WO2020119213A1

WO2020119213A1 - Methods for generating and loading mirror file, and device

Info

Publication number: WO2020119213A1
Application number: PCT/CN2019/107170
Authority: WO
Inventors: 初德进
Original assignee: 海信视像科技股份有限公司
Priority date: 2018-12-11
Filing date: 2019-09-23
Publication date: 2020-06-18
Also published as: CN109683983A; CN109683983B

Abstract

Methods for generating and loading a mirror file, and a device. The method comprises: an intelligent device processing and storing original data in a non-system memory by mapping the same to a kernel virtual space according a physical address; and compressing said original data, and original data in a system memory, to generate a corresponding mirror file. The method enables all important data required for system recovery to be thoroughly stored in a mirror file, thereby ensuring integrity of the mirror file. Accordingly, when an intelligent device performs system recovery on the basis of the mirror file, problems such as screen color distortion or blank screen resulting from loss of important data can be avoided, thereby ensuring smooth and quick startup of the intelligent device.

Description

Method and device for generating and loading image file

Cross-reference of related applications

This application requires the priority of the Chinese patent application filed on December 11, 2018, with the application number 201811510641.6, which is entitled "A method and device for generating and loading image files", the entire content of which is incorporated by reference in In this application.

Technical field

The invention relates to computer technology, in particular to a method for generating and loading image files.

Background technique

At present, in order to speed up the booting or bright screen speed and improve the user experience, smart devices based on Linux technology (such as smart TVs) usually prestore the recovered data in double-rate synchronous dynamic random access memory (Double Data Rate).

In the process of DC switching on and off, the smart device will adopt the standby to memory (Suspend To Ram, STR) technology, that is, to retain the power supply of DDR during standby, make it enter the self-refresh mode, and save the recovered data in DDR. , Read the recovery data directly from DDR to recover to the state before standby and continue to run.

In the process of AC switching on and off, to speed up the booting, the standby to hard disk (Suspend To Dis, STD) technology is usually used, which describes the system operating status before standby, makes a corresponding image file, and saves it to non-volatile memory. For example, in an Embedded Multimedia Card (EMMC), after booting, read the image file from EMMC, and then decompress, jump, and run.

However, under the existing technology, when creating an image file, the Linux kernel will only create the corresponding image file for the original data stored in the system memory, and ignore the original data stored in the non-system memory. In actual applications, the non-system memory The original data saved in may also record the key data of the boot operation, such as the image frame buffer (framebuffer) data, therefore, it will cause the TV to display abnormally after booting.

Summary of the invention

On the one hand, an embodiment of the present invention provides a method for generating an image file, including:

Based on the total amount of data to be saved in non-system memory, apply for the corresponding non-system memory mirror area in system memory;

For each non-system physical memory page to be processed, perform the following operations:

Map the physical address of the non-system memory physical memory page to the corresponding kernel virtual address;

Reading non-system memory raw data from the non-system memory physical memory page, and saving the non-system memory raw data and the corresponding physical address based on the kernel virtual address to the non-system memory mirror area;

Apply for the corresponding system memory mirror area in the system memory, and save the original data of the system memory and the corresponding physical address to be saved in the system memory mirror area;

Compress the saved original data of each non-system memory and the corresponding physical address, and save the saved original data of each system memory and the corresponding physical address, and generate a corresponding image file.

On the other hand, an embodiment of the present application provides a method for loading an image file, including:

After the AC is turned on, obtain the pre-stored image file and decompress it in the system memory.

For each physical memory page recorded in the decompressed image file, perform the following operations:

According to the metadata recorded in the decompressed image file, determine the physical address of the physical memory page;

When it is determined that the physical memory page is a non-system memory physical memory page according to the physical address of the physical memory page, the physical address of the non-system memory physical memory page is mapped to a corresponding kernel virtual address;

According to the kernel virtual address of the non-system memory physical memory page, read the corresponding non-system memory raw data from the decompressed image file, and according to the non-system memory physical memory page physical address, the non-system The original memory data is saved to a corresponding location in non-system memory.

