Note: this article is a followup to Zack Brown's "Android Low Memory Killer—In or Out?" Linux kernel headers are the unstable, constantly-changing, internal API of the kernel. This includes internal ...

Modern CPUs can run in two modes: kernel mode and user mode. When a CPU runs in kernel mode, an extended set of instructions is allowed, as is free access to anywhere in memory and device registers.

Editor's Note: Linux remains an attractive option for embedded systems developers. In fact, industry surveys such as the Embedded Market Study by UBM (EDN's parent company) consistently show interest ...