#!/bin/bash
#
# ksmtuned     Kernel Samepage Merging (KSM) Tuning Daemon
#
# Author:      Dan Kenigsberg <danken@redhat.com>
#
# Copyright 2009 Red Hat, Inc. and/or its affiliates.
# Released under the GPL
#
# chkconfig: 345 85 15
# description: The KSM tuning daemon controls whether (and with what vigor) \
#              ksm should ksm search duplicated pages.
# processname: ksmtuned
# config: /etc/ksmtuned.conf
# pidfile: /var/run/ksmtuned.pid
#
### BEGIN INIT INFO
# Provides: ksmtuned
# Required-Start:
# Required-Stop:
# Should-Start:
# Default-Start: 3 4 5
# Short-Description: tune the speed of ksm
# Description: The Kernel Samepage Merging control Daemon is a simple script
#   that controls whether (and with what vigor) should ksm search duplicated
#   memory pages.
#   needs testing and ironing. contact danken@redhat.com if something breaks.
### END INIT INFO

. /etc/rc.d/init.d/functions

prog=ksmtuned
ksmtuned=/usr/sbin/ksmtuned
pidfile=${PIDFILE-/var/run/ksmtune.pid}
RETVAL=0

start() {
    echo -n $"Starting $prog: "
    daemon --pidfile=${pidfile} $ksmtuned
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
}

stop() {
    echo -n $"Stopping $prog: "
    killproc -p ${pidfile}
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$prog
}

restart() {
    stop
    start
}

condrestart() {
    [ -e /var/lock/subsys/$prog ] && restart || :
}

case "$1" in
  start)
	start
	;;
  stop)
	stop
	;;
  status)
        status -p ${pidfile} $prog
	RETVAL=$?
	;;
  restart|force-reload)
	restart
	;;
  condrestart|try-restart)
	condrestart
	;;
  retune)
        pid=`cat ${pidfile} 2> /dev/null`
        RETVAL=$?
        if [ -z "$pid" ]; then
	    echo $"Cannot retune, service is not running."
	else
            kill -SIGUSR1 $pid
            RETVAL=$?
	fi
        ;;
  *)
	echo $"Usage: $prog {start|stop|restart|force-reload|condrestart|try-restart|status|retune|help}"
	RETVAL=2
esac

exit $RETVAL