Understanding the Linux Kernel, Third Edition

"Understanding the Linux Kernel, Third Edition" is a comprehensive and well-written book that serves as a valuable resource for understanding the Unix operating system and the Linux kernel. The author does an excellent job of explaining the intricacies of the kernel, including subsystems such as interrupts, workqueues, synchronization primitives, and filesystems. While the book covers the 2.6 kernel, which may feel outdated for some readers in 2021, it still provides a solid foundation for understanding how different kernel subsystems work. It is particularly useful for those interested in writing drivers and learning about the internals of the kernel. One of the book's strengths is its ability to strike a balance between providing an overview of Unix/Linux and delving deep into technical details. It offers a comprehensive exploration of the subject matter without overwhelming readers with excessive complexity. However, some readers have expressed that they were hoping for more coverage on topics such as the kernel layout in memory, load-time and boot-time patching, and the organization of kernel files in the file system. Additionally, one reviewer felt that the section on VFS could have been better explained and sought additional resources for a clearer understanding. Overall, "Understanding the Linux Kernel, Third Edition" is an outstanding and highly recommended book for those looking to gain insights into the inner workings of the Linux kernel. While it may have some minor shortcomings, it is a valuable asset for both beginners and more advanced readers.