ZRAM on the Jornada
Regarding Zram: I use it already for a few weeks - it works very well on the Jornada. A Kernel module is already in the new 3.16.81 folder. I configured the script to use 50% of the RAM as Zram - at least on a system with 128MB RAM this works very well. You can edit the “FRACTION=” value - it defines the percentage of your RAM that is used for Zram.
- make sure you have the folder with the latest Kernel modules in your /lib/modules folder: http://www.sp-net.at/nextcloud/s/SQbqbX64QdZarop?path=%2Fkernel3.16.81
- copy the attached script to /etc/init.d/zram
- Make the script executable:
$ sudo chmod +x /etc/init.d/zram
-make sure the insserv package is installed (it provides a easy way to add scripts to SysV)
$ sudo apt-get install insserv
-and add zram so that it starts automatically at boot
$ sudo insserv zram
Now reboot your Jornada!
Script:
# Author: Antonio Galea <antonio.galea@gmail.com>
#
# Thanks to Przemysław Tomczyk for suggesting swapoff parallelization
# Distributed under the GPL version 3 or later, see terms at
# https://gnu.org/licenses/gpl-3.0.txt
### BEGIN INIT INFO
# Provides: zram
# Required-Start: $local_fs
# Required-Stop: $local_fs
# Default-Start: S
# Default-Stop: 0 1 6
# Short-Description: Use compressed RAM as in-memory swap
# Description: Use compressed RAM as in-memory swap
### END INIT INFO
FRACTION=50
MEMORY=$(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 --priority 10
done
;;
stop)
for n in $(seq $CPUS)
do
i=$((n - 1))
swapoff /dev/zram$i && echo "zram: disabled disk $n of $CPUS" &
done
wait
sleep .5
modprobe --remove zram
;;
*)
echo "Usage: $(basename $0) (start | stop)"
exit 1
;;
esac
# End of file