Linux itself has a lot of advantages is stability, kernel lean, run with less resources required. There is no essential difference between embedded Linux and normal Linux.
One drawback of running Linux on an embedded system is that its core architecture has not been redesigned, but is streamlined directly from desktop Linux, with a preemptive multitasking capability that sometimes behaves poorly in real-time performance. Therefore, in order to provide real-time performance, embedded Linux needs to add real-time software modules. And these modules run the kernel space is the operating system implementation scheduling policy, hardware interrupt exception and the part of the execution program. Because these real-time software modules run in kernel space, code errors can disrupt the operating system, which affects the reliability of the entire system, which is a very serious flea power for real-time applications.
Linux comparison of embedded Linux and PC
