64 MB less total memory on 24.2.1

[ovacikar]

Armbianmonitor:

https://paste.armbian.com/editiqaxim

I have flashed the last 23.8 bookworm lite image to my lepotato 1GB model, and it launched with 927 MB total memory.

 

running apt update ; apt upgrade ; reboot it drops to 862M

 

How can I reclaim the remaining memory? This is mostly a headless server i do not need any GPU. just basic hdmi output for troubleshooting purposes.

 

before: 

Welcome to Armbian 23.8.1 Bookworm with Linux 6.1.50-current-meson64

System load:   8%               Up time:       4 min
Memory usage:  13% of 927M       IP:          
CPU temp:      48°C               Usage of /:    4% of 29G

After:

Welcome to Armbian 24.2.1 Bookworm with Linux 6.6.16-current-meson64

System load:   19%               Up time:       1 min
Memory usage:  13% of 862M       IP:          

 

 

 

Edited March 31 by ovacikar

[SteeMan]

My suggestion since I assume you don't have an armbianmonitor output from before your upgrade, would be to use armbian-config and go back to a 6.1 kernel and see if it is the kernel that is causing the difference.  If so then provide an armbianmonitor output with the old kernel and look at the memory info in the output to see where the difference is.

[ovacikar]

It does not let me roll back kernel, but offers me a newer kernel.

 

I could just flash the image again and freeze the armbian kernel upgrades to stay on 6.1 ?

[Werner]

16 minutes ago, SteeMan said:

u don't have an armbianmonitor output from before your upgrade

Actually there is.

 

### meminfo:

MemTotal:         949752 kB

 

And after:

 

### meminfo:

MemTotal:         882904 kB

 

Maybe uboot issue with memory detection?

[c0rnelius]

The 6.6.y kernel for reasons I have yet to figure out reads the MEM wrong. 6.7 and up is not affected by this. Nor is 6.1 to 6.5.

 

I would have thought after so many REVS this would have been resolved, but I have yet to see it come up as a topic of discussion. This in my experience is also not PLATFORM specific. It happens on all my boards regardless of SoC and PLATFORM.

[c0rnelius]

Add this to your cmdline.

 

swiotlb=0

 

https://github.com/raspberrypi/linux/commit/3e0065d1cb5bd58e35e0c7722ffe6303dfe0364f

[ovacikar]

Thanks, I am in a change freeze now on stable 6.1 kernel , will revisit after Apr 8th.

Edited March 31 by ovacikar

[ovacikar]

Where was I supposed to apply this, /boot/armbianEnv.txt ?

 

so far no luck, memtotal 882 MB again

 

 https://paste.armbian.com/ereciriyon

 

 

 

 

 

 

Edited April 5 by ovacikar

[c0rnelius]

Try adding it this way.

extraargs=swiotlb=0

 

[ovacikar]

Yes , this fixed the memory . Thanks !

I can no longer edit the post subject  - to mark it solved.

 

Edited April 9 by ovacikar