OPERATING SYSTEM DESIGN

General Overview of the System History, System architecture, User perspective, Operating system services, Assumptions about hardware. Introduction to Kernel Architecture of Unix operating system, Introduction to system concepts, Kernel data structure, System administration. The Buffer Cache Buffer headers, Structure of the buffer pool, Scenarios for retrieval of buffer, Reading and writing disk blocks, Advantages and disadvantages of the buffer cache. Internal Representation of Files Inodes, Structure of a regular file, Directories, Conversion of path name to an inode, Super block, Inode assignment to new file, Allocation of disk blocks. System Calls for the File System Open; Read, Write, File and record locking, Adjusting and position of file, Close, File creation, Creation of special files, Change directory and change root, STAT and FSTAT, Pipes, DUP, Mounting and unmounting file system, Link, unlink, File system abstractions, File system maintenance The Structure of Process Process states and transitions, Layout of system memory, The context of process, Saving the context of a process, Manipulation of the process address space, Sleep. Process Control Process creation, Signals, Process termination, Awaiting process termination, Invoking other programs, The user ID of a process, Changing the size of a process, The shell, System boot and the init process. Process and the Kernel Introduction, Mode, Space and context, The process abstraction, Executing in Kernel mode, Synchronization, Process Scheduling, Signals, New process programs.