On the other hand, an embodiment of the present application provides an intelligent device, including a processor and a memory;

The memory is used to store computer programs;

The processor executes the computer program to execute:

Reading non-system memory raw data from the non-system memory physical memory page, and saving the non-system memory raw data and the corresponding physical address based on the inner core virtual address to the non-system memory mirror area;

On the other hand, an embodiment of the present application provides an intelligent device, including a processor and a memory, where:

The memory is used to store computer programs;

The processor is configured to execute the computer program to execute:

After the AC boot, obtain the pre-stored image file and decompress it in the system memory;

On the other hand, an embodiment of the present application provides a storage medium that stores a program for implementing a method of generating an image file. When the program is executed by a processor, the following steps are performed:

Compress the original data and corresponding physical addresses of each non-system memory and the original data and corresponding physical addresses of each system memory to generate corresponding mirror files.

On the other hand, an embodiment of the present application provides a storage medium that stores a program for implementing a method of loading an image file. When the program is executed by a processor, the following steps are performed:

After the AC is turned on, obtain the pre-stored image file and decompress it in the system memory;

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the system memory architecture in physical memory under the prior art;

2 is a schematic diagram of a functional structure of a smart device in an embodiment of the present invention;

3 is a schematic diagram of a process of generating a mirror file by a smart device in an embodiment of the present invention;

4 is a schematic diagram of physical memory allocation in an embodiment of the present invention;

FIG. 5 is a schematic diagram comparing the contents of a mirror file in the prior art and the embodiment of the present invention;

6 is a schematic diagram of a process of loading a mirror file by a smart device in an embodiment of the present invention.

detailed description

Related technologies, smart devices based on Linux technology adopt a design model that is not related to the specific architecture at the DDR management level, and achieves good scalability. Specifically, the DDR of the smart device is divided into system memory and non-system memory. The system memory is a memory that the Linux kernel has permission to manage, while the non-system memory is memory that the Linux kernel has no right to manage.

Referring to FIG. 1, the system memory is composed of a three-level architecture of a memory node (Node), a memory zone (Zone), and a physical memory page (page).

Memory node, a method of describing physical memory in a computer system, a bus master device costs the same cost to access any memory unit located in the same memory node, and it costs the same to access memory units in any two different nodes The cost is different.

The memory area is located in the same memory node. There are mainly direct read memory area (ZONE_DMA), ordinary memory area (ZONE_NORMAL), and high-end memory area (ZONE_HIGHMEM).

Physical memory pages. System memory is usually managed in units of "pages". The size of a physical memory page is 4K bytes.

STD technology is similar to STR, and it is a method to speed up the startup of smart devices. The difference is that STD technology will save the image file used for recovery to EMMC, so that the image file will not be lost after AC power failure.

Specifically, the smart device collects the system operating state description information before standby. The system operating state description information includes at least: physical memory page usage state, processor operating state, external device operating state, etc.; then, the smart device will Make the obtained system operating state description information into a corresponding image file according to the set format and save it in EMMC; the next time the smart device performs AC boot, it will be read from EMMC in the bootloader stage before the kernel or system startup Image file, and then perform the recovery process to restore to the last standby state.

Exemplarily, suppose a smart device is configured with 1.5G of physical memory, where the size of ZONE_NORMAL is 295M, and the size of ZONE_HIGHMEM is 634M, that is, the system memory occupies 929M of physical memory, and the remaining 607M of physical memory is used as The non-system memory is reserved for other hardware modules of the main chip for special purposes, for example, 100M of physical memory is reserved for the frame module from the non-system memory for the display module.

Non-system memory is not within the scope of the Linux kernel's management authority, so when creating an image file, the smart device will not use data saved in non-system memory. However, during the STD boot process, some processes may need to use data saved in non-system memory. Because it is an AC boot, the initial value of all data in non-system memory before initialization is 0xff. Some of the above processes are abnormal. If some of the above processes are related to the display, it will cause the screen and white screen problems during the STD boot process.

In order to ensure the integrity of the image file and ensure that the smart device starts up smoothly and quickly, in the actual example of the present invention, the smart device using the Linux kernel selectively saves the specified important non-system memory and system memory during the image file process. Data to generate the corresponding image file.

The embodiments of the present invention will be further described in detail below with reference to the drawings.

Referring to FIG. 2, in the embodiment of the present invention, the smart device (eg, smart TV) includes at least a processor 20, physical memory 21 (eg, DDR), and memory 22 (eg, EMMC), where the processor 20 , Used to carry the Linux kernel, and perform related operations to generate an image file, the physical memory 21 is used to cache various data generated during the operation of the system, and the memory 22 is used to save the image file.

