The patch titled
Subject: fault-injection: add selftests for cpu and memory hotplug
has been added to the -mm tree. Its filename is
fault-injection-add-selftests-for-cpu-and-memory-hotplug.patch
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------------------------------------------------------
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Subject: fault-injection: add selftests for cpu and memory hotplug
This adds two selftests
* tools/testing/selftests/cpu-hotplug/on-off-test.sh is testing script
for CPU hotplug
1. Online all hot-pluggable CPUs
2. Offline all hot-pluggable CPUs
3. Online all hot-pluggable CPUs again
4. Exit if cpu-notifier-error-inject.ko is not available
5. Offline all hot-pluggable CPUs in preparation for testing
6. Test CPU hot-add error handling by injecting notifier errors
7. Online all hot-pluggable CPUs in preparation for testing
8. Test CPU hot-remove error handling by injecting notifier errors
* tools/testing/selftests/memory-hotplug/on-off-test.sh is doing the
similar thing for memory hotplug.
1. Online all hot-pluggable memory
2. Offline 10% of hot-pluggable memory
3. Online all hot-pluggable memory again
4. Exit if memory-notifier-error-inject.ko is not available
5. Offline 10% of hot-pluggable memory in preparation for testing
6. Test memory hot-add error handling by injecting notifier errors
7. Online all hot-pluggable memory in preparation for testing
8. Test memory hot-remove error handling by injecting notifier errors
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <michael@xxxxxxxxxxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/Makefile | 2
tools/testing/selftests/cpu-hotplug/Makefile | 6
tools/testing/selftests/cpu-hotplug/on-off-test.sh | 221 +++++++++
tools/testing/selftests/memory-hotplug/Makefile | 6
tools/testing/selftests/memory-hotplug/on-off-test.sh | 230 ++++++++++
5 files changed, 464 insertions(+), 1 deletion(-)
diff -puN tools/testing/selftests/Makefile~fault-injection-add-selftests-for-cpu-and-memory-hotplug tools/testing/selftests/Makefile
--- a/tools/testing/selftests/Makefile~fault-injection-add-selftests-for-cpu-and-memory-hotplug
+++ a/tools/testing/selftests/Makefile
@@ -1,4 +1,4 @@
-TARGETS = breakpoints kcmp mqueue vm
+TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug
all:
for TARGET in $(TARGETS); do \
diff -puN /dev/null tools/testing/selftests/cpu-hotplug/Makefile
--- /dev/null
+++ a/tools/testing/selftests/cpu-hotplug/Makefile
@@ -0,0 +1,6 @@
+all:
+
+run_tests:
+ ./on-off-test.sh
+
+clean:
diff -puN /dev/null tools/testing/selftests/cpu-hotplug/on-off-test.sh
--- /dev/null
+++ a/tools/testing/selftests/cpu-hotplug/on-off-test.sh
@@ -0,0 +1,221 @@
+#!/bin/bash
+
+SYSFS=
+
+prerequisite()
+{
+ msg="skip all tests:"
+
+ if [ $UID != 0 ]; then
+ echo $msg must be run as root >&2
+ exit 0
+ fi
+
+ SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
+
+ if [ ! -d "$SYSFS" ]; then
+ echo $msg sysfs is not mounted >&2
+ exit 0
+ fi
+
+ if ! ls $SYSFS/devices/system/cpu/cpu* > /dev/null 2>&1; then
+ echo $msg cpu hotplug is not supported >&2
+ exit 0
+ fi
+}
+
+#
+# list all hot-pluggable CPUs
+#
+hotpluggable_cpus()
+{
+ local state=${1:-.\*}
+
