WO2016101519A1

WO2016101519A1 - Method and device for realizing restart of operating system

Info

Publication number: WO2016101519A1
Application number: PCT/CN2015/079406
Authority: WO
Inventors: 陈彬
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-26
Filing date: 2015-05-20
Publication date: 2016-06-30
Also published as: CN105786547A

Abstract

A method and device for realizing restart of an operating system, which are implemented based on software. The method comprises: reading a kernel image file and a root file system file from a pre-set operating system file, and reading a device parameter description file from the current operating system (101); shutting down an external interface of a computing device where the operating system is located, as well as a management device for resetting the computing device (102); and restarting the current operating system, saving the kernel image file in a pre-set fixed position of a memory, saving the root file system file and the device parameter description file in a first start position and a second start position of an applied memory, and loading a kernel from the fixed position (103).

Description

Method and device for realizing operating system restart

Technical field

The embodiments of the present invention relate to operating system technologies, and in particular, to a method and apparatus for implementing an operating system restart.

Background technique

It is well known that computing devices with complex functions, such as server operating systems such as the Linux operating system, typically have a reboot time of five minutes, such as five minutes or longer. Usually, the restart process of the operating system is divided into two phases: the boot phase and the kernel phase. Among them, in the booting phase, devices such as a memory controller, a storage device, and a bus bridge, which are related to booting an operating system, are mainly detected by a firmware such as a boot chip, and then the kernel of the operating system is loaded and enters the kernel stage. In the kernel phase, the kernel sets up the required data structures, detects all devices on the operating system, loads the drivers needed by the device and initializes the device, and finally performs user-level initialization.

For computing devices used in critical applications, longer reboot times reduce availability, affecting the user experience of computing devices, and sometimes even significant economic losses. At present, reducing the restart time of the operating system has received more and more attention. One way to reduce the restart time of the operating system is to shorten the operating system restart time by quickly recovering important data stored in the operating system by the operating system during the kernel phase. Another method is to shorten the operating system restart time by skipping the detection device and directly loading the kernel during the boot phase.

The above method for reducing the restart time of the operating system shortens the restart time of the operating system in different ways. However, the complexity of the operating system, such as the complexity of the types of devices managed by the operating system, causes the operating system to restart. For some areas, such as the financial sector, it is still long or even unacceptable. Therefore, the market needs to further reduce the restart time of the operating system.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims. (The following is a brief summary of subject matter that is described in greater detail herein. This summary is not intended to be limiting as to the scope of the claims.)

An embodiment of the present invention provides a method for implementing an operating system restart, including:

Read the kernel image file and the root file system file from the preset operating system file, and read the device parameter description file from the current operating system;

Shutting down an external interface of the computing device where the operating system is located, and a management device for resetting the computing device;

Restart the current operating system, save the kernel image file in a preset fixed position in the memory, and save the root file system file and the device parameter description file in the first starting position and the second starting position of the applied memory, and Load the kernel from a fixed location.

If the device parameter description file fails to be read from the current operating system, the method further includes: reading the device parameter description file from the operating system file.

Optionally, after the restarting the current operating system, before saving the kernel image file in a preset fixed position of the memory, the method further includes: initializing a loading environment required to load the kernel.

The loading environment required to initialize the loading kernel includes at least: prohibiting the operating system from responding to the interrupt; and clearing the cache and the fast table of the computing device.

The loading the kernel includes: loading the kernel with at least the first starting position and the second starting position as parameters.

The embodiment of the invention further discloses an apparatus for implementing an operating system restart, which comprises at least an analysis unit and a preparation unit, wherein

The parsing unit is configured to read the kernel image file and the root file system file from the preset operating system file, and read the device parameter description file from the current operating system;

The preparation unit includes a shutdown module, a restart module, a save module, and a load module, wherein

Turning off the module, setting the external interface of the computing device where the operating system is located, and the management device for resetting the computing device;

Restart the module and set it to restart the current operating system.

Save the module, set to restart the current operating system, save the kernel image file in a preset fixed location in the memory, and save the root file system file and device parameter description file in the application. The first starting position and the second starting position of the memory;

Load the module, set to load the kernel from a fixed location.

The parsing module is further configured to: when the device parameter description file fails to be read from the current operating system, read the device parameter description file from the operating system file.

The external interface includes at least a network interface.

The management device is a watchdog chip.

Optionally, the preparation unit further includes an initialization module, configured to initialize a loading environment required to load the kernel.

The initialization module is specifically configured to: prohibit the operating system from responding to the interrupt; and clear the cache and the fast table of the computing device.

The loading module is specifically configured to: load the kernel by using at least the first starting position and the second starting position as parameters.

