How does linux kernel wake idle processor up when new task created?

Question

I\'m newbie on Linux Kernel. Currently, I looked into idle codes and had a quesition. When processor doesn\'t have any taks in their own runqueue then it may go into idle mo

Answer 1

just set the CPU's flag like below code after create the thread.

 = > thread's task_struct->flags |= PF_WAKE_UP_IDLE;