The ram in the FLX1 is not enough for my usual daily routine (opening Firefox, Tuba, Fractal, Signal (in Android container) and using all of them for a while). Usually, then my firefox gets unresponsive or phosh gets ultra slow or even unusable.
I would therefore like to add a little bit of swap (but still of course want the already configured zram "swap" to come first / have higher prio). Unfortunately I don't find where it is configured (it's not in /etc/fstab or in /lib/init/fstab) in order to set its priority higher than the one of my new swap (for which I can't give negative prio in /etc/fstab). By default, my new swap gets prio -2 and /dev/block/zram0 gets -3, so the wrong order. Any ideas?
What do you think of generally configuring swap space as a default for all flx1 devices? Or do you fear the storage might suffer from this?
Or do you have other ideas that are better than adding swap?
#!/bin/bash
# 2.5G
size=$((2560 * 1024 * 1024))
swap_file="/swapfile"
sudo dd if=/dev/zero of=$swap_file bs=1M count=$((size / 1024 / 1024)) status=progress
sudo chmod 600 $swap_file
sudo mkswap $swap_file
sudo swapon --priority -3 $swap_file
swapon --show
free -h
using this, i got:
cat /proc/swaps
Filename Type Size Used Priority
/dev/block/zram0 partition 3128848 1014124 -2
/swapfile file 2621436 0 -3
so zram is now -2 and swapfile is -3
it can be made as a script and enabled with systemd, something like:
[Unit]
Description=setup swap on startup
After=lxc@android.service
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/bin/setup-swap.sh
[Install]
WantedBy=graphical.target
Thanks! but please do note that with the most recent updates if you create a systemd service to launch right after the lxc service it will break wifi.
For those reading to prevent this just make the systemd service run 2 mins after boot with
[Timer] OnBootSec=2min
praveen 11/12/2024 6:56 pm
@jakes2me-com this does not help, even with this wifi is disabled on reboot. I have to disable the service, reboot again and start the service. So at present the automation is not working.
praveen 11/12/2024 6:59 pm
@jakes2me-com do you know which service enables wifi? May be we should start this after wifi is enabled.
Dogman 12/12/2024 7:40 am
yeah it broke for me last update too for some reason and sadly its not the wifi service from what I found, I found its because of "After=lxc@android.service" in the bootscript i.e its the driver loading service.
To fix this for me at least, I usually dont need the swap right away after boot, so I manually made an onboot script thats set for 10 mins after boot at thats it lol. Phone is unlikely to be booting for 10 mins and will usually be about 5 so 5 after boot aint half bad vs not having wifi.
[Unit]
Description=setup swap on startup
[Timer]
OnBootSec=10min
[Service]
Type=oneshot
RemainAfterExit=no
ExecStart=/usr/bin/swapmaker.sh
[Install]
WantedBy=graphical.target
Thanks a lot, I did not know that swapon accepts negative priorities whereas /etc/fstab doesn't.
I think more people find this option useful and it'd be good to add support for this directly in settings.
$ cat /etc/systemd/zram-generator.conf.d/librem5.conf
[zram0]
zram-fraction = 2
max-zram-size = none
Does this make sense for FLX1 as well ? Originally for Librem 5.
https://forums.puri.sm/t/why-and-how-to-extend-zram-on-l5-a-revolution-for-librem-5-stability/24046/34?u=pirate_praveen 
The following worked for me and it's faster since you don't re-create a swap file you already created, this is using a second swap file called /swapfile2:
Create second swap file:
sudo dd if=/dev/zero of=/swapfile2 bs=1G count=4 sudo mkswap /swapfile2 && sudo chmod 0600 /swapfile2
Add a script to /usr/bin/swapon.sh the #!/bin/bash may not be needed here since the service runs /bin/bash not sure
#!/bin/bash # Turn on second swap file after boot swap_file="/swapfile2" sudo swapon --priority -3 $swap_file
Add a service to /etc/systemd/system/swapon.service
[Unit] Description=turn on second swap on startup [Timer] OnBootSec=3min [Service] Type=oneshot RemainAfterExit=no ExecStart=/bin/bash /usr/bin/swapon.sh [Install] WantedBy=multi-user.target
Adjust service permissions:
$ chmod 644 /etc/systemd/system/swapon.service
