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#!/bin/sh
set -e
device=$1
if [ "$device" = "" ]; then
echo "Usage: zram-swap-init <device>"
exit 1
fi
# Allocate zram to be size of actual system memory
# Note: zram is only allocated when used. When swapped pages compress with a
# a 2:1 ratio zram will require 50% of system memory (while allowing to use
# 150% memory).
ZRAM_SIZE_PERCENT=100
ZRAM_ALGORITHM=lz4
[ -f /etc/default/zram ] && . /etc/default/zram || true
memtotal=$(grep MemTotal /proc/meminfo | awk ' { print $2 } ')
memzram=$(($memtotal*${ZRAM_SIZE_PERCENT}/100))
# Try loading zram module
modprobe -q zram || true
zramctl -a ${ZRAM_ALGORITHM} -s ${memzram}KB $device
mkswap -L "zram-swap" $device
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