Kernel-level thread and user-level thread, kernel-level thread user
When I wrote this blog these two days, I reviewed the operating system materials and encountered a problem that I did not understand before, that is, about kernel-level threads and user-level threads. After reading some documents, I will share my personal profile.
Threads have been implemented in
Date
Kernel version
Architecture
author
GitHub
CSDN
2016-06-02
Linux-4.5
X86 Arm
Gatieme
Linuxdevicedrivers
Linux process management and scheduling--a description of the process
Why kernel threads need kernel threadsThe Linux kernel ca
User thread and kernel thread, user thread kernel thread
1. kernel-level thread: switch is controlled by the kernel. When the thread is switched, the user State is converted to the kernel state. After switching, the user State should be returned from the
Recently, some netizens have repeatedly mentioned an open source project kernel-win32 designed to move wineserver into the kernel; some questions and themselves, hoping to make some analysis and explanation of its code, also asked about the relationship between compatible kernels and this project. So from the beginning of this talk about kernel-win32.First, compa
PHP kernel decryption series: Execution Process of zend_execute, kernel zend_execute
PHP kernel decryption series: Execution Process of zend_execute
The interpreter engine finally executes the op function zend_execute. In fact, zend_execute is a function pointer. During engine initialization, zend_execute points to execute by default, this execute is defined
I found that I have always been a person to learn about. I don't know whether my mind is impetuous or I can't be so knowledgeable. Fortunately, I am a good thinker. Now I have come up with a new idea to differentiate these two concepts. It will not be confused. After understanding the following issues, it is more conducive to understanding the Linux architecture.
In general, we will think that all modules that can serve processes should be placed in the kern
Compiling the Linux kernel is the basic function of kernel development, and if we add kernel functionality by directly modifying the Linux kernel code, the modified kernel code must be recompiled to generate a new image file and then load the image file to enable the new
What changes does Google make in the kernel?A company compared the standard kernel and Android kernel, and found that Google modified 75 files and added 88 files. The company also annotated these modified and new files.
Goldfish -- 44 files
Kernel/ARCH/ARM/Mach-goldfishKernel/include/ASM-arm/arch-goldfish
The android s
The previous three different address spaces are briefly described, followed by a focus on the mapping of the linear address space to the physical address space.Let's start with the 32-bit system first.In a 32-bit system, the size of the linear address space is 2^32, which is 4GB. Kernel generally divides the linear address space into two parts at a rate of 3:1:
0~3GB User address space
3GB~4GB the ker
Linux Kernel reduction and root file system customization (1) -------- Linux kernel reductionDirectory:
I. kernel Compilation
Ii. root file system Customization
Iii. kernel options
I. kernel Compilation
1. Preparations
(1) sort out the hardware, file system types, and net
Linux kernel:Kernel design Genre:Single core design, but fully learn the advantages of micro-kernel system design, for the kernel introduced a modular mechanism, the core height of modularity;After the kernel is modularized, some of the most basic and important content is compiled into kernel core, while other function
For more information, see "learn while doing" by Zhejiang University Press.Chapter 9 Linux kernel compilation experiment objective: to learn how to re-compile the Linux kernel and understand the differences between the Linux standard kernel and the released version. experiment content: compiling the Linux kernel is an
How can we compile the kernel module before? Describes how to compile modules. Here, we will continue to introduce how to compile kernel modules in the 2.6 kernel. The method for compiling the kernel module is slightly different from that for compiling general applications. makefile exists in the directory of the
Sleep a good sleep, very late, for a long time not so comfortable, today's task is not heavy, so the pressure is not big, oh, the weather is really cold, but the laboratory has air conditioning, I still like to stay here, there is a different feeling, after writing so many days, I do not understand the page gradually enlightened, And also made some friends, really very happy ah. Today will introduce you to add code to the kernel, take a look at it ~Fi
Introduction to the Linux kernel module the overall structure of the Linux kernel is already very large, and it contains many components. How can we include all the required parts in the kernel?One way is to compile all required functions into the Linux kernel. This will cause two problems. One is that the generated
Linux brain "kernel" about itWhat is a kernelKernel (kernel) is the core of the operating system, the equivalent of the human brain, the control of all hardware devices, that is, you want the computer to help you do all the work, it needs to be done through the kernel's help, of course, if you want to implement a function kernel is not provided, then you must add
Ubuntu kernel compilation tutorial-compile the Linux4.5.0 Kernel
Tutorial environment: Ubnuntu 64-bit (14.04 recommended) + Xshell
The Linux ECs is very useful for compiling the kernel. This article describes the most basic kernel compilation methods. For convenience, all operations are performed under the root user.
I
Upgrade Ubuntu 10.04 with 2.6.32 kernel to 3.0 kernel graphic tutorial, 10.042.6.32
1. Complete the following practical work and screenshot the practice steps: 1) download and install the Virtual Machine VMWare Workstation; 2) install Linux2.x on the virtual machine; 3) Compile the Linux 2. upgrade x Kernel to Linux 3.x.
1) install VMware Workstation 11.1.0.
Original: 10 days the first day of learning the Linux kernel---kernel exploration tool classWinter vacation idle down, can enjoy doing their favorite things, concentrate on the lab in the dry up, because when the sophomore contact Linux, just about the kernel is really not understand, so 10 days still hope to be able to add the Linux
Article title: Linux 2.4 kernel-kernel improvement description. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
1. Module Subsystem, Unified Device Model, and PnP support Module Subsystem have undergone major changes.2. improv
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.