#!/bin/bash
# William Lam
# http://engineering.ucsb.edu/~duonglt/vmware/
# hot-add memory to LINUX system using vSphere ESX(i) 4.0
# 08/09/2009

if [ "$UID" -ne "0" ]
	then
 	echo -e "You must be root to run this script.\nYou can 'sudo' to get root access"
 	exit 1
fi


for MEMORY in $(ls /sys/devices/system/memory/ | grep memory)
do
	SPARSEMEM_DIR="/sys/devices/system/memory/${MEMORY}"
	echo "Found sparsemem: \"${SPARSEMEM_DIR}\" ..."
	SPARSEMEM_STATE_FILE="${SPARSEMEM_DIR}/state"
	STATE=$(cat "${SPARSEMEM_STATE_FILE}" | grep -i online)
	if [ "${STATE}" == "online" ]; then
		echo -e "\t${MEMORY} already online"
	else
		echo -e "\t${MEMORY} is new memory, onlining memory ..."
		echo online > "${SPARSEMEM_STATE_FILE}"
	fi
done