• sales

    +86-0755-88291180

Milk-V Duo Tutorial【Enable virtual RAM memory】

Virtual memory is a technology in the operating system that is used to expand the capacity of a computer's physical memory (RAM). It works by storing some data on the disk and loading active data from the disk into memory to meet the memory requirements of processes.


1】Virtual memory has the following advantages:

Expanded memory capacity: 

Virtual memory allows the operating system to expand the available memory capacity when physical memory is insufficient. It moves less frequently used data to a swap file on the disk to free up memory for other processes.

Running more programs: 

Virtual memory makes it possible to run multiple programs simultaneously. Each program is allocated a portion of virtual memory, so even if physical memory cannot accommodate all the data of all programs at the same time, memory usage can be switched by swapping data to the disk.

Larger address space: 

Virtual memory allows each process to access a larger address space beyond the limitations of physical memory. Processes can perceive a contiguous block of memory space, even though their data is actually scattered across physical memory and the disk.

Better memory management: 

Virtual memory can automatically manage memory paging (dividing memory into fixed-sized pages), provide memory protection (preventing processes from accessing memory beyond their boundaries), and implement mechanisms such as memory sharing and memory mapping.


Virtual memory offers significant advantages in terms of memory expansion and multitasking, but it also introduces performance overhead and additional complexity. In modern computer systems, virtual memory is an essential component and is widely used in various operating systems.


2】Enabling virtual memory in milkv-Duo:

Before using, make sure that milkv-Duo is using the system image Duo-V1.0.4 or above.

Enter the following commands in the terminal:

mkswap /dev/mmcblk0p3

swapon /dev/mmcblk0p3

Enter 'free -h' to check if virtual memory is enabled.


TAG: Jetson Nano 4G module Raspberry Pi LCD 3D Display spotpear Multi Protection Raspberry Pi CM5 Compute Module 5 Dual Gigabit Ethernet RJ45 Expansion IO Base Board electronic Tag XIAO RA4M1 Tiny SuperMini Board For Arduino Uno IDE For SeeedStudio R7FA4M1 ESP32 S3 Development Board 1.85 inch Round LCD Display 360×360 QMI8658 Sensor / MIC / SD /MP3 Audio /Battery Port LVGL/HMI For Arduino ESP-NOW Control Pi5 Active Cooler ESP32 S3 N16R8 Development board 1.9 inch LCD Display 1.9inch TouchScreen 170×320 SD-Port RGB LED QMI8658 6-Axis ST7789 CST816 Modbus RTU 8-ch Relay Module (D) 360° PC Monitor Screen 1.47 inch LCD AXS5106L TouchScreen JD9853 Display 172x320 For Arduino/Raspberry Pi/Pico/ESP32 1.54inch OLED Raspberry Pi 24.5 inch Type C/HDMI 2K Display 24.5inch Screen 2560x1440 Computer PC Phone For Xbox/PS4/Switch ESP32 C6 Development Board 1.47 inch LCD Display Screen ST7789 For Arduino WiFi6/LVGL/HMI Onborad SD-Port/RGB-LED ESP32 C3 1.44inch LCD Raspberry Pi Pico 2 RP2350 2 inch LCD Capacitive TouchScreen Development Board 240x320 Display QMI8658 6-Axis /OV5640 Camera /SD /Battery Port