Based on the above smart device, referring to FIG. 3, in the embodiment of the present invention, the detailed process of the smart device generating the image file is as follows:

Step 300: Based on the preset configuration information, the smart device determines whether it is necessary to save the original data of non-system memory? If yes, go to step 301; otherwise, go to step 305.

Of course, if the default configuration of the smart device is to save the non-system memory original data, the smart device may directly perform the image file generation process from step 310 without performing a judgment operation.

Step 301: Based on the total amount of data that needs to be saved in the non-system memory, the smart device applies for the corresponding non-system memory mirror area in the system memory.

Specifically, in DDR, the physical memory is set in the form of physical memory pages. Therefore, the smart device needs to first determine the physical memory occupied by the total amount of non-system memory original data that needs to be saved in the non-system memory The total amount of pages, and then, based on the total amount of physical memory pages occupied by the total data amount of the original data of the non-system memory, apply for the total amount of physical memory pages of corresponding size in the system memory, also known as the non-system memory mirror area.

The above non-system memory mirror area can be located in ZONE_NORMAL or ZONE_HIGHMEM, depending on the idle state of the system memory at that time, as shown in Figure 4.

Step 302: The smart device maps the physical address of a non-system memory physical memory page to the corresponding kernel virtual address.

In actual applications, the addresses used in the Linux system are all virtual addresses. Taking the 32-bit system as an example, the Linux kernel will provide the same size virtual memory address space for each running process, which allows multiple processes to work simultaneously. Run without interfering with each other, the virtual address space range is 0-4G. Therefore, in order to allow the Lunix kernel carried by the processor 20 to access non-system memory, the ioremap function needs to be called to map the physical address of the non-system memory physical memory page to the kernel virtual address space to obtain the corresponding memory virtual address to facilitate the processor 20 to read and write.

Step 303: The smart device reads the non-system memory raw data from the one non-system memory physical memory page, and saves the non-system memory raw data and the corresponding physical address based on the kernel virtual address to the Non-system memory mirror area.

Specifically, referring to FIG. 5, in the embodiment of the present application, a non-system memory mirror area is added on the basis of the system memory mirror area. The non-system memory mirror area can be discontinuous in physical address. Specifically, it can be divided into a first area that stores non-system memory original data and a second area that stores non-system memory metadata. Among them, metadata (Metadata) ), also known as intermediary data, relay data, is data describing data (data about data), mainly describing information of data properties (property), used to support, for example, indicating storage location, historical data, resource search, file records And other functions.

In the embodiment of the present application, the metadata is used to record the physical address of the corresponding original data. Therefore, when step 303 is performed, the smart device saves the original data of the non-system memory saved in a physical memory page of the non-system memory to the non-system memory The first area in the mirror area (also stored in a system memory physical memory page, which will not be repeated here), and the corresponding physical address is saved in the form of metadata to the second area in the non-system memory mirror area.

The mapping relationship between the original data of the non-system memory and the corresponding physical addresses can be saved in the set mirror header area, as shown in Figure 5.

In an embodiment of the present application, since the image file is generated, the real-time data lossless compression (Lempel-Ziv-Oberhumer, LZO) format is usually used for compression. Therefore, it is necessary to distinguish between non-system memory metadata and system memory metadata Open, and distinguish the non-system memory raw data from the system memory raw data, and the storage location of the non-system memory metadata needs to be placed in front of the non-system memory raw data, that is, between the first area and the mirror head area The distance is greater than the distance between the second area and the mirror head area. Similarly, the storage location of the system memory metadata must be placed in front of the original data in the system memory. In this way, after the mirror file is generated, the mirror file When decompressing, it will not cause data confusion, and will not cause the metadata to be unmatched with the original data, causing boot failure.

Step 304: The smart device determines whether all non-system memory physical memory pages have been processed? If yes, go to step 305; otherwise, go to step 302.

Step 305: The smart device applies the corresponding system memory mirror area in the system memory based on the total amount of data to be saved in the system memory.

Smart devices store the original data in the system memory in the system memory in a similar way to the original data in the non-system memory. The difference is that when reading the original data in the system memory, there is no need to map the physical address to the virtual address of the memory. Because the original storage location of the original data of the system memory is also located in the system memory, and the system memory belongs to the memory area that the Linux kernel has permission to manage, so the smart device can clearly know the memory virtual address of the original storage location of the original data of the system memory.

Step 306: The smart device copies the original data of the system memory and the corresponding physical address to be saved in the physical memory pages of each system memory to the system memory mirror area.

