kthread

find current kernel threads in the system:
ps -ef
the process with [ ] is kernel thread

is kernel thread preemptive?
1. if CONFIG_PREEMPT is defined, kernel thread is preemptive
2. if CONFIG_PREEMPT is not defined, kernel thread is not preemptive. It will freeze the system if it doesn’t go to sleep.

kthread_create

kernel_thread

resource:
http://svn.openfoundry.org/vwebsdk/Reference/kernel_thread.txt
http://www.jollen.org/blog/2006/11/_scheduler_running_process.html#more