zram-generator doesn't create zram device

Question

I try to used zram-generator to create a zram device but it doesn't work.

I followed the steps listed in the README.md from the github repository.

• Install zram-generator using one of the methods listed above.
• Create a zram-generator.conf config file.
• Run systemctl daemon-reload to create new device units.
• Run systemctl start /dev/zram0 (adjust the name as appropriate to match the config).
• Call zramctl or swapon to confirm that the device has been created and is in use.

1. I installed zram-generator using cargo with the command cargo install zram-generator
2. I created zram-generator.conf in /etc/systemd/zram-generator.conf

[zram0]
host-memory-limit = none
zram-size = min(ram / 2, 8192) # I have 16Go of RAM on my host

3. I ran systemctl daemon-reload
4. Then I ran systemctl start /dev/zram0 but it timeout after a while
5. zramctl return nothing and swapon --show return

NAME      TYPE      SIZE USED PRIO
/dev/sda4 partition  16G   0B   -2

Even a reboot changes nothing.

Did I do something wrong?

Answer 1

try with this conf instead ?

[zram0]
zram-size = ram / 2 
compression-algorithm = zstd
[zram1]
options = X-mount.mode=1777
mount-point = /var/compressed