Compared with the prior art, the technical solution provided by the embodiment of the present invention reads a kernel image file and a root file system file from a preset operating system file, and reads a device parameter description file from a current operating system; The external interface of the computing device and the management device for resetting the computing device; restart the current operating system, save the kernel image file in a preset fixed location in the memory, and save the root file system file and the device parameter description file in the The first starting position and the second starting position of the applied memory are loaded, and the kernel is loaded from the fixed position. From the embodiment of the present invention, on the one hand, the process of the firmware detecting device in the booting phase is omitted; on the other hand, the reading efficiency is improved by simultaneously reading the required files from the operating system file and the current operating system; Moreover, by loading the kernel from a fixed location in memory, the efficiency of loading the kernel is improved. It can be seen that the embodiment of the present invention improves the restarting efficiency of the operating system from various aspects, and greatly reduces the restart time of the operating system, thereby better satisfying the market demand.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

Other aspects will be apparent upon reading and understanding the drawings and detailed description. (Other aspects will be appreciated upon reading and understanding the attached figures and Detailed description.)

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

FIG. 1 is a flowchart of a method for implementing an operating system restart according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a device for implementing an operating system restart according to an embodiment of the present invention.

Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

FIG. 1 is a flowchart of a method for implementing an operating system restart according to the present invention. As shown in FIG. 1 , the method includes:

Step 101: Read the kernel image file and the root file system file from the preset operating system file, and read the device parameter description file from the current operating system.

Take the Linux operating system as an example. The operating system file can be a software package of the Linux operating system; the kernel image file, such as a Linux kernel image file, is used to boot the kernel; the root file system file, such as the root file system of the Linux operating system, is used to boot The root file system is loaded in the kernel; the device parameter description file, such as the device parameter description file of the Linux operating system, is used to initialize the device in the boot kernel.

The specific implementation of reading the kernel image file and the root file system file from the operating system file in step 101 is a common technical means for those skilled in the art, and is not intended to limit the scope of protection of the present invention, and details are not described herein again.

Generally, the operating system saves the device parameter description file in the memory. Therefore, the specific implementation of reading the device parameter description file from the current operating system includes: obtaining the starting position of the memory saving device parameter description file, according to the obtained starting position. Read the device parameter description file.

The specific implementation of how to obtain the starting position of the memory saving device parameter description file and the reading of the device parameter description file according to the starting position is a common technical means by those skilled in the art, and is not used to limit the protection scope of the present invention. I won't go into details here.

further,

If the device parameter description file fails to be read from the current operating system, step 101 further includes: reading the device parameter description file from the operating system file. In this way, the current operating system does not save the device parameter description file to the memory. For example, if the device parameter description file fails to be read from the current operating system, the device parameter description file can also be read from the operating system file. Thereby further improving the stability of the method of the invention.

Step 102: Shut down an external interface of the computing device where the operating system is located, and a management device for resetting the computing device.

The specific implementation of how to close the external interface and the management device is a common technical means for those skilled in the art, and is not intended to limit the scope of protection of the present invention, and details are not described herein.

In step 102, the external interface includes at least a network interface, and may also include an external interface such as a Bluetooth interface. Taking the network interface as an example, the network interface is closed to avoid the information received from the network interface during the restart, such as the network packet interference restart process, thereby improving the stability of the embodiment of the present invention.

In one embodiment of the invention, the management device is a watchdog chip. In this way, the watchdog chip reset computing device is avoided, thereby preventing the firmware from being activated and detecting the device.

Step 103: Restart the current operating system, save the kernel image file in a preset fixed position in the memory, and save the root file system file and the device parameter description file in the first starting position and the second starting position of the requested memory. And load the kernel from a fixed location.

The specific implementation of restarting the operating system belongs to the technical means of the person skilled in the art, and is not used to limit the scope of protection of the present invention, and details are not described herein again.

Taking the operating system as the Linux operating system as an example, the memory in this step refers specifically to the kernel state fixed memory, that is, the memory space dedicated to storing the information specified by the kernel.

The specific implementation of how to apply for the starting position of the memory and the loading of the kernel from the fixed location is a common technical means for those skilled in the art, and is not intended to limit the scope of protection of the present invention, and details are not described herein.

It should be noted that, after the embodiment of the present invention, the loaded kernel controls the computing device, so that the restart process enters the kernel phase.

After the current operating system is restarted in step 103, before the kernel image file is saved in a preset fixed position in the memory in step 103, the method further includes: initializing a loading environment required to load the kernel.

