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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Is it possiable to use domU's balloon in dom0 user program?
On Thu, 2013-04-18 at 03:45 +0100, Dan Magenheimer wrote: > > From: Ian Campbell [mailto:Ian.Campbell@xxxxxxxxxx] > > Sent: Monday, April 15, 2013 3:19 AM > > To: Demon King > > Cc: xen-devel@xxxxxxxxxxxxx > > Subject: Re: [Xen-devel] Is it possiable to use domU's balloon in dom0 user > > program? > > > > On Sat, 2013-04-13 at 11:21 +0100, Demon King wrote: > > > Our team want designed a program in dom0 to control vm's memory > > > through balloon, such as to increasing balloon memery of vm1 and then > > > other vm will use it later. Is it possiable to do this?Thank you! > > > > I'm not 100% what you are asking but if you are asking if you can reduce > > a domain's memory with ballooning and the subsequently (either > > immediately or later) increase the memory allocation of another domain > > using that slack memory then the answer is yes. > > > > The only constraint is that in the absence of memory hotplug (which is > > present in mainline kernels but not AFAIK support yet by most > > toolstacks) you cannot balloon a guest up to more than its original > > memmax= value, note that it is possible to boot a PV domain with less > > current allocation than its maxmem ("preballooned") and using PoD and > > suitable PV drivers the same can be done with some types of HVM guest. > > Any chance you are trying to do what xenballoond does? See > the source tree under tools/xenballoon (or google "xenballoond.README"). > Note that this code is five years old, is distro dependent, and is now > completely unsupported. It was the first step toward transcendent > memory, which has replaced it. Should we be removing it then? Like so: 8<---------------------------------------------------------------- >From 7ca4b6b7a92b1ff94be88c40378e1844bd0cc26a Mon Sep 17 00:00:00 2001 From: Ian Campbell <ian.campbell@xxxxxxxxxx> Date: Thu, 18 Apr 2013 08:48:28 +0100 Subject: [PATCH] xenballoond: remove as it is now obsolete + unsupported code Dan, the author, states: > this code is five years old, is distro dependent, and is now > completely unsupported. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Cc: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> --- tools/xenballoon/xenballoon-monitor | 59 ------- tools/xenballoon/xenballoon.conf | 136 ----------------- tools/xenballoon/xenballoond | 283 ----------------------------------- tools/xenballoon/xenballoond.README | 85 ----------- tools/xenballoon/xenballoond.init | 92 ----------- 5 files changed, 0 insertions(+), 655 deletions(-) delete mode 100644 tools/xenballoon/xenballoon-monitor delete mode 100644 tools/xenballoon/xenballoon.conf delete mode 100644 tools/xenballoon/xenballoond delete mode 100644 tools/xenballoon/xenballoond.README delete mode 100644 tools/xenballoon/xenballoond.init diff --git a/tools/xenballoon/xenballoon-monitor b/tools/xenballoon/xenballoon-monitor deleted file mode 100644 index c23cd39..0000000 --- a/tools/xenballoon/xenballoon-monitor +++ /dev/null @@ -1,59 +0,0 @@ -#!