current process

Kernel space and user space are two working modes of the modern operating system. The kernel module runs in the kernel space, while the user-Mode ApplicationProgramRun in user space. They represent different levels and have different access

# Define Wake_up_interruptible(X) _ wake_up (x, task_interruptible, 1, null) Void fastcall_ Wake_up(Wait_queue_head_t * Q,Unsigned int mode,Int nr_exclusive,Void * key){Unsigned long flags;Spin_lock_irqsave (& Q-> lock, flags );_ Wake_up_common(Q,

inter-process communication -- SignalTenet: The learning of technology is limited and the spirit of sharing is limitless.First, Signals and interrupts1. Basic Signal Concepts(1) Send signal: Generate signal, there are many ways to send a signal "one

1, why process scheduling is requiredFirst, we need to make it clear that process scheduling is the process of scheduling a task_running state (see "Analysis of Linux process status"). If the process is not executable (sleeping or otherwise), it has

Transferred from: http://blog.csdn.net/lizuobin2/article/details/51791863This article was reproduced from: http://www.cnblogs.com/Anker/p/3269106.html1. PrefaceRecent knowledge of the Linux kernel often sees user space and kernel space and process

How the Linux kernel analyzes how the operating system works20122137 Sha Yu JiOriginal works reproduced please indicate the sourceLinux kernel Analysis MOOC course http://mooc.study.163.com/course/USTC-10000290001. Content DescriptionThe inline

PS. He Bong Original works reproduced please specify the source "Linux kernel Analysis" MOOC course http://mooc.study.163.com/course/USTC-10000290001.mykernelExperimental Guidance (how the operating system works)Use the lab building virtual machine

1. With regard to process 1.1. Definition of the processProcess: The basic unit that can run independently and be allocated as a resource in a system, which consists of a set of machine instructions, data and stacks, and is an active entity that can

Original address:http://cchxm1978.blog.163.com/blog/static/35428253201092910491682/Pretty good article, read the Post collection, Dochebeau Master share!Start---------------------------------body--------------------------------- To implement

1, Nt.pyos.chdir () modify the current working directory to the specified directory Os.chmod () modify the access rights of a file Os.chown () modify the owner and owner group of one directory to another number, the owner group Os.chroot () modifies

I. Overview: Daemons, also known as daemon Processes (Daemon), are a special process that runs in the background. It is independent of the control terminal and periodically performs some sort of task or waits to handle certain occurrences. The

From the previous articles in my blog, it has been emphasized that the operating system is a multi-process collaborative operation to achieve the logical purpose of the entire operating system, to achieve an artificially manipulated system:The

First, in order to understand the signal, start from our most familiar with the scene: 1. User input command to start a foreground process under the shell. 2. The user presses the CTRL-C, this keyboard input produces a hardware interrupt. 3. If

The key abstraction that a process provides to an application: a separate logical control flow that provides an illusion as if our program exclusively uses the processor . a private address space that provides an illusion as if our program

61615603XV6 Process Switch-swtch functionProcess switching because of the need to save the current process register state information, but also the new process record register state information loaded into the register, so it involves a lot of stack

1Introduction to Linux operating systemLinux systems typically have 4 main parts: The kernel, the shell, the file system, and the application. The kernel, shell, and file systems together form a basic operating system structure that allows users to

Virtual memoryVirtual memory is a perfect interaction between hardware exceptions, hardware address translation, main memory, disk files, and kernel software, which provides a large, consistent, and private address space for each process. With a

Analysis of Windows access permission check mechanism Author: DanielKing0x00 Introduction In the operating system, when we mention security, it means that some resources need to be protected. In the Windows operating system, most of these resources

Multi-process scheduling is essential for the operating system. Some people say that process scheduling is the most important part of the operating system. I think this is an absolute saying, just as many people say that the efficiency of a function

This article mainly introduces how to use multi-process programming functions in PHP using examples, including processing zombie processes! You can refer to a set of process control functions in PHP (enable-pcntl and posix extensions are required