unix kernel source code

= cond->__data.__total_seq; cond->__data.__woken_seq = cond->__data.__total_seq; Cond->__data.__futex = (unsigned int) cond->__data.__total_seq * 2; int futex_val = cond->__data.__futex; /* Signal that a broadcast happened. */ ++cond->__data.__broadcast_seq ; /* We are done. */Lll_unlock (Cond->__data.__lock, pshared);/* Don't use the requeue for pshared Condvars. */if (Cond->__data.__mutex = = (void *) ~0l)Goto Wake_all;/* Wake everybody. */pthread_mutex_t *mut = (pthread_mutex_t *) c

last_component;while (*++name = = '/'); if (!*name) goto last_with_slashes;/* * "." and ":" Is special-". Especially so because it have * to is able to know is about the current root directory and * parent relationships. */if (this.name[0] = = '. ') switch (this.len) {default:break;case 2:if (this.name[1]! = '. ') Break;follow_dotdot (nd); inode = nd->dentry->d_inode;/* fallthrough */case 1:continue;} /* * See if the low-level filesystem might want * to use its own hash. */if (nd->dentry->d_op

there is no end address for an interval above the given address, refer to this address is inBelow the stack, which is more than 3G bytes. Goto Bad_area;if (Vma->vm_start The interrupt/exception response mechanism of the kernel also passes over two parameters. One is the pt_regs struct pointer regs, which points to a copy of the contents of each register in the CPU on the eve of the exception. Error_code further indicates the specific reason for the f

Abstract: Linux kernel source is really good stuff, is the crystallization of many master thinking, inLinuxA header file in the source code islist.h。 A lotLinuxUnder the source code will use this header file, it defines a structur

I wrote several Linux kernel modules, but every time I wrote the code in a source file, I tried to write it in two. c files last time, and the result was not compiled. In desperation, rename one of the. c files to a. h file, and include the file to another file. However, it is strange to Write Functions in the. h file. Today, I checked the following kbuild docume

the operating system that they want to run when the computer starts. GRUB can be used to select different cores on the operating system partition or to pass startup parameters to those cores. Gnu gnu plan, also known as the Slave program, is by the richard Stallman in 1983 year 9 Span style= "Color:rgb (51,51,51)" > month 27 operating system was the first to publish the message on the net.unix-wizards newsgroup, with articles explaining why the program was launched, such as the

The Adventures of the Linux kernel MD source explanation # 14RAID5 non-ribbon readReprint Please specify Source: Http://blog.csdn.net/liumangxiongSuppose the non-bar reads. Then at least two bars of reading are involved, which requires reading the data separately from the two bars. Then the whole result is returned to the upper layer. Next we'll see how to split

executed. Through thisWay, the compiler will be in the process of compiling, the more likely code is followed by the code behind, thereby reducing the performance of the instruction jump caused by the decline.Like what:if (Likely (a>b)) {fun1 ();}This is where the programmer can determine that a>b is likely to be larger in the program execution process, so likely () is used to tell the compiler to FUN1 ()

greater, with the unlikely (), the more the statement after the else is executed. Through thisWay, the compiler will be in the process of compiling, the more likely code is followed by the code behind, thereby reducing the performance of the instruction jump caused by the decline.Like what:if (Likely (a>b)) {fun1 ();}This is where the programmer can determine that a>b is likely to be larger in the program

Let's start by looking at the following procedure:#include First, parent process fork out child processRefer to the Linux kernel source-code Scenario Analysis-fork (). The return value of fork refers to the Linux kernel source scenario analysis-system call, which returns the

From: http://www.ibm.com/developerworks/cn/linux/l-scheduler/The source code for the 2.6 version scheduler is well encapsulated in the/USR/SRC/LINUX/KERNEL/SCHED.C file. We summarize some useful functions that can be found in this file in table 1. table 1. Features of the Linux 2.6 scheduler function name functions Description

Simply following Google's official online documentation can't build the android kernel source easily, here are some notes to build it succeed, all is from my own experiments and testing. 1. "elf XXX" error as below: The solution is about adding a "elf. H" file, and some slight changes on another 2 files: Step 1: Add a file: "elf. H" to/kernel repository/

Linux system is divided into several major modules: process scheduling, memory management, process communications, file systems, network modules; Each module has a certain connection, like a spider web, so this is why the Linux kernel is so difficult to understand, because do not know where to start to learn. Many people will follow the system to start bios-->bootsect-->setup-->head-->main--> To learn, but in the end you'll find that when you look at

In the previous article Linux kernel source code scenario analysis-the slab-allocation and release of memory management, finally formed the structure as follows:Figure 1We see a number of pages occupied by free slab blocks, and we do not release them ourselves; we collect them through kmem_cache_reap and Kmem_cache_shrink. The difference between them is:1, we fir

Ping Host (note that you need to shut down the Windows Firewall, Win7 by default is ping, not aware of the problem at first, thought it was the network settings of their own virtual machine problems, tossing a very early IP configuration, however, there is no egg to use.) /(ㄒoㄒ)/~~) zfchen@zfchen-e440:~$ Ping 192.168.1.110 ping 192.168.1.110 (192.168.1.110) bytes of data. Bytes from 192.168.1.110:icmp_req=1 ttl=64 time=0.230 ms bytes from 192.168.1.110:icmp_req=2 ttl=64 Ms Windows side Firewal

corresponding machine commands, which may be executed by machines.4. Assembly Process) The assembly process refers to the process of translating the assembly language code into the target machine instructions. For each C language source program processed by the translation system, the corresponding target file will be obtained after this processing. What is stored in the target file is the machine language

This article mainly introduces the method of analyzing the source code, which includes the construction of the environment, the installation of the analysis tools and the basic operation of the source debugging. I. List of tools PHP7.0.12 Gdb Clion Second, the source

In the previous article we have introduced the Source Code analysis tool installation, configuration and debugging methods, this article we will describe the PHP source directory structure. I. Catalogue overview As php-7.0.12 An example, read the source of the students should find the

Some strategic code, algorithm code, and The code that is not related to the driver's internal API can be used at the application layer for testing, To speed up writing, This is obvious, and the application layer has its advantages in this regard. How to implement this function. Mainly writing two files One is the sources file and the other is the Sample. def fil

needs to print. The original process itself is printed two times (first and last) so the 2+7*2-=16 bar is printed, where 4772 prints the 2+7=9 barSince this is the case (the child process replicates the buffer of the parent process), why did the experiment with ' \ n ' in the previous print statement be "correct"? This is determined by the different buffering properties for the device. Our reality is that the device that runs the result is a standard output device, and the standard output devic