--- /dev/null
+#! /bin/sh
+#
+# kdump
+#
+# Description: The kdump script provides the support:
+# 1. Load a kdump kernel image into memory;
+# 2. Copy away vmcore when system panic.
+#
+
+#default
+KDUMP_KVER="`uname -r`"
+KDUMP_KIMAGE="/boot/bzImage-${KDUMP_KVER}"
+KDUMP_CMDLINE="`cat /proc/cmdline`"
+KDUMP_CMDLINE_APPEND="kdump_needed maxcpus=1 irqpoll reset_devices"
+KDUMP_VMCORE_PATH="/var/crash/`date +"%Y-%m-%d"`"
+
+#get right kernel image
+march="`uname -m`"
+case ${march} in
+ x86*|i?86)
+ ;;
+ *)
+ KDUMP_KIMAGE="/boot/uImage-${KDUMP_KVER}"
+ ;;
+esac
+
+KEXEC=usr/sbin/kexec
+KEXEC_ARGS="-p"
+
+MAKEDUMPFILE=/usr/bin/makedumpfile
+MAKEDUMPFILE_ARGS="-E -d 1"
+
+LOGGER="logger -p info -t kdump"
+
+if [ -f /etc/sysconfig/kdump.conf ]; then
+ . /etc/sysconfig/kdump.conf
+fi
+
+do_check()
+{
+ #check makedumpfile
+ if [ ! -e ${MAKEDUMPFILE} -o ! -x ${MAKEDUMPFILE} ] ;then
+ echo "No makedumpfile found."
+ return 1;
+ fi
+
+ #check kexec
+ if [ ! -e ${KEXEC} -o ! -x ${KEXEC} ] ;then
+ echo "No kexec found."
+ return 1;
+ fi
+
+ #check whether kdump kernel image exists on the system
+ if [ ! -f ${KDUMP_KIMAGE} ]; then
+ echo "No kdump kernel image found."
+ return 1
+ fi
+}
+
+do_save_vmcore()
+{
+ mkdir -p ${KDUMP_VMCORE_PATH}
+ echo "Saving a vmcore to ${KDUMP_VMCORE_PATH}."
+
+ ${MAKEDUMPFILE} ${MAKEDUMPFILE_ARGS} /proc/vmcore ${KDUMP_VMCORE_PATH}/vmcore-"`date +"%H:%M:%S"`"
+# cp --sparse=always /proc/vmcore ${KDUMP_VMCORE_PATH}/vmcore-"`date +"%H:%M:%S"`"
+ rc=$?
+ if [ ${rc} == 0 ]; then
+ ${LOGGER} "Saved a vmcore to ${KDUMP_VMCORE_PATH}."
+ else
+ ${LOGGER} "Failed to save vmcore!"
+ fi
+ return ${rc}
+}
+
+do_start()
+{
+ #check file
+ do_check
+
+ #check whether the running kernel supports kdump.
+ if [ ! -e /sys/kernel/kexec_crash_loaded ]; then
+ echo "Kdump isn't supported on the running kernel!!!"
+ ${LOGGER} "Kdump isn't supported on the running kernel!!!"
+ return 1
+ fi
+
+ #check whether kdump kernel image has been loaded
+ rc=`cat /sys/kernel/kexec_crash_loaded`
+ if [ ${rc} != 0 ]; then
+ echo "Kdump is already running.";
+ ${LOGGER} "Kdump is already running."
+ return 0
+ fi
+
+ #check the running kernel cmdline option,insure "crashkenrel=" always set.
+ grep -q crashkernel= /proc/cmdline
+ if [ $? != 0 ]; then
+ echo "Kdump isn't supported on the running kernel,please check boot option!!!"
+ ${LOGGER} "Kdump isn't supported on the running kernel,please check boot option!!!"
+ return 1
+ fi
+
+ #handle kdump cmdline parameters, remove some useless options
+ kcmdline=""
+ for x in `cat /proc/cmdline`; do
+ case $x in
+ crashkernel*)
+ ;;
+ *)
+ kcmdline="${kcmdline} $x"
+ ;;
+ esac
+ done
+
+ KDUMP_CMDLINE="${kcmdline} ${KDUMP_CMDLINE_APPEND}"
+
+ #Load the kdump kernel image
+ ${KEXEC} ${KEXEC_ARGS} "${KDUMP_KIMAGE}" --append="${KDUMP_CMDLINE}"
+ if [ $? != 0 ]; then
+ echo "Failed to load kdump kernel!"
+ ${LOGGER} "Failed to load kdump kernel!"
+ return 1
+ fi
+
+ echo "Kdump started up."
+ ${LOGGER} "Kdump started up."
+}
+
+do_stop()
+{
+ ${KEXEC} -p -u 2>/dev/null
+ if [ $? == 0 ]; then
+ echo "Kdump has been stopped."
+ ${LOGGER} "Kdump has been stopped."
+ else
+ echo "Failed to stop kdump!"
+ ${LOGGER} "Failed to stop kdump!"
+ fi
+}
+
+case "$1" in
+ start)
+ if [ -s /proc/vmcore ]; then
+ do_save_vmcore
+ reboot
+ else
+ do_start
+ fi
+ ;;
+ restart)
+ do_stop
+ do_start
+ ;;
+ stop)
+ do_stop
+ ;;
+ *)
+ echo $"Usage: $0 {start|stop|restart}"
+ exit 1
+esac
+
+exit $?
--- /dev/null
+#the kdump kernel version string.
+#KDUMP_KVER="`uname -r`"
+
+#this will be passed to the kdump kernel as kdump kernel command line, it
+#usually comes from /proc/cmdline
+#KDUMP_CMDLINE="`cat /proc/cmdline`"
+
+# append arguments to the kdump commandline
+#KDUMP_CMDLINE_APPEND="kdump_needed maxcpus=1 irqpoll reset_devices"
+
+#the kernel image for kdump
+#KDUMP_KIMAGE="/boot/bzImage-${KDUMP_KVER}"
+
+#Where to save the vmcore
+#KDUMP_VMCORE_PATH="/var/crash/`date +"%Y-%m-%d"`"
+
+#the arguments to makedumpfile
+MAKEDUMPFILE_ARGS="--dump-dmesg -x /boot/vmlinux-`uname -r`"
