liux-kselftest-4.3-rc1:
This update adds new zram test and fixes to problems found
during testing this new zram test. In addition, there are
a few bug fixes and ksefltest improvement patches from Linaro
developers.
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Merge tag 'linux-kselftest-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kselftest update from Shuah Khan:
"This update adds new zram test and fixes to problems found during
testing this new zram test. In addition, there are a few bug fixes
and ksefltest improvement patches from Linaro developers.
I will send another update later on this week to fix kselftest
breakage due to commit 2bf9e0ab08 ("locking/static_keys: Provide a
selftest") after the fix soaks in next for a couple of days"
* tag 'linux-kselftest-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests/zram: Makefile fix
selftests/zram: must be run as root
selftests: breakpoints: fix installing error on the architecture except x86
selftests: check before install
selftests/zram: Adding zram tests
This commit is contained in:
Linus Torvalds
Коммит
54283aed90
|
|
@ -23,6 +23,7 @@ TARGETS += user
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|||
TARGETS += jumplabel
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TARGETS += vm
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TARGETS += x86
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TARGETS += zram
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#Please keep the TARGETS list alphabetically sorted
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# Run "make quicktest=1 run_tests" or
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# "make quicktest=1 kselftest from top level Makefile
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@ -72,7 +73,6 @@ ifdef INSTALL_PATH
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@# Ask all targets to install their files
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mkdir -p $(INSTALL_PATH)
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for TARGET in $(TARGETS); do \
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mkdir -p $(INSTALL_PATH)/$$TARGET ; \
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make -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
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done;
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|
|
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|||
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@ -1,22 +1,12 @@
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# Taken from perf makefile
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uname_M := $(shell uname -m 2>/dev/null || echo not)
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ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/)
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ifeq ($(ARCH),i386)
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ARCH := x86
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endif
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ifeq ($(ARCH),x86_64)
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ARCH := x86
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endif
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ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
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ifeq ($(ARCH),x86)
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TEST_PROGS := breakpoint_test
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endif
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all:
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ifeq ($(ARCH),x86)
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gcc breakpoint_test.c -o breakpoint_test
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else
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echo "Not an x86 target, can't build breakpoints selftests"
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endif
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TEST_PROGS := breakpoint_test
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include ../lib.mk
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|
|
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@ -12,11 +12,14 @@ run_tests: all
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$(RUN_TESTS)
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define INSTALL_RULE
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mkdir -p $(INSTALL_PATH)
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@for TEST_DIR in $(TEST_DIRS); do\
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cp -r $$TEST_DIR $(INSTALL_PATH); \
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done;
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install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)
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@if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)" != "X" ]; then \
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mkdir -p $(INSTALL_PATH); \
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for TEST_DIR in $(TEST_DIRS); do \
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cp -r $$TEST_DIR $(INSTALL_PATH); \
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done; \
|
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echo "install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)"; \
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install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES); \
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fi
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endef
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install: all
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|
|
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|
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@ -0,0 +1,9 @@
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all:
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TEST_PROGS := zram.sh
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TEST_FILES := zram01.sh zram02.sh zram_lib.sh
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include ../lib.mk
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clean:
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$(RM) err.log
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@ -0,0 +1,40 @@
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zram: Compressed RAM based block devices
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----------------------------------------
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* Introduction
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The zram module creates RAM based block devices named /dev/zram<id>
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(<id> = 0, 1, ...). Pages written to these disks are compressed and stored
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in memory itself. These disks allow very fast I/O and compression provides
|
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good amounts of memory savings. Some of the usecases include /tmp storage,
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use as swap disks, various caches under /var and maybe many more :)
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|
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Statistics for individual zram devices are exported through sysfs nodes at
|
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/sys/block/zram<id>/
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|
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Kconfig required:
|
||||
CONFIG_ZRAM=y
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CONFIG_ZRAM_LZ4_COMPRESS=y
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CONFIG_ZPOOL=y
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CONFIG_ZSMALLOC=y
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|
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ZRAM Testcases
|
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--------------
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zram_lib.sh: create library with initialization/cleanup functions
|
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zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02
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|
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Two functional tests: zram01 and zram02:
|
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zram01.sh: creates general purpose ram disks with ext4 filesystems
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zram02.sh: creates block device for swap
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|
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Commands required for testing:
|
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- bc
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- dd
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- free
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- awk
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- mkswap
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- swapon
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- swapoff
|
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- mkfs/ mkfs.ext4
|
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|
||||
For more information please refer:
|
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kernel-source-tree/Documentation/blockdev/zram.txt
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|
|
@ -0,0 +1,35 @@
|
|||
#!/bin/bash
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TCID="zram.sh"
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|
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check_prereqs()
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{
|
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local msg="skip all tests:"
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|
||||
if [ $UID != 0 ]; then
|
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echo $msg must be run as root >&2
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exit 0
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fi
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}
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||||
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run_zram () {
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echo "--------------------"
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echo "running zram tests"
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echo "--------------------"
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./zram01.sh
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echo ""
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./zram02.sh
|
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}
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|
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check_prereqs
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# check zram module exists
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MODULE_PATH=/lib/modules/`uname -r`/kernel/drivers/block/zram/zram.ko
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if [ -f $MODULE_PATH ]; then
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run_zram
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elif [ -b /dev/zram0 ]; then
|
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run_zram
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else
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echo "$TCID : No zram.ko module or /dev/zram0 device file not found"
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echo "$TCID : CONFIG_ZRAM is not set"
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exit 1
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fi
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|
|
@ -0,0 +1,99 @@
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|||
#!/bin/bash
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# Copyright (c) 2015 Oracle and/or its affiliates. All Rights Reserved.
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#
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# 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.
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||||
# It fills each device with zeros and checks that compression works.
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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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|
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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"
|
||||
|
||||
# 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
|
||||
# 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.
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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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||||
|
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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))
|
||||
done
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||||
echo "zram$i can be filled with '$b' KB"
|
||||
done
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|
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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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|
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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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||||
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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
|
||||
echo "FAIL compression ratio: 0.$v:1"
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||||
ERR_CODE=-1
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||||
zram_cleanup
|
||||
return
|
||||
fi
|
||||
|
||||
echo "zram compression ratio: $(echo "scale=2; $v / 100 " | bc):1: OK"
|
||||
}
|
||||
|
||||
check_prereqs
|
||||
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
|
||||
|
|
@ -0,0 +1,54 @@
|
|||
#!/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 <alexey.kodanev@oracle.com>
|
||||
# Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
|
||||
|
||||
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"
|
||||
|
||||
check_prereqs
|
||||
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
|
||||
|
|
@ -0,0 +1,232 @@
|
|||
#!/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 <alexey.kodanev@oracle.com>
|
||||
# Modified: Naresh Kamboju <naresh.kamboju@linaro.org>
|
||||
|
||||
MODULE=0
|
||||
dev_makeswap=-1
|
||||
dev_mounted=-1
|
||||
|
||||
trap INT
|
||||
|
||||
check_prereqs()
|
||||
{
|
||||
local msg="skip all tests:"
|
||||
|
||||
if [ $UID != 0 ]; then
|
||||
echo $msg must be run as root >&2
|
||||
exit 0
|
||||
fi
|
||||
}
|
||||
|
||||
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"
|
||||
}
|
||||
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