From 74bc2dbf1dfe9efa5d38ee76c5d003c025e2ad79 Mon Sep 17 00:00:00 2001
From: Yunqi Ouyang <oyyq9999999@163.com>
Date: Fri, 24 May 2019 15:46:21 +0800
Subject: [PATCH] add zram config

---
 add-qtum/03-setup-zram/00-run.sh  |  7 +++++++
 add-qtum/03-setup-zram/files/zram | 26 ++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100755 add-qtum/03-setup-zram/00-run.sh
 create mode 100644 add-qtum/03-setup-zram/files/zram

diff --git a/add-qtum/03-setup-zram/00-run.sh b/add-qtum/03-setup-zram/00-run.sh
new file mode 100755
index 0000000..3c4c9bd
--- /dev/null
+++ b/add-qtum/03-setup-zram/00-run.sh
@@ -0,0 +1,7 @@
+#!/bin/bash -e
+
+install -m 755 files/zram "${ROOTFS_DIR}/etc/init.d/"
+
+on_chroot << EOF
+systemctl enable zram
+EOF
diff --git a/add-qtum/03-setup-zram/files/zram b/add-qtum/03-setup-zram/files/zram
new file mode 100644
index 0000000..db2e961
--- /dev/null
+++ b/add-qtum/03-setup-zram/files/zram
@@ -0,0 +1,26 @@
+#!/bin/bash
+### BEGIN INIT INFO
+# Provides:          zram
+# Required-Start:
+# Required-Stop:
+# Default-Start: 3
+# Default-Stop:
+# Short-Description: Boost memory performance
+# Description:
+### END INIT INFO
+cores=$(nproc --all)
+modprobe zram num_devices=$cores
+
+swapoff -a
+
+totalmem=`free | grep -e "^Mem:" | awk '{print $2}'`
+mem=$(( ($totalmem / $cores)* 1024 ))
+
+core=0
+while [ $core -lt $cores ]; do
+  echo $mem > /sys/block/zram$core/disksize
+  echo lz4 > /sys/block/zram$core/comp_algorithm
+  mkswap /dev/zram$core
+  swapon -p 5 /dev/zram$core
+  let core=core+1
+done