/bin/bash -# -# xenballoon-monitor - monitor certain stats from xenballoond -# (run in dom0 with "watch -d xenballoon-monitor" for xentop-like output) -# updated 090610 to include tmem stats -# -# Copyright (C) 2009 Oracle Corporation and/or its affiliates. -# All rights reserved -# Written by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> -# -# Hint: Use "xm sched-credit -d 0 -w 2000" to watch on heavily loaded machines -# -TMEMTMP=$(/bin/mktemp -q /tmp/xenballoon-monitor.XXXXXX) -echo "id mem-kb tgt-kb commit swapin swapout pgin pgout preswap precache" -for i in `xenstore-list /local/domain`; do - if [ "$i" -ne 0 ]; then - tot=0; tgt=0; sin=0; sout=0; pgin=0; pgout=0; cmt=0; up=0; idle=0; - act=0; preswap=0; precache=0 - if xenstore-exists /local/domain/$i/memory/meminfo; then - tot=`xenstore-read /local/domain/$i/memory/meminfo | grep MemTotal \ - | sed 's/[^1-9]*\([1-9][0-9]*\).*/\1/'` - cmt=`xenstore-read /local/domain/$i/memory/meminfo | grep Committed_AS \ - | sed 's/[^1-9]*\([1-9][0-9]*\).*/\1/'` - fi - if xenstore-exists /local/domain/$i/memory/selftarget; then - tgt=`xenstore-read /local/domain/$i/memory/selftarget` - fi - if xenstore-exists /local/domain/$i/memory/vmstat; then - sin=$(xenstore-read /local/domain/$i/memory/vmstat | tr '\\\n' '\n' \ - | grep pswpin | cut -d" " -f2) - sout=$(xenstore-read /local/domain/$i/memory/vmstat | tr '\\\n' '\n' \ - | grep pswpout | cut -d" " -f2) - pgin=$(xenstore-read /local/domain/$i/memory/vmstat | tr '\\\n' '\n' \ - | grep pgpgin | cut -d" " -f2) - pgout=$(xenstore-read /local/domain/$i/memory/vmstat | tr '\\\n' '\n' \ - | grep pgout | cut -d" " -f2) - fi - xm tmem-list --all --long > $TMEMTMP - precache=`grep "C=CI:$i" $TMEMTMP | sed 's/C=CI.*Ec:\([0-9][0-9]*\).*/\1/'` - if xenstore-exists /local/domain/$i/memory/preswap; then - preswap=`xenstore-read /local/domain/$i/memory/preswap` - printf "%2d %8d%8d%8d%7d%8d%9d%9d%9d%9d\n" $i $tot $tgt $cmt $sin $sout $pgin $pgout $preswap $precache - else - printf "%2d %8d%8d%8d%9d%9d%10d%10d\n" $i $tot $tgt $cmt $sin $sout $pgin $pgout - fi - fi -done -echo -n Free memory: `xm info | grep free | sed 's/[^1-9]*\([1-9][0-9]*\).*/\1/'` MiB " " -tmem_free_pages=`grep "G=" $TMEMTMP | sed 's/G=.*Ta:\([0-9][0-9]*\).*/\1/'` -if [ ! -z "$tmem_free_pages" ]; then - let "tmem_free_mb=$tmem_free_pages/256" - echo -n Idle tmem: $tmem_free_mb MiB " " -fi -tmem_eph_pages=`grep "G=" $TMEMTMP | sed 's/G=.*Ec:\([0-9][0-9]*\).*/\1/'` -if [ ! -z "$tmem_eph_pages" ]; then - let "tmem_eph_mb=$tmem_eph_pages/256" - echo -n Ephemeral tmem: $tmem_eph_mb MiB -fi -echo "" diff --git a/tools/xenballoon/xenballoon.conf b/tools/xenballoon/xenballoon.conf deleted file mode 100644 index a1ca902..0000000 --- a/tools/xenballoon/xenballoon.conf +++ /dev/null @@ -1,136 +0,0 @@ -## Path: System/xen -## Description: xen domain start/stop on boot -## Type: string -## Default: - -# NOTE: "xenbus is enabled" means not only that /proc/xen/xenbus exists -# but also that /usr/bin/xenstore-* tools are installed. - -## Type: boolean -## Default: false -# -# If XENBALLOON_SELF is true, selfballooning will occur, meaning the -# balloon driver will grow and shrink according to available memory. -# If xenbus is enabled, may be overridden by {memory/selfballoon}==0 -# If false but xenballoond is able to communicate with domain0 via -# xenbus, balloon targets will be set by domain0 -# -XENBALLOON_SELF=false - -## Type: integer (must be > 0) -## Default: 1 -# -# If self-ballooning, number of seconds between checks/adjustments. -# If xenbus is enabled, may be overridden by {memory/interval} -XENBALLOON_SELF_INTERVAL=1 - -## Type: integer (must be > 0) -## Default: 1 -# -# If NOT self-ballooning but xenbus is enabled, number of seconds between -# checks/adjustments. May be overridden by {memory/interval} -XENBALLOON_INTERVAL=1 - -## Type: integer (must be > 0) -## Default: 10 -# -# When current > target, reduces rate at which target