rootdir/etc/init.qcom.zram.sh

#!/system/bin/sh
# Copyright (c) 2014, The Linux Foundation. All rights reserved.
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# The script will check total_ram and enable zram for devices with total_ram
# less or equals to 1GB

MemTotalStr=`cat /proc/meminfo | grep MemTotal`
MemTotal=${MemTotalStr:16:8}
ZRAM_THRESHOLD=1048576
IsLowMemory=0
((IsLowMemory=MemTotal<ZRAM_THRESHOLD?1:0))
if [ $IsLowMemory -eq 1 ]; then
    setprop ro.config.zram true
fi