Makefile | 1 +
>> tools/testing/selftests/zram/Makefile | 12 ++
>> tools/testing/selftests/zram/README | 40 ++++++
>> tools/testing/selftests/zram/zram.sh | 22 +++
>> tools/testing/selftests/zram/zram01.sh | 98 ++++++++++++++
>> tools/testing/selftests/zram/zram02.sh | 53 ++++++++
>> tools/testing/selftests/zram/zram_lib.sh | 222 +++++++++++++++++++++++++++++++
>> 7 files changed, 448 insertions(+)
>> create mode 100644 tools/testing/selftests/zram/Makefile
>> create mode 100644 tools/testing/selftests/zram/README
>> create mode 100755 tools/testing/selftests/zram/zram.sh
>> create mode 100755 tools/testing/selftests/zram/zram01.sh
>> create mode 100755 tools/testing/selftests/zram/zram02.sh
>> create mode 100755 tools/testing/selftests/zram/zram_lib.sh
>>
>> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
>> index 24ae9e8..9763dd9 100644
>> --- a/tools/testing/selftests/Makefile
>> +++ b/tools/testing/selftests/Makefile
>> @@ -22,6 +22,7 @@ endif
>> TARGETS += user
>> TARGETS += vm
>> TARGETS += x86
>> +TARGETS += zram
>> #Please keep the TARGETS list alphabetically sorted
>> # Run "make quicktest=1 run_tests" or
>> # "make quicktest=1 kselftest from top level Makefile
>> diff --git a/tools/testing/selftests/zram/Makefile b/tools/testing/selftests/zram/Makefile
>> new file mode 100644
>> index 0000000..ec45513
>> --- /dev/null
>> +++ b/tools/testing/selftests/zram/Makefile
>> @@ -0,0 +1,12 @@
>> +all:
>> +
>> +TEST_PROGS := zram.sh
>> +TEST_FILES := zram01.sh zram02.sh zram_lib.sh
>> +
>> +include ../lib.mk
>> +
>> +run_tests:
>> + @/bin/bash ./zram.sh
>> +
>> +clean:
>> + $(RM) err.log
>> diff --git a/tools/testing/selftests/zram/README b/tools/testing/selftests/zram/README
>> new file mode 100644
>> index 0000000..eb17917
>> --- /dev/null
>> +++ b/tools/testing/selftests/zram/README
>> @@ -0,0 +1,40 @@
>> +zram: Compressed RAM based block devices
>> +----------------------------------------
>> +* Introduction
>> +
>> +The zram module creates RAM based block devices named /dev/zram<id>
>> +(<id> = 0, 1, ...). Pages written to these disks are compressed and stored
>> +in memory itself. These disks allow very fast I/O and compression provides
>> +good amounts of memory savings. Some of the usecases include /tmp storage,
>> +use as swap disks, various caches under /var and maybe many more :)
>> +
>> +Statistics for individual zram devices are exported through sysfs nodes at
>> +/sys/block/zram<id>/
>> +
>> +Kconfig required:
>> +CONFIG_ZRAM=y
>> +CONFIG_ZRAM_LZ4_COMPRESS=y
>> +CONFIG_ZPOOL=y
>> +CONFIG_ZSMALLOC=y
>> +
>> +ZRAM Testcases
>> +--------------
>> +zram_lib.sh: create library with initialization/cleanup functions
>> +zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02
>> +
>> +Two functional tests: zram01 and zram02:
>> +zram01.sh: creates general purpose ram disks with ext4 filesystems
>> +zram02.sh: creates block device for swap
>> +
>> +Commands required for testing:
>> + - bc
>> + - dd
>> + - free
>> + - awk
>> + - mkswap
>> + - swapon
>> + - swapoff
>> + - mkfs/ mkfs.ext4
>> +
>> +For more information please refer:
>> +kernel-source-tree/Documentation/blockdev/zram.txt
>> diff --git a/tools/testing/selftests/zram/zram.sh b/tools/testing/selftests/zram/zram.sh
>> new file mode 100755
>> index 0000000..be219fd
>> --- /dev/null
>> +++ b/tools/testing/selftests/zram/zram.sh
>> @@ -0,0 +1,22 @@
>> +#!/bin/bash
>> +TCID="zram.sh"
>> +
>> +run_zram () {
>> +echo "--------------------"
>> +echo "running zram tests"
>> +echo "--------------------"
>> +./zram01.sh
>> +./zram02.sh
>> +}
>> +
>> +# check zram module exists
>> +MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
>> +if [ -f $MODULE_PATH ]; then
>> + run_zram
>> +elif [ -b /dev/zram0 ]; then
>> + run_zram
>> +else
>> + echo "$TCID : No zram.ko module or /dev/zram0 device file not found"
>> + echo "$TCID : CONFIG_ZRAM is not set"
>> + exit 1
>> +fi
>> diff --git a/tools/testing/selftests/zram/zram01.sh b/tools/testing/selftests/zram/zram01.sh
>> new file mode 100755
>> index 0000000..2a2475d
>> --- /dev/null
>> +++ b/tools/testing/selftests/zram/zram01.sh
>> @@ -0,0 +1,98 @@
>> +#!/bin/bash
>> +# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
>> +#
>> +# 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.
