August 2004
Intermediate to advanced
720 pages
23h 44m
English
book
Design and Implementation of the FreeBSD Operating System, The
by Marshall Kirk McKusick, George V. Neville-Neil
Content preview from Design and Implementation of the FreeBSD Operating System, The
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Chapter 3. Kernel Services
3.1 Kernel Organization
The FreeBSD kernel can be viewed as a service provider to user processes. Processes usually access these services through system calls. Some services, such as process scheduling and memory management, are implemented as processes that execute in kernel mode or as routines that execute periodically within the kernel. In this chapter, we describe how kernel services are provided to user processes, and some of the ancillary processing done by the kernel. Then we describe the basic kernel services provided by FreeBSD and provide details of their implementation.
System Processes
All FreeBSD user-level processes originate from a single process that is crafted by the kernel at startup. ...
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