我的技术笔记

emacs的学习手册，耐心的看看，就会成为emacs高手啦

Linux 文件预读 算法磁盘I/O性能的发展远远滞后于CPU和内存，因而成为现 代计算机系统的一个主要瓶颈。预读可以有效的减少磁盘的寻道次数和应用程序的I/O等 待时间，是改进磁盘读I/O性能的重要优化手段之一。本文作者是中国科学技术大学自动 化系的博士生，他在1998年开始学习Linux，为了优化服务器的性能，他开始尝试改进 Linux kernel，并最终重写了内核的文件预读部分，这些改进被收录到Linux Kernel 2.6.23及其后续版本中。

非常经典的LInux内核讲解资料： In order to thoroughly understand what makes Linux tick and why it works so well on a wide variety of systems, you need to delve deep into the heart of the kernel. The kernel handles all interactions between the CPU and the external world, and determines which programs will share processor time, in what order. It manages limited memory so well that hundreds of processes can share the system efficiently, and expertly organizes data transfers so that the CPU isn't kept waiting any longer than necessary for the relatively slow disks.The third edition of Understanding the Linux Kernel takes you on a guided tour of the most significant data structures, algorithms, and programming tricks used in the kernel. Probing beyond superficial features, the authors offer valuable insights to people who want to know how things really work inside their machine. Important Intel-specific features are discussed. Relevant segments of code are dissected line by line. But the book covers more than just the functioning of the code; it explains the theoretical underpinnings of why Linux does things the way it does.

Object-oriented programming is the current cure-all — although it has been around for much more then ten years. At the core, there is little more to it then finally applying the good programming principles which we have been taught for more then twenty years. C++ (Eiffel, Oberon-2, Smalltalk ... take your pick) is the New Language because it is object-oriented — although you need not use it that way if you do not want to (or know how to), and it turns out that you can do just as well with plain ANSI-C. Only object-orientation permits code reuse between projects — although the idea of subroutines is as old as computers and good programmers always carried their toolkits and libraries with them.

C++代码设计的重用模式介绍。是一部比较好的设计模式参考资料

SCSI has emerged as a popular protocol in the storage world. This document is a guide to understanding the implementation of SCSI in the Linux 2.6.X kernel. This project analyzes the code implementing the SCSI protocol, provides the big picture involving the IO, explains the entry points, data structures and the exported functions. The project is intended as a reference for experimenters and developers who would be working on the SCSI module in Linux

面向对象存储系统，对象是数据存储的基本单元，提供类似文件的访问接口