memory is ballooned -# out. For a value of n, 1/n of the difference will be ballooned. -# This value applies both to selfballooning and directed ballooning. -# May be overridden by {memory/downhysteresis} -XENBALLOON_AUTO_DOWNHYSTERESIS=10 - -## Type: integer (must be > 0) -## Default: 1 -# -# When current < target, reduces rate at which target memory is reclaimed -# (if available). For a value of n, 1/n of the difference will be ballooned. -# This value applies both to selfballooning and directed ballooning. -# May be overridden by {memory/uphysteresis} -XENBALLOON_AUTO_UPHYSTERESIS=1 - -## Type: integer (must be >= 0) -## Default: 0 -# -# In order to avoid ballooning so much memory that a guest experiences -# out-of-memory errors (OOMs), memory will not be ballooned out below -# a minimum target, in MB. If this value is 0 (default), an heuristic -# based on the maximum amount of memory will be used. (The heuristic -# provides the same minimum as recent versions of the balloon driver but -# early versions of the balloon driver did not enforce a minimum.) -XENBALLOON_MINMEM=0 - -## Type: string -## Default: "/var/run/xenballoon-maxmem" -# -# Location where memory high-water mark is stored; if a guest supports -# hot-add memory, maxmem might increase across time and the minimum -# target heuristic is based on max memory. NOTE: Reboot after changing -# this variable, else overballooning may occur. -XENBALLOON_MAXMEMFILE=/var/run/xenballoon-maxmem - -## Type: integer (0 or 1) -## Default: 1 -# -# If xenbus is enabled, whether selfballooning or directed ballooning, -# place the result of 'cat /proc/meminfo" on xenbus at memory/meminfo -XENBALLOON_SEND_MEMINFO=1 - -## Type: integer (0 or 1) -## Default: 1 -# -# If xenbus is enabled, whether selfballooning or directed ballooning, -# place the result of 'cat /proc/vmstat" on xenbus at memory/vmstat -XENBALLOON_SEND_VMSTAT=1 - -## Type: integer (0 or 1) -## Default: 1 -# -# If xenbus is enabled, whether selfballooning or directed ballooning, -# place the result of 'cat /proc/uptime" on xenbus at memory/uptime -XENBALLOON_SEND_UPTIME=1 - -## Type: boolean -## Default: false -# -# If tmem is running, pages swapped to a swap disk may instead go -# into preswap. These pages may become stale (i.e. no longer need -# to be saved because, e.g., the process owning them has gone away) -# and stale pages use precious precious domain-allocated memory. -# Periodically try to reduce preswap to squeeze out stale pages -XENBALLOON_PRESWAP_SHRINK=false - -## Type: string -## Default: "/proc/sys/vm/preswap" -## (change to /sys/proc/vm/preswap in later kernels) -# -# If tmem and preswap are running, reading this file gives the number of -# pages currently in preswap. Writing it with N invokes the preswap_shrink -# routine to reduce preswap to N pages. -XENBALLOON_PRESWAP_SYSFILE=/proc/sys/vm/preswap - -## Type: integer (must be > 0) -## Default: 20 -# -# If tmem and preswap are running, attempts to reduce number of pages -# currently in preswap. For a value of n, 1/n of the pages will -# be attempted to be shrunk. -# If xenbus is enabled, may be overridden by {memory/preswaphysteresis} -XENBALLOON_PRESWAP_HYSTERESIS=20 - -## Type: integer (must be > 0) -## Default: 10 -# -# Number of ballooning intervals where preswap size remains at N pages -# before preswap shrinking is attempted. Also if shrinking fails to -# shrink to the target, counter resets to this value. -# If xenbus is enabled, may be overridden by {memory/preswapinertia} -XENBALLOON_PRESWAP_INERTIA=10 - -## Type: integer (0 or 1) -## Default: 1 -# -# If xenbus is enabled, whether selfballooning or directed ballooning, -# place the size of preswap (in pages) on xenbus at memory/preswap -XENBALLOON_SEND_PRESWAP=1 - diff --git a/tools/xenballoon/xenballoond b/tools/xenballoon/xenballoond deleted file mode 100644 index 121aa3e..0000000 --- a/tools/xenballoon/xenballoond +++ /dev/null @@ -1,283 +0,0 @@ -#!