Similarly, smart devices also need to use page-by-page processing to separately copy the original data of the system memory saved in the physical memory page of each page of system memory to be processed to the third area in the system memory mirror area, and copy the above system The physical address corresponding to the original memory data is copied to the fourth area in the mirror area of the system memory, and, in an embodiment of the present application, as shown in FIG. 5, the distance between the third area and the mirror head area Is larger than the distance between the fourth area and the mirror head area.

Step 307: The smart device saves the specified boot information in the image header area.

Specifically, the smart device saves the mapping relationship between each non-system memory original data in the non-system memory mirror area and the corresponding physical address in the mirror header area; and, saves each system memory original data in the system memory mirror area and the corresponding The mapping relationship between the physical addresses.

Step 308: The smart device compresses various types of data stored in the system memory mirror area and the non-system memory mirror area according to the set format, generates a corresponding mirror file, and saves it in the EMMC.

At this point, the image file has been generated, and the smart device can save the image file in the EMMC. When the smart device is shut down and restarted, the system recovery can be performed based on the image file.

Based on the above embodiment, as shown in FIG. 6, in the embodiment of the present invention, the detailed process of loading the mirror file by the smart device is as follows:

Step 600: Start the AC after the smart device is turned off

Step 601: The smart device reads the pre-stored image file from the EMMC, saves it to the DDR and decompresses it.

Specifically, the smart device first decompresses the compressed image file in the system memory, and then reads the metadata therein. The metadata stores the physical address of the original storage location of the non-system memory original data and the system memory original data. .

Step 602: The smart device reads the metadata of one physical memory page from the decompressed image file, and determines the physical address of the one physical memory page based on the metadata.

Step 603: The intelligent device determines whether the physical address of the one physical memory page belongs to non-system memory? If yes, go to step 604; otherwise, go to step 606.

Step 604: The smart device determines that the physical memory page is a non-system memory physical memory page, and maps the physical address of the non-system memory physical memory page to a corresponding kernel virtual address.

Similarly, the smart device needs to use the ioremap function to map the physical address of the physical memory page to the corresponding kernel virtual address.

Step 605: The smart device reads the corresponding non-system memory raw data from the decompressed image file according to the kernel virtual address of the non-system memory physical memory page, and according to the physical address of the non-system memory physical memory page, The original data in the non-system memory is saved to a corresponding location in the non-system memory, and then step 607 is executed.

In this way, the smart device restores the non-system memory original data in the image file to the original storage device in the system memory.

Step 606: The smart device determines that the processed memory page is a non-system memory physical memory, and reads the corresponding system memory raw data from the decompressed image file according to the kernel virtual address of the system memory physical memory page, and according to The physical address of the physical memory page of the system memory saves the original data of the system memory to a corresponding location in the system memory.

In this way, the smart device restores the original data of the system memory in the image file to the original storage device in the system memory.

Step 607: The smart device determines whether all physical memory pages in the image file have been processed? If yes, go to step 608; otherwise, go back to step 602.

The smart device will restore the non-system memory original data or system memory original data corresponding to each physical memory page page by page from the image file in a certain order, until all data is restored.

Step 607: The smart device determines that the image file is loaded and restores the system to the image file indication state.

At this point, the image file has been loaded, and the smart device can restore the system to the state indicated by the last image file saved.

Based on the above embodiment, referring to FIG. 2, in the embodiment of the present invention, a smart device (eg, a smart TV) includes at least a processor 20, a physical memory 21, and a memory 22. The physical memory 21 is divided into non-system memory and system memory. among them,

In one embodiment,

The processor 20 is used to apply for a corresponding non-system memory mirror area in the system memory based on the total amount of data that needs to be saved in the non-system memory;

Reading raw data from non-system memory from the non-system memory physical memory page, and based on the kernel

Virtual address, save the original data of the non-system memory and the corresponding physical address to the mirror area of the non-system memory;

In an embodiment of the present application, based on the total amount of data that needs to be saved in the non-system memory, before applying for the corresponding non-system memory mirror area in the system memory, the processor 20 is further used to:

According to the preset configuration information, it is determined that the data saved in the non-system memory needs to be used to generate the image file.