>> +#
>> +# Test creates several zram devices with different filesystems on them.
>> +# It fills each device with zeros and checks that compression works.
>> +#
>> +# Author: Alexey Kodanev <[email protected]>
>> +# Modified: Naresh Kamboju <[email protected]>
>> +
>> +TCID="zram01"
>> +ERR_CODE=0
>> +
>> +. ./zram_lib.sh
>> +
>> +# Test will create the following number of zram devices:
>> +dev_num=1
>> +# This is a list of parameters for zram devices.
>> +# Number of items must be equal to 'dev_num' parameter.
>> +zram_max_streams="2"
>> +
>> +# 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="2097152" # 2MB
>> +zram_mem_limits="2M"
>> +zram_filesystems="ext4"
>> +zram_algs="lzo"
>> +
>> +zram_fill_fs()
>> +{
>> + local mem_free0=$(free -m | awk 'NR==2 {print $4}')
>> +
>> + for i in $(seq 0 $(($dev_num - 1))); do
>> + echo "fill zram$i..."
>> + local b=0
>> + while [ true ]; do
>> + dd conv=notrunc if=/dev/zero of=zram${i}/file \
>> + oflag=append count=1 bs=1024 status=none \
>> + > /dev/null 2>&1 || break
>> + b=$(($b + 1))
>> + done
>> + echo "zram$i can be filled with '$b' KB"
>> + done
>> +
>> + local mem_free1=$(free -m | awk 'NR==2 {print $4}')
>> + local used_mem=$(($mem_free0 - $mem_free1))
>> +
>> + local total_size=0
>> + for sm in $zram_sizes; do
>> + local s=$(echo $sm | sed 's/M//')
>> + total_size=$(($total_size + $s))
>> + done
>> +
>> + echo "zram used ${used_mem}M, zram disk sizes ${total_size}M"
>> +
>> + local v=$((100 * $total_size / $used_mem))
>> +
>> + if [ "$v" -lt 100 ]; then
>> + echo "FAIL compression ratio: 0.$v:1"
>> + ERR_CODE=-1
>> + zram_cleanup
>> + return
>> + fi
>> +
>> + echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
>> +}
>> +
>> +zram_load
>> +zram_max_streams
>> +zram_compress_alg
>> +zram_set_disksizes
>> +zram_set_memlimit
>> +zram_makefs
>> +zram_mount
>> +
>> +zram_fill_fs
>> +zram_cleanup
>> +zram_unload
>> +
>> +if [ $ERR_CODE -ne 0 ]; then
>> + echo "$TCID : [FAIL]"
>> +else
>> + echo "$TCID : [PASS]"
>> +fi
>> diff --git a/tools/testing/selftests/zram/zram02.sh b/tools/testing/selftests/zram/zram02.sh
>> new file mode 100755
>> index 0000000..96e82dc
>> --- /dev/null
>> +++ b/tools/testing/selftests/zram/zram02.sh
>> @@ -0,0 +1,53 @@
>> +#!/bin/bash
>> +# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
>> +#
>> +# 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.
>> +#
>> +# Test checks that we can create swap zram device.
