Allow configuration of the swap size via /etc/default/haos-swapfile file. By
setting the SWAPSIZE variable in this file, swapfile get recreated on the next
reboot to the defined size. Size can be either in bytes or with optional units
(B/K/M/G, accepting some variations but always interpreted as power of 10). The
size is then rounded to 4k block size. If no override is defined or the value
can't be parsed, it falls back to previously used 33% of system RAM.
Fixes#968
Pull in the swapfile creation service haos-swapfile.service when
swap.target is reached. This makes sure the service is started even when
other targets are used (e.g. rescue.target).
* Use zswap instead of swap in zram
This requires a swap file which will get generated automatically on
startup.
* Fix file size and free disk space comparison
* Set zswap factor to 33%
* Set vm.swappiness to 1
Decrease swapping to a minimum. This is also recommended for database
work loads by the MariaDB documentation. In practice it causes the least
amount of writes to disk when under memory pressure, while still making
swap available when needed.
Jan Čermák
Stefan Agner