+ for cpu in $SYSFS/devices/system/cpu/cpu*; do
+ if [ -f $cpu/online ] && grep -q $state $cpu/online; then
+ echo ${cpu##/*/cpu}
+ fi
+ done
+}
+
+hotplaggable_offline_cpus()
+{
+ hotpluggable_cpus 0
+}
+
+hotpluggable_online_cpus()
+{
+ hotpluggable_cpus 1
+}
+
+cpu_is_online()
+{
+ grep -q 1 $SYSFS/devices/system/cpu/cpu$1/online
+}
+
+cpu_is_offline()
+{
+ grep -q 0 $SYSFS/devices/system/cpu/cpu$1/online
+}
+
+online_cpu()
+{
+ echo 1 > $SYSFS/devices/system/cpu/cpu$1/online
+}
+
+offline_cpu()
+{
+ echo 0 > $SYSFS/devices/system/cpu/cpu$1/online
+}
+
+online_cpu_expect_success()
+{
+ local cpu=$1
+
+ if ! online_cpu $cpu; then
+ echo $FUNCNAME $cpu: unexpected fail >&2
+ elif ! cpu_is_online $cpu; then
+ echo $FUNCNAME $cpu: unexpected offline >&2
+ fi
+}
+
+online_cpu_expect_fail()
+{
+ local cpu=$1
+
+ if online_cpu $cpu 2> /dev/null; then
+ echo $FUNCNAME $cpu: unexpected success >&2
+ elif ! cpu_is_offline $cpu; then
+ echo $FUNCNAME $cpu: unexpected online >&2
+ fi
+}
+
+offline_cpu_expect_success()
+{
+ local cpu=$1
+
+ if ! offline_cpu $cpu; then
+ echo $FUNCNAME $cpu: unexpected fail >&2
+ elif ! cpu_is_offline $cpu; then
+ echo $FUNCNAME $cpu: unexpected offline >&2
+ fi
+}
+
+offline_cpu_expect_fail()
+{
+ local cpu=$1
+
+ if offline_cpu $cpu 2> /dev/null; then
+ echo $FUNCNAME $cpu: unexpected success >&2
+ elif ! cpu_is_online $cpu; then
+ echo $FUNCNAME $cpu: unexpected offline >&2
+ fi
+}
+
+error=-12
+priority=0
+
+while getopts e:hp: opt; do
+ case $opt in
+ e)
+ error=$OPTARG
+ ;;
+ h)
+ echo "Usage $0 [ -e errno ] [ -p notifier-priority ]"
+ exit
+ ;;
+ p)
+ priority=$OPTARG
+ ;;
+ esac
+done
+
+if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
+ echo "error code must be -4095 <= errno < 0" >&2
+ exit 1
+fi
+
+prerequisite
+
+#
+# Online all hot-pluggable CPUs
+#
+for cpu in `hotplaggable_offline_cpus`; do
+ online_cpu_expect_success $cpu
+done
+
+#
+# Offline all hot-pluggable CPUs
+#
+for cpu in `hotpluggable_online_cpus`; do
+ offline_cpu_expect_success $cpu
+done
+
+#
+# Online all hot-pluggable CPUs again
+#
+for cpu in `hotplaggable_offline_cpus`; do
+ online_cpu_expect_success $cpu
+done
+
+#
+# Test with cpu notifier error injection
+#
+
+DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
+NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/cpu
+
+prerequisite_extra()
+{
+ msg="skip extra tests:"
+
+ /sbin/modprobe -q -r cpu-notifier-error-inject
+ /sbin/modprobe -q cpu-notifier-error-inject priority=$priority
+
+ if [ ! -d "$DEBUGFS" ]; then
+ echo $msg debugfs is not mounted >&2
+ exit 0
+ fi
+
+ if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
+ echo $msg cpu-notifier-error-inject module is not available >&2
+ exit 0
+ fi
+}
+
+prerequisite_extra
+
+#
+# Offline all hot-pluggable CPUs
+#
+echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
+for cpu in `hotpluggable_online_cpus`; do
+ offline_cpu_expect_success $cpu
+done
+
+#
+# Test CPU hot-add error handling (offline => online)
+#
+echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
+for cpu in `hotplaggable_offline_cpus`; do
+ online_cpu_expect_fail $cpu
+done
+
+#
+# Online all hot-pluggable CPUs
+#
+echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_UP_PREPARE/error