>> +#
>> +# Author: Alexey Kodanev <[email protected]>
>> +# Modified: Naresh Kamboju <[email protected]>
>> +
>> +TCID="zram02"
>> +ERR_CODE=0
>> +
>> +. ./zram_lib.sh
>> +
>> +# Test will create the following number of zram devices:
>> +dev_num=1
>> +# This is a list of parameters for zram devices.
>> +# Number of items must be equal to 'dev_num' parameter.
>> +zram_max_streams="2"
>> +
>> +# 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="1048576" # 1M
>> +zram_mem_limits="1M"
>> +
>> +zram_load
>> +zram_max_streams
>> +zram_set_disksizes
>> +zram_set_memlimit
>> +zram_makeswap
>> +zram_swapoff
>> +zram_cleanup
>> +zram_unload
>> +
>> +if [ $ERR_CODE -ne 0 ]; then
>> + echo "$TCID : [FAIL]"
>> +else
>> + echo "$TCID : [PASS]"
>> +fi
>> diff --git a/tools/testing/selftests/zram/zram_lib.sh b/tools/testing/selftests/zram/zram_lib.sh
>> new file mode 100755
>> index 0000000..3b6abf1
>> --- /dev/null
>> +++ b/tools/testing/selftests/zram/zram_lib.sh
>> @@ -0,0 +1,222 @@
>> +#!/bin/sh
>> +# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
>> +#
>> +# 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.
>> +#
>> +# Author: Alexey Kodanev <[email protected]>
>> +# Modified: Naresh Kamboju <[email protected]>
>> +
>> +MODULE=0
>> +dev_makeswap=-1
>> +dev_mounted=-1
>> +
>> +trap INT
>> +
>> +zram_cleanup()
>> +{
>> + echo "zram cleanup"
>> + local i=
>> + for i in $(seq 0 $dev_makeswap); do
>> + swapoff /dev/zram$i
>> + done
>> +
>> + for i in $(seq 0 $dev_mounted); do
>> + umount /dev/zram$i
>> + done
>> +
>> + for i in $(seq 0 $(($dev_num - 1))); do
>> + echo 1 > /sys/block/zram${i}/reset
>> + rm -rf zram$i
>> + done
>> +
>> +}
>> +
>> +zram_unload()
>> +{
>> + if [ $MODULE -ne 0 ] ; then
>> + echo "zram rmmod zram"
>> + rmmod zram > /dev/null 2>&1
>> + fi
>> +}
>> +
>> +zram_load()
>> +{
>> + # check zram module exists
>> + MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
>> + if [ -f $MODULE_PATH ]; then
>> + MODULE=1
>> + echo "create '$dev_num' zram device(s)"
>> + modprobe zram num_devices=$dev_num
>> + if [ $? -ne 0 ]; then
>> + echo "failed to insert zram module"
>> + exit 1
>> + fi
>> +
>> + dev_num_created=$(ls /dev/zram* | wc -w)
>> +
>> + if [ "$dev_num_created" -ne "$dev_num" ]; then
>> + echo "unexpected num of devices: $dev_num_created"
>> + ERR_CODE=-1
>> + else
>> + echo "zram load module successful"
>> + fi
>> + elif [ -b /dev/zram0 ]; then
>> + echo "/dev/zram0 device file found: OK"
>> + else
>> + echo "ERROR: No zram.ko module or no /dev/zram0 device found"
>> + echo "$TCID : CONFIG_ZRAM is not set"
>> + exit 1
>> + fi
>> +}
>> +
>> +zram_max_streams()
>> +{
>> + echo "set max_comp_streams to zram device(s)"
>> +
>> + local i=0
>> + for max_s in $zram_max_streams; do
>> + local sys_path="/sys/block/zram${i}/max_comp_streams"
>> + echo $max_s > $sys_path || \
>> + echo "FAIL failed to set '$max_s' to $sys_path"
>> + sleep 1
>> + local max_streams=$(cat $sys_path)
>> +
>> + [ "$max_s" -ne "$max_streams" ] && \
>> + echo "FAIL can't set max_streams '$max_s', get $max_stream"
>> +
>> + i=$(($i + 1))
