linux_kernel/tools/testing/selftests/pstore/pstore_crash_test

#!/bin/sh

# pstore_crash_test - Pstore test shell script which causes crash and reboot
#
# Copyright (C) Hitachi Ltd., 2015
#  Written by Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
#
# Released under the terms of the GPL v2.

# exit if pstore backend is not registered
. ./common_tests

prlog "Causing kernel crash ..."

# enable all functions triggered by sysrq
echo 1 > /proc/sys/kernel/sysrq
# setting to reboot in 3 seconds after panic
echo 3 > /proc/sys/kernel/panic

# save uuid file by different name because next test execution will replace it.
mv $TOP_DIR/uuid $TOP_DIR/prev_uuid

# create a file as reboot flag
touch $REBOOT_FLAG
sync

# cause crash
# Note: If you use kdump and want to see kmesg-* files after reboot, you should
#       specify 'crash_kexec_post_notifiers' in 1st kernel's cmdline.
echo c > /proc/sysrq-trigger