+for cpu in `hotplaggable_offline_cpus`; do
+ online_cpu_expect_success $cpu
+done
+
+#
+# Test CPU hot-remove error handling (online => offline)
+#
+echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
+for cpu in `hotpluggable_online_cpus`; do
+ offline_cpu_expect_fail $cpu
+done
+
+echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/CPU_DOWN_PREPARE/error
+/sbin/modprobe -q -r cpu-notifier-error-inject
diff -puN /dev/null tools/testing/selftests/memory-hotplug/Makefile
--- /dev/null
+++ a/tools/testing/selftests/memory-hotplug/Makefile
@@ -0,0 +1,6 @@
+all:
+
+run_tests:
+ ./on-off-test.sh
+
+clean:
diff -puN /dev/null tools/testing/selftests/memory-hotplug/on-off-test.sh
--- /dev/null
+++ a/tools/testing/selftests/memory-hotplug/on-off-test.sh
@@ -0,0 +1,230 @@
+#!/bin/bash
+
+SYSFS=
+
+prerequisite()
+{
+ msg="skip all tests:"
+
+ if [ $UID != 0 ]; then
+ echo $msg must be run as root >&2
+ exit 0
+ fi
+
+ SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
+
+ if [ ! -d "$SYSFS" ]; then
+ echo $msg sysfs is not mounted >&2
+ exit 0
+ fi
+
+ if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
+ echo $msg memory hotplug is not supported >&2
+ exit 0
+ fi
+}
+
+#
+# list all hot-pluggable memory
+#
+hotpluggable_memory()
+{
+ local state=${1:-.\*}
+
+ for memory in $SYSFS/devices/system/memory/memory*; do
+ if grep -q 1 $memory/removable &&
+ grep -q $state $memory/state; then
+ echo ${memory##/*/memory}
+ fi
+ done
+}
+
+hotplaggable_offline_memory()
+{
+ hotpluggable_memory offline
+}
+
+hotpluggable_online_memory()
+{
+ hotpluggable_memory online
+}
+
+memory_is_online()
+{
+ grep -q online $SYSFS/devices/system/memory/memory$1/state
+}
+
+memory_is_offline()
+{
+ grep -q offline $SYSFS/devices/system/memory/memory$1/state
+}
+
+online_memory()
+{
+ echo online > $SYSFS/devices/system/memory/memory$1/state
+}
+
+offline_memory()
+{
+ echo offline > $SYSFS/devices/system/memory/memory$1/state
+}
+
+online_memory_expect_success()
+{
+ local memory=$1
+
+ if ! online_memory $memory; then
+ echo $FUNCNAME $memory: unexpected fail >&2
+ elif ! memory_is_online $memory; then
+ echo $FUNCNAME $memory: unexpected offline >&2
+ fi
+}
+
+online_memory_expect_fail()
+{
+ local memory=$1
+
+ if online_memory $memory 2> /dev/null; then
+ echo $FUNCNAME $memory: unexpected success >&2
+ elif ! memory_is_offline $memory; then
+ echo $FUNCNAME $memory: unexpected online >&2
+ fi
+}
+
+offline_memory_expect_success()
+{
+ local memory=$1
+
+ if ! offline_memory $memory; then
+ echo $FUNCNAME $memory: unexpected fail >&2
+ elif ! memory_is_offline $memory; then
+ echo $FUNCNAME $memory: unexpected offline >&2
+ fi
+}
+
+offline_memory_expect_fail()
+{
+ local memory=$1
+
+ if offline_memory $memory 2> /dev/null; then
+ echo $FUNCNAME $memory: unexpected success >&2
+ elif ! memory_is_online $memory; then
+ echo $FUNCNAME $memory: unexpected offline >&2
+ fi
+}
+
+error=-12
+priority=0
+ratio=10
+
+while getopts e:hp:r: opt; do
+ case $opt in
+ e)
+ error=$OPTARG
+ ;;
+ h)
+ echo "Usage $0 [ -e errno ] [ -p notifier-priority ] [ -r percent-of-memory-to-offline ]"
+ exit
+ ;;
+ p)
+ priority=$OPTARG
+ ;;
+ r)