>> + echo "$sys_path = '$max_streams' ($i/$dev_num)"
>> + done
>> +
>> + echo "zram max streams: OK"
>> +}
>> +
>> +zram_compress_alg()
>> +{
>> + echo "test that we can set compression algorithm"
>> +
>> + local algs=$(cat /sys/block/zram0/comp_algorithm)
>> + echo "supported algs: $algs"
>> + local i=0
>> + for alg in $zram_algs; do
>> + local sys_path="/sys/block/zram${i}/comp_algorithm"
>> + echo "$alg" > $sys_path || \
>> + echo "FAIL can't set '$alg' to $sys_path"
>> + i=$(($i + 1))
>> + echo "$sys_path = '$alg' ($i/$dev_num)"
>> + done
>> +
>> + echo "zram set compression algorithm: OK"
>> +}
>> +
>> +zram_set_disksizes()
>> +{
>> + echo "set disk size to zram device(s)"
>> + local i=0
>> + for ds in $zram_sizes; do
>> + local sys_path="/sys/block/zram${i}/disksize"
>> + echo "$ds" > $sys_path || \
>> + echo "FAIL can't set '$ds' to $sys_path"
>> +
>> + i=$(($i + 1))
>> + echo "$sys_path = '$ds' ($i/$dev_num)"
>> + done
>> +
>> + echo "zram set disksizes: OK"
>> +}
>> +
>> +zram_set_memlimit()
>> +{
>> + echo "set memory limit to zram device(s)"
>> +
>> + local i=0
>> + for ds in $zram_mem_limits; do
>> + local sys_path="/sys/block/zram${i}/mem_limit"
>> + echo "$ds" > $sys_path || \
>> + echo "FAIL can't set '$ds' to $sys_path"
>> +
>> + i=$(($i + 1))
>> + echo "$sys_path = '$ds' ($i/$dev_num)"
>> + done
>> +
>> + echo "zram set memory limit: OK"
>> +}
>> +
>> +zram_makeswap()
>> +{
>> + echo "make swap with zram device(s)"
>> + local i=0
>> + for i in $(seq 0 $(($dev_num - 1))); do
>> + mkswap /dev/zram$i > err.log 2>&1
>> + if [ $? -ne 0 ]; then
>> + cat err.log
>> + echo "FAIL mkswap /dev/zram$1 failed"
>> + fi
>> +
>> + swapon /dev/zram$i > err.log 2>&1
>> + if [ $? -ne 0 ]; then
>> + cat err.log
>> + echo "FAIL swapon /dev/zram$1 failed"
>> + fi
>> +
>> + echo "done with /dev/zram$i"
>> + dev_makeswap=$i
>> + done
>> +
>> + echo "zram making zram mkswap and swapon: OK"
>> +}
>> +
>> +zram_swapoff()
>> +{
>> + local i=
>> + for i in $(seq 0 $dev_makeswap); do
>> + swapoff /dev/zram$i > err.log 2>&1
>> + if [ $? -ne 0 ]; then
>> + cat err.log
>> + echo "FAIL swapoff /dev/zram$i failed"
>> + fi
>> + done
>> + dev_makeswap=-1
>> +
>> + echo "zram swapoff: OK"
>> +}
>> +
>> +zram_makefs()
>> +{
>> + local i=0
>> + for fs in $zram_filesystems; do
>> + # if requested fs not supported default it to ext2
>> + which mkfs.$fs > /dev/null 2>&1 || fs=ext2
>> +
>> + echo "make $fs filesystem on /dev/zram$i"
>> + mkfs.$fs /dev/zram$i > err.log 2>&1
>> + if [ $? -ne 0 ]; then
>> + cat err.log
>> + echo "FAIL failed to make $fs on /dev/zram$i"
>> + fi
>> + i=$(($i + 1))
>> + echo "zram mkfs.$fs: OK"
>> + done
>> +}
>> +
>> +zram_mount()
>> +{
>> + local i=0
>> + for i in $(seq 0 $(($dev_num - 1))); do
>> + echo "mount /dev/zram$i"
>> + mkdir zram$i
>> + mount /dev/zram$i zram$i > /dev/null || \
>> + echo "FAIL mount /dev/zram$i failed"
>> + dev_mounted=$i
>> + done
>> +
>> + echo "zram mount of zram device(s): OK"
>> +}
>>
>
>
> --
> Shuah Khan
> Sr. Linux Kernel Developer
> Open Source Innovation Group
> Samsung Research America (Silicon Valley)
> [email protected] | (970) 217-8978