The Design and Implementation of the FreeBSD Operating System

The most complete, authoritative technical guide to the FreeBSD kernels internal structure has now been extensively updated to cover all major improvements between Versions 5 and 11. Approximately one-third of this editions content is completely new, and another one-third has been extensively rewritten.   Three long-time FreeBSD project leaders begin with a concise overview of the FreeBSD kernels current design and implementation. Next, they cover the FreeBSD kernel from the system-call level downfrom the interface to the kernel to the hardware. Explaining key design decisions, they detail the concepts, data structures, and algorithms used in implementing each significant system facility, including process management, security, virtual memory, the I/O system, filesystems, socket IPC, and networking.   This Second Edition   Explains highly scalable and lightweight virtualization using FreeBSD jails, and virtual-machine acceleration with Xen and Virtio device paravirtualization   Describes new security features such as Capsicum sandboxing and GELI cryptographic disk protection   Fully covers NFSv4 and Open Solaris ZFS support   Introduces FreeBSDs enhanced volume management and new journaled soft updates   Explains DTraces fine-grained process debugging/profiling   Reflects major improvements to networking, wireless, and USB support   Readers can use this guide as both a working reference and an in-depth study of a leading contemporary, portable, open source operating system. Technical and sales support professionals will discover both FreeBSDs capabilities and its limitations. Applications developers will learn how to effectively and efficiently interface with it; system administrators will learn how to maintain, tune, and configure it; and systems programmers will learn how to extend, enhance, and interface with it.   Marshall Kirk McKusick writes, consults, and teaches classes on UNIX- and BSD-related subjects. While at the University of California, Berkeley, he implemented the 4.2BSD fast filesystem. He was research computer scientist at the Berkeley Computer Systems Research Group (CSRG), overseeing development and release of 4.3BSD and 4.4BSD. He is a FreeBSD Foundation board member and a long-time FreeBSD committer. Twice president of the Usenix Association, he is also a member of ACM, IEEE, and AAAS.   George V. Neville-Neil hacks, writes, teaches, and consults on security, networking, and operating systems. A FreeBSD Foundation board member, he served on the FreeBSD Core Team for four years. Since 2004, he has written the Kode Vicious column for Queue and Communications of the ACM. He is vice chair of ACMs Practitioner Board and a member of Usenix Association, ACM, IEEE, and AAAS.