+ ratio=$OPTARG
+ ;;
+ esac
+done
+
+if ! [ "$error" -ge -4095 -a "$error" -lt 0 ]; then
+ echo "error code must be -4095 <= errno < 0" >&2
+ exit 1
+fi
+
+prerequisite
+
+#
+# Online all hot-pluggable memory
+#
+for memory in `hotplaggable_offline_memory`; do
+ online_memory_expect_success $memory
+done
+
+#
+# Offline $ratio percent of hot-pluggable memory
+#
+for memory in `hotpluggable_online_memory`; do
+ if [ $((RANDOM % 100)) -lt $ratio ]; then
+ offline_memory_expect_success $memory
+ fi
+done
+
+#
+# Online all hot-pluggable memory again
+#
+for memory in `hotplaggable_offline_memory`; do
+ online_memory_expect_success $memory
+done
+
+#
+# Test with memory notifier error injection
+#
+
+DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
+NOTIFIER_ERR_INJECT_DIR=$DEBUGFS/notifier-error-inject/memory
+
+prerequisite_extra()
+{
+ msg="skip extra tests:"
+
+ /sbin/modprobe -q -r memory-notifier-error-inject
+ /sbin/modprobe -q memory-notifier-error-inject priority=$priority
+
+ if [ ! -d "$DEBUGFS" ]; then
+ echo $msg debugfs is not mounted >&2
+ exit 0
+ fi
+
+ if [ ! -d $NOTIFIER_ERR_INJECT_DIR ]; then
+ echo $msg memory-notifier-error-inject module is not available >&2
+ exit 0
+ fi
+}
+
+prerequisite_extra
+
+#
+# Offline $ratio percent of hot-pluggable memory
+#
+echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
+for memory in `hotpluggable_online_memory`; do
+ if [ $((RANDOM % 100)) -lt $ratio ]; then
+ offline_memory_expect_success $memory
+ fi
+done
+
+#
+# Test memory hot-add error handling (offline => online)
+#
+echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
+for memory in `hotplaggable_offline_memory`; do
+ online_memory_expect_fail $memory
+done
+
+#
+# Online all hot-pluggable memory
+#
+echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_ONLINE/error
+for memory in `hotplaggable_offline_memory`; do
+ online_memory_expect_success $memory
+done
+
+#
+# Test memory hot-remove error handling (online => offline)
+#
+echo $error > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
+for memory in `hotpluggable_online_memory`; do
+ offline_memory_expect_fail $memory
+done
+
+echo 0 > $NOTIFIER_ERR_INJECT_DIR/actions/MEM_GOING_OFFLINE/error
+/sbin/modprobe -q -r memory-notifier-error-inject
_
Subject: Subject: fault-injection: add selftests for cpu and memory hotplug
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
linux-next.patch
ocfs2-use-find_last_bit.patch
ocfs2-use-bitmap_weight.patch
string-introduce-memweight.patch
string-introduce-memweight-fix.patch
string-introduce-memweight-fix-build-error-caused-by-memweight-introduction.patch
qnx4fs-use-memweight.patch
dm-use-memweight.patch
affs-use-memweight.patch
video-uvc-use-memweight.patch
ocfs2-use-memweight.patch
ext2-use-memweight.patch
ext3-use-memweight.patch
ext4-use-memweight.patch
fault-injection-notifier-error-injection.patch
cpu-rewrite-cpu-notifier-error-inject-module.patch
pm-pm-notifier-error-injection-module.patch
memory-memory-notifier-error-injection-module.patch
powerpc-pseries-reconfig-notifier-error-injection-module.patch
fault-injection-add-selftests-for-cpu-and-memory-hotplug.patch
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