<<Linux kernel development>> Process Management

The Process

On modern operating systems,processes provide two virtualizations:a virtualized processor and virtual memory

The Process Family Tree

iterates over the entire task list.On each iteration,task points to the next task in the list:

struct task_struct *task;

for_each_process(task){

}

Forking

The kernel runs the child process first.

In the common case of the child simply calling exec() immediately,this eliminates any copy-on-write overhead that would occur if the parent ran first and began writing to the address space.

Kernel Threads

Their mm pointer,which points at their address space,is NULL