optimize无法进行tab补全
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#!/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=200
MEMORY=`perl -ne'/^MemTotal:\s+(\d+)/ && print $1*1024;' < /proc/meminfo`
CPUS=`grep -c processor /proc/cpuinfo`
SIZE=$(( 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
;;
"optimize")
for n in `seq $CPUS`; do
i=$((n - 1))
echo $i
echo 1 > /sys/block/zram$i/compact
done
echo 1 > /proc/sys/vm/compact_memory
;;
*)
echo "Usage: `basename $0` (start | stop | optimize )"
exit 1
;;
esac