In an implementation manner of the present application, when the original data of the non-system memory and the corresponding physical address are stored in the non-system memory mirror area, the processor 20 is used to:

Storing the non-system memory original data in the first area of the non-system memory mirror area;

Storing the physical address corresponding to the original data in the non-system memory in the second area of the non-system memory mirror area in the form of metadata;

Wherein, the distance between the first area and the mirror head area set in the mirror area of the system memory is greater than the distance between the second area and the mirror head area.

In one embodiment of the present application, the processor 20 is used to pre-compress the saved original data of each non-system memory and the corresponding physical address, and the saved original data of each system memory and the corresponding physical address in a preset format Further use:

The mapping relationship between the original data of each non-system memory and the corresponding physical address in the non-system memory mirror area is stored in the set mirror header area; and,

The mapping relationship between the original data of each system memory and the corresponding physical address in the system memory mirror area is stored in the mirror head area.

In an embodiment of the present application, the processor 20 is further used to:

Save the image file to a specified location in memory.

In yet another embodiment,

After the AC is turned on, the processor 20 is used to,

Obtain the pre-stored image file and decompress it in the system memory;

When it is determined that the physical memory page is a system memory physical memory page according to the physical address of the physical memory page, the corresponding system memory is read from the decompressed image file according to the kernel virtual address of the system memory physical memory page Raw data;

According to the physical address of the physical memory page of the system memory, the original data of the system memory is saved to a corresponding location in the system memory.

Based on the same inventive concept, in one embodiment, a storage medium is provided, which stores a program for implementing a method of generating an image file. When the program is executed by the processor 20, the following steps are performed:

Based on the same inventive concept, in one embodiment, a storage medium is provided that stores a program for implementing a method for loading an image file, and when the program is executed by the processor 20, the following steps are performed:

Obtain the pre-stored image file and decompress it in the system memory;

In summary, in the embodiment of the present invention, the smart device maps the non-system memory raw data to the kernel virtual space for processing and storage according to the physical address, and compresses the system memory raw data to generate the corresponding image file, so that it can In the image file, comprehensively record all important data required for system recovery, thereby ensuring the integrity of the image file, and thereby avoiding the problem of flower screen and white screen due to the loss of important data when the smart device performs system recovery based on the image file. Ensure the smooth and quick boot of the smart device.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and/or block in the flowchart and/or block diagram and a combination of the flow and/or block in the flowchart and/or block diagram may be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing device to produce a machine that enables the generation of instructions executed by the processor of the computer or other programmable data processing device An apparatus for realizing the functions specified in one block or multiple blocks of one flow or multiple flows of a flowchart and/or one block or multiple blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions The device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, which is executed on the computer or other programmable device The instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. In this way, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention is also intended to include these modifications and variations.

Claims

A method for generating an image file is characterized by including:

Based on the total amount of data to be saved in non-system memory, apply for the corresponding non-system memory mirror area in system memory;

For each non-system physical memory page to be processed, perform the following operations:

Map the physical address of the non-system memory physical memory page to the corresponding kernel virtual address;

Reading non-system memory raw data from the non-system memory physical memory page, and saving the non-system memory raw data and the corresponding physical address based on the kernel virtual address to the non-system memory mirror area;

Apply for the corresponding system memory mirror area in the system memory, and save the original data of the system memory and the corresponding physical address to be saved in the system memory mirror area;

Compress the saved original data of each non-system memory and the corresponding physical address, and save the saved original data of each system memory and the corresponding physical address, and generate a corresponding image file.
The method according to claim 1, characterized in that before applying for the corresponding non-system memory mirrored area in the system memory based on the total amount of data to be saved in the non-system memory, the method further comprises:

According to the preset configuration information, it is determined that the data saved in the non-system memory needs to be used to generate the image file.
The method according to claim 1, wherein the storing the original data of the non-system memory and the corresponding physical address in the non-system memory mirror area includes:

Storing the non-system memory original data in the first area of the non-system memory mirror area;

Storing the physical address corresponding to the original data in the non-system memory in the second area of the non-system memory mirror area in the form of metadata;

Wherein, the distance between the first area and the mirror head area set in the mirror area of the system memory is greater than the distance between the second area and the mirror head area.
The method according to claim 3, characterized in that before storing the original data and corresponding physical addresses of each non-system memory and the original data and corresponding physical addresses of each saved system memory in a preset format, Further includes:

The mapping relationship between the original data of each non-system memory and the corresponding physical address in the non-system memory mirror area is stored in the set mirror header area; and,

