Scheduler on the processes running in kernel mode

 

The book "understanding Linux kernel" mentions several ways which will suspend a process running in kernel mode (Chapter 1, page 22). Here they are:

  • a system call request cannot be satisfied immediately
  • The CPU detects an exception
  • A hardware interrupt occurs
  • An interrupt occurs while the CPU is running with kernel preemption enabled, and a higher priority process is runnable.

    • It does not mention the process runs out its time-slice and the scheduler brings another same priority process to run. I think this should be one case to suspend a process running in kernel mode. Please comment.

    调度程序在定时器中断运行时检测到时间片结束，该定时器中断时间小于3。

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