Initial commit.

010_zram.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+cat > /etc/init.d/zram <<'EOF'
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          zram
+# Required-Start:    $local_fs
+# Required-Stop:     $local_fs
+# Default-Start:     S
+# Default-Stop:      0 1 6
+# Short-Description: Use compressed RAM as in-memory swap
+# Description:       Use compressed RAM as in-memory swap
+### END INIT INFO
+
+# Author: Antonio Galea <antonio.galea@gmail.com>
+# Thanks to Przemysław Tomczyk for suggesting swapoff parallelization
+# Distributed under the GPL version 3 or above, see terms at
+#      https://gnu.org/licenses/gpl-3.0.txt
+
+FRACTION=75
+
+MEMORY=`perl -ne'/^MemTotal:\s+(\d+)/ && print $1*1024;' < /proc/meminfo`
+CPUS=`nproc`
+SIZE=$(( MEMORY * FRACTION / 100 / CPUS ))
+
+case "$1" in
+  "start")
+    param=`modinfo zram|grep num_devices|cut -f2 -d:|tr -d ' '`
+    modprobe zram $param=$CPUS
+    for n in `seq $CPUS`; do
+      i=$((n - 1))
+      echo $SIZE > /sys/block/zram$i/disksize
+      mkswap /dev/zram$i
+      swapon /dev/zram$i -p 10
+    done
+    ;;
+  "stop")
+    for n in `seq $CPUS`; do
+      i=$((n - 1))
+      swapoff /dev/zram$i && echo "disabled disk $n of $CPUS" &
+    done
+    wait
+    sleep .5
+    modprobe -r zram
+    ;;
+  "status")
+    swapon -s
+    ;;
+  *)
+    echo "Usage: `basename $0` (start | stop)"
+    exit 1
+    ;;
+esac
+EOF
+
+chmod +x /etc/init.d/zram
+
+insserv zram