As introduced in an earlier section, bottom halves are kernel mechanisms for executing deferred work, and can be engaged by any kernel code to defer execution of non-critical work until some time in the future. To support implementation and for management of deferred routines, the kernel implements special frameworks, called softirqs, tasklets, and work queues. Each of these frameworks constitute a set of data structures, and function interfaces, used for registering, scheduling, and queuing of the bottom half routines. Each mechanism is designed with a distinct policy for management and execution of bottom halfs. Drivers and other kernel services that require deferred execution will need to bind and schedule their BH routines through the appropriate framework.
Mastering Linux Kernel Development
By :
Mastering Linux Kernel Development
By:
Overview of this book
Mastering Linux Kernel Development looks at the Linux kernel, its internal arrangement and design, and various core subsystems, helping you to gain significant understanding of this open source marvel. You will look at how the Linux kernel, which possesses a kind of collective intelligence thanks to its scores of contributors, remains so elegant owing to its great design.
This book also looks at all the key kernel code, core data structures, functions, and macros, giving you a comprehensive foundation of the implementation details of the kernel’s core services and mechanisms. You will also look at the Linux kernel as well-designed software, which gives us insights into software design in general that are easily scalable yet fundamentally strong and safe.
By the end of this book, you will have considerable understanding of and appreciation for the Linux kernel.
Table of Contents (12 chapters)
Preface
Free Chapter
Comprehending Processes, Address Space, and Threads
Deciphering the Process Scheduler
Signal Management
Memory Management and Allocators
Filesystems and File I/O
Interprocess Communication
Virtual Memory Management
Kernel Synchronization and Locking
Interrupts and Deferred Work
Clock and Time Management
Module Management
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