Raspberry Pi 5 - Fails to Enable Memory cgroup despite correct kernel parameters. about linux

[Borillion]

😅 @mrsauravsahu , very strange. I was using sudo and it did not work. Mine are not symlinks.

I was able to have the kernel cmdline take effect with one important change in the method I used.
Edit the file directly on the microsd mounted on a different device. Using sudo to edit the file while the Pi is running the OS does nothing, the obvious hint in hindsight was the output from cat /proc/cmdline not having the options listed.

[zhengyi13]

You're not the only one to notice this:

• k3s-io/k3s#8890
• https://forums.raspberrypi.com/viewtopic.php?t=359827

Looks like the underlying issue is a change in the location for cmdline.txt.

ETA: well, I misread your initial report; my bad. If you've got that file in /boot/firmware as documented in https://www.raspberrypi.com/documentation/computers/configuration.html#the-boot-folder, I wonder what's broken?

[mrsauravsahu]

I was facing the same issue, when installing k3s on Rpi5

Updating my /boot/cmdline.txt to the snippet below fixed the issue, the pi is part of my cluster with k3s running.

console=serial0,115200 console=tty1 root=PARTUUID=ff577c67-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles cgroup_memory=1 cgroup_enable=memory

[Borillion]

I was facing the same issue, when installing k3s on Rpi5

Updating my /boot/cmdline.txt to the snippet below fixed the issue, the pi is part of my cluster with k3s running.

console=serial0,115200 console=tty1 root=PARTUUID=ff577c67-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles cgroup_memory=1 cgroup_enable=memory

Do you mean /boot/firmware/cmdline on Raspberry Pi OS ?

My /boot/cmdline.txt says not to edit the file and that the contents have moved.

Did you install any other packages?

[mrsauravsahu]

/boot/cmdline.txt

Yes looks like the file is actually a symlink to /boot/firmware/cmdline.txt/, and it is write protected. Edit it using root.

sudo vim /boot/cmdline.txt

I had also run these two commands but they didn't fix the issue.

sudo rpi-update
sudo rpi-eeprom-update

[lukfd]

I would like to clarify that the k3s documentation specify that it is a requirement to append cgroup_memory=1 cgroup_enable=memory to the /boot/cmdline.txt file. I had to make the cmdline.txt modification right after downloading the OS in the SD card.