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Top : Kernel : Articles

Curious about Linux? Try Linux Desktop on the Cloud
Surely there should be an effortless way for a beginner to experiment with Linux for the first time? Indeed there is; step forward the online cloud lab.

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SSHDroid is a SSH server for Android devices. This application lets you to connect to your device from a PC and execute commands or edit files.


  • Bus-Independent Device Accesses
    Linux provides an API which abstracts performing IO across all busses and devices, allowing device drivers to be written independently of bus type
  • Conceptual Architecture of the Linux Kernel
    describes the abstract or conceptual software architecture of the Linux kernel. This level of architecture is concerned with the large-scale subsystems within the kernel, but not with particular procedures or variables
  • Concrete Architecture of the Linux Kernel
    to describe the concrete (as-built) architecture of the Linux kernel. A concrete architecture description of the Linux kernel serves as a high-level specification for developers to modify and extend the existing kernel source code
  • DEVFS and SCSI
    DEVFS and SCSI discusses the impact on the scsi subsystem of devfs, emphasizing naming issues.
  • Device Drivers Concluded
    the last of five articles about character device drivers. In this final section, Georg deals with memory mapping devices, beginning with an overall description of the Linux memory management concepts
  • Dissecting Interrupts and Browsing DMA
    the fourth in a series of five articles about writing character device drivers as loadable kernel modules. This month, we further investigate the field of interrupt handling. Though it is conceptually simple, practical limitations and constraints make this an ``interesting'' part of device driver writing, and several different facilities have been provided for different situations. We also investigate the complex topic of DMA
  • Dynamic Kernels: Discovery
    this article, the second of five, introduces part of the actual code to create custom module implementing a character device driver. It describes the code for module initialization and cleanup, as well as the open() and close() system calls
  • Dynamic Kernels: Modularized Device Drivers
    the first in a series of four articles co-authored by Alessandro Rubini and Georg Zezchwitz which present a practical approach to writing Linux device drivers as kernel loadable modules. This installment presents and introduction to thte topic, preparing the reader to understand next month's installment
  • I/O Event Handling Under Linux
    "I/O Event handling is about how your Operating System allows you to manage a large number of open files (file descriptors in UNIX/POSIX, or FDs) in your application"
  • Inside the Linux 2.6 Completely Fair Scheduler Scheduler
    The task scheduler is a key part of any operating system, and Linux® continues to evolve and innovate in this area. In kernel 2.6.23, the Completely Fair Scheduler (CFS) was introduced. This scheduler, instead of relying on run queues, uses a red-black tree implementation for task management. Explore the ideas behind CFS, its implementation, and advantages over the prior O(1) scheduler.
  • Kernel API changes from 2.2 to 2.4
    "2.4 linux kernel promises to have many cleanups and new features added. Changes should include many improvements in speed, resource utilisation and scalability compared to 2.0. Some of these improvements will require changes to the kernel API (the programming interface to internal kernel services)"
  • Linux and the DEC "Tulip" Chip
    contains information on using Linux with the Intel/Digital 21040/21041/21140/21142/21143 "Tulip" chips, as used on the SMC PCI EtherPower and many other ethercards
  • Linux Devfs (Device File System) FAQ
    devfs is an alternative to "real" character and block special devices on your root filesystem. Kernel device drivers can register devices by name rather than major and minor numbers. These devices will appear in devfs automatically, with whatever default ownership and protection the driver specified
  • Linux Kernel Module Programming Guide
    by Ori Pomerantz: so you want to write a kernel module. You know C, you've written a number of normal programs to run as processes, and now you want to get to where the real action is, to where a single wild pointer can wipe out your file system and a core dump means a reboot
  • Linux PCMCIA Programmer's Guide
    describes how to write kernel device drivers for the Linux PCMCIA Card Services interface. It also describes how to write user-mode utilities for communicating with Card Services
  • Network Buffers And Memory Management
    Alan Cox writes "Writing a network device driver for Linux is fundamentally simple---most of the complexity (other than talking to the hardware) involves managing network packets in memory"
  • PCI Management in Linux 2.2
    "Peripheral Component Interconnect (PCI) is a widely used bus standard that provides several advantages over other bus standards, such as EISA"
  • Programming Guide for Linux USB Device Drivers
    should give detailed information about the current state of the USB subsystem and its API for USB device drivers. The first section will deal with the basics of USB devices. You will learn about different types of devices and their properties. Going into detail you will see how USB devices communicate on the bus. The second section gives an overview of the Linux USB subsystem [2] and the device driver framework. Then the API and its data structures will be explained step by step. The last section of this document contains a reference of all API calls and their return codes
  • The Devil's in the Details
    the third of five on writing character device drivers, introduces concepts of reading, writing, and using ioctl-calls
  • The Linux RAID-1, 4, 5 Code
    a description of the implementation of the RAID-1, RAID-4 and RAID-5 personalities of the MD device driver in the Linux kernel, providing users with high performance and reliable, secondary-storage capability using software
  • The Venus kernel interface
    describes the communication between Venus and kernel level file system code needed for the operation of the Coda filesystem. This version document is meant to describe the current interface (version 1.0) as well as improvements we envisage

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