# Linux kernel concepts

This chapter describes various concepts which are used in the Linux kernel.

* [Per-CPU variables](https://proninyaroslav.gitbooks.io/linux-insides-ru/content/Concepts/per-cpu.html)
* [CPU masks](https://proninyaroslav.gitbooks.io/linux-insides-ru/content/Concepts/cpumask.html)
* [The initcall mechanism](https://proninyaroslav.gitbooks.io/linux-insides-ru/content/Concepts/initcall.html)
* [Notification Chains in Linux Kernel](https://proninyaroslav.gitbooks.io/linux-insides-ru/content/Concepts/notification_chains.html)