eylles/zram-service

a simplle zram initscript

ZRAM service

this is a simple init script compatible with sysvinit to set up zram.

this script depends on a posix shell interpreter, core utilities and zramctl

why ?

looked at other services and scripts for using zram and they were a mess to be honest

usage

the makefile should put the script in /etc/init.d/zram by default, after that a simple sudo update-rc.d zram defaults should be enough to activate it for the next boot

the service script supports the start, stop, restart and status actions along the init, end, stat and force-restart aliases.

TODO

• make a release
• add debian packaging "paperwork"
• perhaps add an action in the makefile to create a .deb

zram-service's Issues

Robin Twiggs

Hi There,

Thanks for sharing this code, which I have found to be accurate and useful.

I've made a small modification to zram.sh which you may find useful.

After 'PRIORITY=100':
MEM_LIMIT_PERCENTAGE=0

Before 'echo "zram device initiated"':
if [ ${MEM_LIMIT_PERCENTAGE} -gt 0 ]; then
MEM_LIMIT_SIZE=$(( MEMORY_TOTAL * MEM_LIMIT_PERCENTAGE / 100));
echo "${MEM_LIMIT_SIZE}" > /sys/block/zram0/mem_limit
fi;

This allowed me to set MEM_LIMIT_PERCENTAGE=20 and RAM_PERCENTAGE=60 in /etc/default/zram-config
when I'm expecting a compression ratio of 3,
so that I can be confident my MEM_LIMIT_PERCENTAGE will not be exceeded under any conditions.