563054a863
- Don't try to set max_kernel_pages during ksm init on newer kernels
(#558281)
- Add logfile options for ksmtuned debug.
97 lines
2.0 KiB
Bash
97 lines
2.0 KiB
Bash
#!/bin/bash
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#
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# ksm Kernel Samepage Merging
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#
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# Author: Dan Kenigsberg <danken@redhat.com>
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#
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# Copyright 2009 Red Hat, Inc. and/or its affiliates.
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# Released under the GPL
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#
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# chkconfig: 345 84 16
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# description: The KSM init script starts and stops the ksm kernel thread.
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# config: /etc/sysconfig/ksm
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#
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### BEGIN INIT INFO
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# Provides: ksm
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# Required-Start:
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# Required-Stop:
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# Should-Start:
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# Default-Start: 3 4 5
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# Short-Description: start and stop ksm
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# Description: The KSM init script starts and stops the ksm kernel thread.
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### END INIT INFO
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. /etc/rc.d/init.d/functions
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if [ -f /etc/sysconfig/ksm ]; then
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. /etc/sysconfig/ksm
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fi
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prog=ksm
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RETVAL=0
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# unless KSM_MAX_KERNEL_PAGES is set, let ksm munch up to half of total memory.
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default_max_kernel_pages () {
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local total pagesize
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total=`awk '/^MemTotal:/ {print $2}' /proc/meminfo`
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pagesize=`getconf PAGESIZE`
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echo $[total * 1024 / pagesize / 2]
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}
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start() {
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echo -n $"Starting $prog: "
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if [ -f /sys/kernel/mm/ksm/max_kernel_pages ]; then
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KSM_MAX_KERNEL_PAGES=${KSM_MAX_KERNEL_PAGES:-`default_max_kernel_pages`}
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echo $KSM_MAX_KERNEL_PAGES > /sys/kernel/mm/ksm/max_kernel_pages
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fi
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echo 1 > /sys/kernel/mm/ksm/run
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RETVAL=$?
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[ $RETVAL = 0 ] && success $"$prog startup" || failure $"$prog startup"
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echo
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return $RETVAL
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}
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stop() {
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echo -n $"Stopping $prog: "
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echo 0 > /sys/kernel/mm/ksm/run
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RETVAL=$?
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[ $RETVAL = 0 ] && success $"$prog shutdown" || failure $"$prog shutdown"
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echo
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}
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status() {
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if [ ! -f /sys/kernel/mm/ksm/run ] ; then
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echo $"$prog not supported"
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RETVAL=1
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else if [ "$(cat /sys/kernel/mm/ksm/run 2>/dev/null)" != "1" ]; then
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echo $"$prog is not running"
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RETVAL=1
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else
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echo $"$prog is running"
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RETVAL=0
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fi; fi
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}
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case "$1" in
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start)
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start
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;;
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stop)
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stop
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;;
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status)
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status
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;;
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restart)
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stop
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start
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;;
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condrestart)
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;;
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*)
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echo $"Usage: $prog {start|stop|restart|condrestart|status|help}"
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RETVAL=3
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esac
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exit $RETVAL
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