The loading environment required to initialize the loading kernel includes at least: prohibiting the operating system from responding to the interrupt; and clearing the cache and the fast table of the computing device. Here, the cache is a cache in a central processing unit (CPU) in the computing device; the fast table is a cache in a memory management unit (MMU) in the computing device. In this way, the data generated by the kernel before the restart is prevented from affecting the kernel after the restart, and the computing device is controlled, thereby ensuring the stability of the embodiment of the present invention. The specific technical implementation of the present invention is not limited to the scope of the present invention.

The loading of the kernel in step 103 includes: loading the kernel with at least a first starting position and a second starting position as parameters. Among them, the parameters of the loading kernel also include the kernel's command line parameters such as the default print level of the kernel log.

2 is a schematic structural diagram of a device for implementing an operating system restart according to an embodiment of the present invention, which includes at least an analysis unit and a preparation unit, where

The module is turned off, set to shut down the external interface of the computing device where the operating system is located, and the management device used to reset the computing device. Here, the external interface includes at least a network interface; the management device is a watchdog chip.

Restart the module and set it to restart the current operating system.

The save module is set to save the kernel image file in a preset fixed position in the memory, and save the root file system file and the device parameter description file in the first start position and the second start position of the requested memory.

Load the module, set to load the kernel from a fixed location.

After the device provided by the embodiment of the present invention runs, the loaded kernel controls the computing device, so that the restart process enters the kernel phase.

Further, the parsing module is further configured to: when the device parameter description file fails to be read from the current operating system, read the device parameter description file from the operating system file.

The preparation unit also includes an initialization module that is set to initialize the loading environment required to enter the kernel phase. specifically,

The initialization module is specifically configured to: disable the operating system from responding to the interrupt; and, to clear the cache and the fast table of the computing device.

The loading module is specifically configured to load the kernel by using at least a first starting position and a second starting position as parameters.

Industrial applicability

The method and device for implementing an operating system restart according to an embodiment of the present invention are implemented by using a software implementation, reading a kernel image file and a root file system file from a preset operating system file, and reading from a current operating system. Device parameter description file; close the external interface of the computing device where the operating system is located, and the management device for resetting the computing device; restart the current operating system, save the kernel image file in a preset fixed location in the memory, and copy the root file system file And the device parameter description file is saved in the first start position and the second start position of the requested memory, and the kernel is loaded from the fixed position. The technical solution provided by the embodiment of the invention reduces the restart time of the operating system, thereby better satisfying the market demand.

Claims

A method for implementing an operating system restart, which includes:

Read the kernel image file and the root file system file from the preset operating system file, and read the device parameter description file from the current operating system;

Shutting down an external interface of the computing device where the operating system is located, and a management device for resetting the computing device;

Restart the current operating system, save the kernel image file in a preset fixed position in the memory, save the root file system file and the device parameter description file in the first starting position and the second starting position of the requested memory, and fix it from the fixed Load the kernel in the location.
The method of claim 1, wherein if the reading of the device parameter description file fails, the method further comprises: reading the device parameter description file from the operating system file.
The method according to claim 1 or 2, wherein after the restarting the current operating system, before saving the kernel image file in a preset fixed position of the memory, the method further comprises: initializing the loading of the kernel The loading environment.
The method of claim 3, wherein said initializing a load environment required to load the kernel comprises at least: disabling said operating system from responding to an interrupt; and emptying said computing device's cache and fast table.
The method according to claim 1 or 2, wherein the loading of the kernel comprises: loading the kernel with at least the first starting position and the second starting position as parameters.
An apparatus for implementing an operating system restart, which includes at least a parsing unit and a preparing unit, wherein

The parsing unit is configured to read the kernel image file and the root file system file from the preset operating system file, and read the device parameter description file from the current operating system;

The preparation unit includes a shutdown module, a restart module, a save module, and a load module, wherein

Turning off the module, setting the external interface of the computing device where the operating system is located, and the management device for resetting the computing device;

Restart the module and set it to restart the current operating system.

Save the module, set to restart the current operating system, save the kernel image file in a preset fixed position in the memory, and save the root file system file and the device parameter description file in the first starting position of the requested memory and the second Starting position

Load the module, set to load the kernel from a fixed location.
The apparatus according to claim 6, wherein the parsing module is further configured to: read the device parameter description from the operating system file when the device parameter description file fails to be read from a current operating system file.
The apparatus of claim 6 or 7, wherein the external interface comprises at least a network interface.
The apparatus according to claim 6 or 7, wherein said management device is a watchdog chip.
The apparatus according to claim 6 or 7, wherein said preparation unit further comprises an initialization module arranged to initialize a loading environment required to load the kernel.
The apparatus of claim 10, wherein the initialization module is specifically configured to: disable the operating system from responding to an interrupt; and clear the cache and fast table of the computing device.
The apparatus according to claim 6 or 7, wherein the loading module is specifically configured to load the kernel at least with the first starting position and the second starting position as parameters.