The mapping relationship between the original data of each system memory and the corresponding physical address in the system memory mirror area is stored in the mirror head area.
The method according to any one of claims 1-4, further comprising:

Save the image file to a specified location in memory.
A method for loading an image file is characterized by including:

After the AC boot, obtain the pre-stored image file and decompress it in the system memory

For each physical memory page recorded in the decompressed image file, perform the following operations:

According to the metadata recorded in the decompressed image file, determine the physical address of the physical memory page;

According to the physical address of the physical memory page, when it is determined that the physical memory page is a non-system memory physical memory page, the physical address of the non-system memory physical memory page is mapped to a corresponding kernel virtual address;

According to the kernel virtual address of the non-system memory physical memory page, read the corresponding non-system memory raw data from the decompressed image file, and according to the non-system memory physical memory page physical address, the non-system The original memory data is saved to a corresponding location in non-system memory.
The method of claim 6, further comprising:

When it is determined that the physical memory page is a system memory physical memory page according to the physical address of the physical memory page, the corresponding system memory is read from the decompressed image file according to the kernel virtual address of the system memory physical memory page Raw data;

According to the physical address of the physical memory page of the system memory, the original data of the system memory is saved to a corresponding location in the system memory.
An intelligent device, characterized by comprising a processor and a memory, wherein:

The memory is used to store computer instructions;

The processor is configured to execute the computer instructions to execute:

Based on the total amount of data to be saved in non-system memory, apply for the corresponding non-system memory mirror area in system memory;

For each non-system physical memory page to be processed, perform the following operations:

Map the physical address of the non-system memory physical memory page to the corresponding kernel virtual address;

Reading non-system memory raw data from the non-system memory physical memory page, and saving the non-system memory raw data and the corresponding physical address based on the kernel virtual address to the non-system memory mirror area;

Apply for the corresponding system memory mirror area in the system memory, and save the original data of the system memory and the corresponding physical address to be saved in the system memory mirror area;

Compress the saved original data of each non-system memory and the corresponding physical address, and save the saved original data of each system memory and the corresponding physical address, and generate a corresponding image file.
An intelligent device characterized by at least including a processor and a memory, wherein:

The memory is used to store computer instructions;

The processor is configured to execute the computer instructions to execute:

After the AC boot, obtain the pre-stored image file and decompress it in the system memory;

For each physical memory page recorded in the decompressed image file, perform the following operations:

According to the metadata recorded in the decompressed image file, determine the physical address of the physical memory page;

When it is determined that the physical memory page is a non-system memory physical memory page according to the physical address of the physical memory page, the physical address of the non-system memory physical memory page is mapped to a corresponding kernel virtual address;

According to the kernel virtual address of the non-system memory physical memory page, read the corresponding non-system memory raw data from the decompressed image file, and according to the non-system memory physical memory page physical address, the non-system The original memory data is saved to a corresponding location in non-system memory.
A storage medium characterized by storing a program for implementing a method of generating an image file, and when the program is executed by a processor, the following steps are performed:

Based on the total amount of data to be saved in non-system memory, apply for the corresponding non-system memory mirror area in system memory;

For each non-system physical memory page to be processed, perform the following operations:

Map the physical address of the non-system memory physical memory page to the corresponding kernel virtual address;

Reading non-system memory raw data from the non-system memory physical memory page, and saving the non-system memory raw data and the corresponding physical address based on the kernel virtual address to the non-system memory mirror area;

Apply for the corresponding system memory mirror area in the system memory, and save the original data of the system memory and the corresponding physical address to be saved in the system memory mirror area;

Compress the original data and corresponding physical addresses of each non-system memory and the original data and corresponding physical addresses of each system memory to generate corresponding mirror files.
A storage medium characterized by storing a program for implementing a method of loading an image file, and when the program is executed by a processor, the following steps are performed:

Obtain the pre-stored image file and decompress it in the system memory;

For each physical memory page recorded in the decompressed image file, perform the following operations:

According to the metadata recorded in the decompressed image file, determine the physical address of the physical memory page;

When it is determined that the physical memory page is a non-system memory physical memory page according to the physical address of the physical memory page, the physical address of the non-system memory physical memory page is mapped to a corresponding kernel virtual address;

According to the kernel virtual address of the non-system memory physical memory page, read the corresponding non-system memory raw data from the decompressed image file, and according to the non-system memory physical memory page physical address, the non-system The original memory data is saved to a corresponding location in non-system memory.