80 lines
2.3 KiB
Bash
Executable File
80 lines
2.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# https://www.kernel.org/doc/Documentation/blockdev/zram.txt
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apt install -y insserv
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apt install -y zram-tools # Provides /etc/default/zramswap
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CORES=1 # By default, zramswap-start will use all available cores.
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PERCENTAGE=10 # Specifies percentage of available RAM that should be used for zram
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ALLOCATION=256 # static amount of RAM that should be used, in MiB
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PRIORITY=100 # Specifies the priority for the swap devices, see swapon(2)
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#sed -i '/^#CORES=.*/ s/.*/&\nCORES=\"\"/' /etc/default/zramswap
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sed -i '/^#PERCENTAGE=.*/ s/.*/&\nPERCENTAGE=\"\"/' /etc/default/zramswap
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sed -i '/^#ALLOCATION=.*/ s/.*/&\nALLOCATION=\"\"/' /etc/default/zramswap
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sed -i '/^#PRIORITY=.*/ s/.*/&\nPRIORITY=\"\"/' /etc/default/zramswap
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#sed -i 's,^\(CORES=\).*,\1'\"${CORES}\"',' /etc/default/zramswap
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sed -i 's,^\(PERCENTAGE=\).*,\1'\"${PERCENTAGE}\"',' /etc/default/zramswap
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sed -i 's,^\(ALLOCATION=\).*,\1'\"${ALLOCATION}\"',' /etc/default/zramswap
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sed -i 's,^\(PRIORITY=\).*,\1'\"${PRIORITY}\"',' /etc/default/zramswap
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# https://wiki.debian.org/ZRam
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cat > /etc/init.d/zram <<'EOF'
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#!/bin/sh
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### BEGIN INIT INFO
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# Provides: zram
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# Required-Start: $local_fs
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# Required-Stop: $local_fs
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# Default-Start: S
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# Default-Stop: 0 1 6
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# Short-Description: Use compressed RAM as in-memory swap
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# Description: Use compressed RAM as in-memory swap
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### END INIT INFO
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# Author: Antonio Galea <antonio.galea@gmail.com>
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# Thanks to Przemysław Tomczyk for suggesting swapoff parallelization
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# Distributed under the GPL version 3 or above, see terms at
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# https://gnu.org/licenses/gpl-3.0.txt
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FRACTION=75
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MEMORY=`perl -ne'/^MemTotal:\s+(\d+)/ && print $1*1024;' < /proc/meminfo`
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CPUS=`nproc`
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SIZE=$(( MEMORY * FRACTION / 100 / CPUS ))
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case "$1" in
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"start")
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param=`modinfo zram|grep num_devices|cut -f2 -d:|tr -d ' '`
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modprobe zram $param=$CPUS
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for n in `seq $CPUS`; do
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i=$((n - 1))
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echo $SIZE > /sys/block/zram$i/disksize
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mkswap /dev/zram$i
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swapon /dev/zram$i -p 10
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done
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;;
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"stop")
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for n in `seq $CPUS`; do
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i=$((n - 1))
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swapoff /dev/zram$i && echo "disabled disk $n of $CPUS" &
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done
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wait
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sleep .5
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modprobe -r zram
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;;
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"status")
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swapon -s
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;;
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*)
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echo "Usage: `basename $0` (start | stop)"
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exit 1
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;;
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esac
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EOF
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chmod +x /etc/init.d/zram
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insserv zram
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