How to limit RAM mounted for OS in VF50

hi, we try to switch off half of RAM in VF50 to check if it affects the power consumption. In linux-toradex/arch/arm/boot/dts/vf500-colibri.dtsi
there’s a RAM definition
memory {
reg = <0x80000000 0x8000000>;
};
but changing 0x8000000 to 0x4000000 doesn’t affect RAM available to the system…
Is there another configuration file setting it up?

1 Like

Hi @tomasz.ciesla !

Could you please share how you deployed the modified device tree on the module?

Also, which BSP and kernel version are you using?

Best regards,

meta-freescale → branch Zeus
kernel 4.4.223
what do you mean by how you deployed device tree? the include tree of dts:

Hi @tomasz.ciesla !

The Yocto branch that you are using (Zeus) is not supported by Toradex. Please refer to the Embedded Linux Release Matrix article.

The latest Yocto branch supported is Rocko.

The question is how you built it and how you deployed it to the module.

Please refer to the deployment method for BSP 2.8 (Legacy Method): https://developer.toradex.com/knowledge-base/build-u-boot-and-linux-kernel-from-source-code#iMX_7_and_Vybrid_Based_Modules_V26_and_newer

Best regards,