/bin/bash -# -# Copyright (C) 2008 Oracle Corporation and/or its affiliates. -# All rights reserved. -# Written by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> -# -# xenballoond - In-guest engine for Xen memory ballooning -# Original version: 080630 -# Updated 0906XX: add tmem preswap auto-shrinking -# -# Two self-ballooning "policies" are implemented: -# - Selfballooning: Adjust memory periodically, with no (or little) input -# from domain0. Target memory is determined solely by the -# Committed_AS line in /proc/meminfo, but parameters may adjust -# the rate at which the target is achieved. -# - Directed ballooning: Adjust memory solely as directed by domain0 -# -# Under some circumstances, "output" may also be generated; the contents -# of /proc/meminfo and /proc/vmstat may be periodically placed on xenbus. -# -# If xenbus is running and the /usr/bin/xenstore-* tools are installed, -# "xenbus is enabled". -# -# Parameters are documented in <SYSCONFIG>/xenballoon.conf. Although -# some are not used with directed ballooning, all must be set properly. -# If xenbus is enabled, some of these parameters may be overridden by values -# set by domain0 via xenbus. - -minmb() { - RETVAL=$XENBALLOON_MINMEM - if [ $RETVAL -ne 0 ]; then - return $RETVAL - fi - kb=`cat $XENBALLOON_MAXMEMFILE` - let "mb=$kb/1024" - let "pages=$kb/4" - # this algorithm from drivers/xen/balloon/balloon.c:minimum_target() - # which was added to balloon.c in 2008 to avoid ballooning too small - # it is unnecessary here except to accomodate pre-2008 balloon drivers - # note that ranges are adjusted because a VM with "memory=1024" - # gets somewhat less than 1024MB - if [ $mb -lt 125 ]; then - let RETVAL="$(( 8 + ($pages >> 9) ))" - elif [ $mb -lt 500 ]; then - let RETVAL="$(( 40 + ($pages >> 10) ))" - elif [ $mb -lt 2000 ]; then - let RETVAL="$(( 104 + ($pages >> 11) ))" - else - let RETVAL="$(( 296 + ($pages >> 13) ))" - fi - return # value returned in RETVAL in mB -} - -curkb() { - kb=`grep MemTotal /proc/meminfo | sed 's/ */ /' | \ - cut -f2 -d' '` - RETVAL=$kb - return # value returned in RETVAL in kB -} - -downhysteresis() { - RETVAL=$XENBALLOON_AUTO_DOWNHYSTERESIS - if [ $xenstore_enabled = "true" ]; then - if xenstore-exists memory/downhysteresis ; then - RETVAL=`xenstore-read memory/downhysteresis` - fi - fi - return -} - -uphysteresis() { - RETVAL=$XENBALLOON_AUTO_UPHYSTERESIS - if [ $xenstore_enabled = "true" ]; then - if xenstore-exists memory/uphysteresis ; then - RETVAL=`xenstore-read memory/uphysteresis` - fi - fi - return -} - -selfballoon_eval() { - if [ $xenstore_enabled = "true" ]; then - if xenstore-exists memory/selfballoon; then - RETVAL=`xenstore-read memory/selfballoon` - if [ $RETVAL -eq 1 ]; then - selfballoon_enabled=true - return - fi - fi - fi - selfballoon_enabled=$XENBALLOON_SELF - return -} - -selftarget() { - tgtkb=`grep Committed_AS /proc/meminfo | sed 's/ */ /' | cut -f2 -d' '` - minmb - let "minbytes=$RETVAL*1024*1024" - let "tgtbytes=$tgtkb*1024" - if [ $tgtbytes -lt $minbytes ]; then - let "tgtbytes=$minbytes" - fi - RETVAL=$tgtbytes # value returned in RETVAL in bytes - return -} - -# $1 == 1 means use selftarget, else target in kB -balloon_to_target() { - if [ "$1" -eq 1 ]; then - selftarget - tgtbytes=$RETVAL - else - let "tgtbytes=$(( $1 * 1024 ))" - fi - curkb - let "curbytes=$RETVAL*1024" - if [ $curbytes -gt $tgtbytes ]; then - downhysteresis - downhys=$RETVAL - if [ $downhys -ne 0 ]; then - let "tgtbytes=$(( $curbytes - \ - ( ( $curbytes - $tgtbytes ) / $downhys ) ))" - fi - else if [ $curbytes -lt $tgtbytes ]; then - uphysteresis - uphys=$RETVAL - let "tgtbytes=$(( $curbytes + \ - ( ( $tgtbytes - $curbytes ) / $uphys ) ))" - fi - fi - echo $tgtbytes > /proc/xen/balloon - if [ $xenstore_enabled = "true" ]; then - let "tgtkb=$(( $tgtbytes/1024 ))" - xenstore-write memory/selftarget $tgtkb - fi -} - -send_memory_stats() { - if [ ! $xenstore_enabled = "true" ]; then - return - fi - if [ $XENBALLOON_SEND_MEMINFO ]; then - xenstore-write memory/meminfo "`cat /proc/meminfo`" - fi - if [ $XENBALLOON_SEND_VMSTAT ]; then - xenstore-write memory/vmstat "`cat /proc/vmstat`" - fi - if [ $XENBALLOON_SEND_UPTIME ]; then - xenstore-write memory/uptime "`cat /proc/uptime`" - fi -} - - -curpreswappages() { - pages=$(cat $XENBALLOON_PRESWAP_SYSFILE) - RETVAL=$pages - return # value returned in RETVAL in pages -} - -preswaphysteresis() { - RETVAL=$XENBALLOON_PRESWAP_HYSTERESIS - if [ $xenstore_enabled = "true" ]; then - if xenstore-exists memory/preswaphysteresis ; then - RETVAL=`xenstore-read memory/preswaphysteresis` - fi - fi - return -} - -preswapinertia() { - RETVAL=$XENBALLOON_PRESWAP_INERTIA - if [ $xenstore_enabled = "true" ]; then - if xenstore-exists memory/preswapinertia ; then - RETVAL=`xenstore-read memory/preswapinertia` - fi - fi - return -} - -send_preswap_stats() { - if [ ! $xenstore_enabled = "true" ]; then - return - fi - curpreswappages - preswap_pgs=$RETVAL - if [ $XENBALLOON_SEND_PRESWAP ]; then - xenstore-write memory/preswap "$preswap_pgs" - fi -} - -shrink_preswap() { - if [ "$XENBALLOON_PRESWAP_SHRINK" = "false" ]; then - return - fi - if [ ! -f "$XENBALLOON_PRESWAP_SYSFILE" ]; then - return - fi - curpreswappages - preswaplast=$preswapnow - preswapnow=$RETVAL - if [ $preswapnow -eq 0 -o $preswapnow -ne $preswaplast ]; then - preswapinertia - preswapinertiacounter=$RETVAL - return - fi - let "preswapinertiacounter=$preswapinertiacounter-1" - if [ $preswapinertiacounter -ne 0 ]; then - return - fi - preswaphysteresis - preswaphys=$RETVAL - if [ $preswaphys -eq 0 ]; then - return - fi - let "tgtpreswappages=$(( $preswapnow - \ - ( $preswapnow / $preswaphys ) ))" - preswapinertia - preswapinertiacounter=$RETVAL - echo $tgtpreswappages > "$XENBALLOON_PRESWAP_SYSFILE" -} - -if [ ! -f /proc/xen/balloon ]; then - echo "$0: no balloon driver installed" - exit 0 -fi -if [ ! -f /proc/meminfo ]; then - echo "$0: can't read /proc/meminfo" - exit 0 -fi -xenstore_enabled=true -if [ -f /usr/bin/xenstore-exists -a -f /usr/bin/xenstore-read -a \ - -f /usr/bin/xenstore-write ]; then - xenstore_enabled=true -else - echo "$0: missing /usr/bin/xenstore-* tools, disabling directed ballooning" - xenstore_enabled=false -fi -preswapnow=0 - -# See docs/misc/distro_mapping.txt -if [ -f /etc/sysconfig/xenballoon.conf ]; then - . /etc/sysconfig/xenballoon.conf -elif [ -f /etc/default/xenballoon.conf ]; then - . /etc/default/xenballoon.conf -fi - -while true; -do - # handle special case for PV domains with hot-add memory - if [ ! -f $XENBALLOON_MAXMEMFILE ]; then - maxkb=0 - else - maxkb=`cat $XENBALLOON_MAXMEMFILE` - fi - curkb=`grep MemTotal /proc/meminfo | sed 's/ */ /' | cut -f2 -d' '` - if [ $curkb -gt $maxkb ]; then - echo $curkb > $XENBALLOON_MAXMEMFILE - fi - interval=$XENBALLOON_INTERVAL - # do self-ballooning - selfballoon_eval - if [ $selfballoon_enabled = "true" ]; then - balloon_to_target 1 - interval=$XENBALLOON_SELF_INTERVAL - # or do directed ballooning - elif [ $xenstore_enabled = "true" ]; then - if xenstore-exists memory/target ; then - tgtkb=`xenstore-read memory/target` - balloon_to_target $tgtkb - fi - interval=$XENBALLOON_INTERVAL - fi - shrink_preswap - send_memory_stats - send_preswap_stats - if [ $xenstore_enabled = "true" ]; then - if xenstore-exists memory/interval ; then - interval=`xenstore-read memory/interval` - fi - fi - sleep $interval -done & - diff --git a/tools/xenballoon/xenballoond.README b/tools/xenballoon/xenballoond.README deleted file mode 100644 index 9084898..0000000 --- a/tools/xenballoon/xenballoond.README +++ /dev/null @@ -1,85 +0,0 @@ -Xenballoond.README -Preliminary version 0.1, 2008/06/30 - -Copyright (C) 2008 Oracle Corporation and/or its affiliates. -All rights reserved. -Written by Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> - -INTRODUCTION - -Xenballoond runs in guest domains and both implements selfballooning and -provides metrics to dom0 for (future) directed ballooning. Both capabilities -provide a foundation for basic "memory overcommit" functionality. - -With selfballooning enabled, xenballoond uses the Committed_AS value found -in /proc/meminfo as a first approximation of how much memory is required -by the guest and feeds this statistic back to the balloon driver to inflate -or deflate the balloon as required to achieve the target guest memory size. -Hysteresis parameters may be adjusted to rate-limit balloon inflation -and deflation. - -If configured, certain selfballooning parameters -- including notably -enabling/disabling of self-ballooning -- can be controlled from domain0. -(These are fully documented in xenballoon.conf.) - -If configured, the following guest statistics are sent back to domain0: -- /proc/meminfo -- /proc/vmstat -- /proc/uptime -In a future release, some of these values will be used by a policy module -in domain0 to control guest balloon size and provide memory balancing -across all guests on a given system. - -Note that no page sharing (content-based or otherwise) is implemented -and no VMM-based swapping is necessary. - -For more information, see: -http://www.xen.org/files/xensummitboston08/MemoryOvercommit-XenSummit2008.pdf -http://wiki.xensource.com/xenwiki/Open_Topics_For_Discussion?action=AttachFile&do=get&target=Memory+Overcommit.pdf - -INSTALLATION AND DEPLOYMENT - -In this preliminary release: -- directed ballooning is not implemented, though a monitor is provided -- only Redhat-based guests are supported - -Guest prerequisites to use xenballoond: -- each guest must be configured with adequate[1] swap space -- each guest must have the balloon driver installed (/proc/xen/balloon exists) -- if directed ballooning (or monitoring) is desired, xenstore tools must be - installed in each guest in /usr/bin [2] - -[1] for best results, for a guest that is configured with maxmem=N and - requires Z MB of swap space without xenballoond, available swap should - be increased to N+Z MB when xenballoond is running -[2] specifically xenstore-read, xenstore-exists, and xenstore-write must - be installed. Binaries can be obtained, for example, by building - xen-vvv.gz/tools in a guest-binary-compatible development tree - -Instructions to install/deploy xenballoond: - (see docs/misc/distro_mapping.txt for SYSCONFIG and INITD_DIR definitions) -- in each guest: - - ensure pre-requisites are met (see above) - - place xenballoon.conf in <SYSCONFIG> - - place xenballoond in /usr/sbin - - copy xenballoond.init to <INITD_DIR>/xenballoond (note file rename) - - edit <SYSCONFIG>/xenballoond.conf as desired (especially note that - selfballooning defaults as off) - - start xenballoond with "service xenballoond start", and/or configure - xenballoond to start at init - (Red Hat e.g. "chkconfig xenballoond on") - (Debian e.g. " update-rc.d xenballoond defaults") - (Suse e.g. " insserv xenballoond") -- in domain0: - - if monitoring is desired, xenballoon-monitor may be installed in /usr/sbin -- note that certain xenballoond.conf variables may be overridden by domain0 - if xenstore is running in the guest; these are fully documented in - xenballoond.conf - -TODO: -080630 domain0 ballooning policy module -080630 experiment with more aggressive (optionally) memory minimum targets -080630 BUG: xenballoond doesn't properly record the fact that it's running; - e.g. flipping between run levels 5 and 3 launches additional daemons -080630 BUG: reports of possible incompatibilites between ballooning and - save/restore/migrate have not been duplicated diff --git a/tools/xenballoon/xenballoond.init b/tools/xenballoon/xenballoond.init deleted file mode 100644 index 5cd0fb3..0000000 --- a/tools/xenballoon/xenballoond.init +++ /dev/null @@ -1,92 +0,0 @@ -#!/bin/bash -# -# xenballoond Script to start and stop Xen ballooning daemon. -# -# Copyright (C) 2009 Oracle Corporation and/or its affiliates. -# All rights reserved. -# Written by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> -# -# chkconfig: 2345 98 01 -# description: Starts and stops the Xen ballooning daemon. -### BEGIN INIT INFO -# Provides: xenballoond -# Required-Start: $syslog $remote_fs -# Should-Start: -# Required-Stop: $syslog $remote_fs -# Should-Stop: -# Default-Start: 3 5 -# Default-Stop: 0 1 2 6 -# Short-Description: Start/stop xenballoond -# Description: Starts and stops the Xen ballooning daemon. -### END INIT INFO - -# Source function library -. /etc/init.d/functions - -#don't use in domain0 -[ -f /proc/xen/capabilities ] && \ - grep -q "control_d" /proc/xen/capabilities && exit 0 - -if [ -f /etc/sysconfig/xenballoon.conf ]; then - . /etc/sysconfig/xenballoon.conf -elif [ -f /etc/default/xenballoon.conf ]; then - . /etc/default/xenballoon.conf -fi - -# Check that balloon driver is present -[ ! -f /proc/xen/balloon ] && exit 0 - -# Record original memory (in kB) -[ -z "$XENBALLOON_MAXMEMFILE" ] && exit 0 -let maxmem=`grep MemTotal /proc/meminfo | sed 's/ */ /' | cut -f2 -d' '` -if [ -f "$XENBALLOON_MAXMEMFILE" ]; then - let oldmax=`cat $XENBALLOON_MAXMEMFILE` - if [ $oldmax -gt $maxmem ]; then - let maxmem=oldmax - fi -fi -echo $maxmem > $XENBALLOON_MAXMEMFILE - -RETVAL=0 -prog="xenballoond" - -start() { - # Start daemons. - echo -n $"Starting $prog: " - daemon xenballoond $OPTIONS - RETVAL=$? - echo - return $RETVAL -} - -stop() { - echo -n $"Shutting down $prog: " - killproc xenballoond - RETVAL=$? - echo - return $RETVAL -} - -# See how we were called. -case "$1" in - start) - start - ;; - stop) - stop - ;; - status) - status xenballoond - RETVAL=$? - ;; - restart|reload) - stop - start - RETVAL=$? - ;; - *) - echo $"Usage: $0 {start|stop|restart|status}" - exit 1 -esac - -exit $RETVAL -- 1.7.2.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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