#!/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