如何创建linux内核线程？

我查阅了《linux驱动》这本经典，但是一无所获！

drivers/net/8139too.c
1first create a thread
\"
tp->thr_pid = kernel_thread (rtl8139_thread, dev, CLONE_FS | CLONE_FILES);

\"
2at the begin of the thread change it. for example release user process mm, get init\'s fs . be the son of init....u can dig into source for my detail.
\"
daemonize ();
reparent_to_init();
spin_lock_irq(&current->sigmask_lock);
sigemptyset(&current->blocked);
recalc_sigpending(current);
spin_unlock_irq(&current->sigmask_lock);

strncpy (current->comm, dev->name, sizeof(current->comm) - 1);
current->comm[sizeof(current->comm) - 1] = \'\\0\';

\"

老大从哪找到的资料？

原来是源代码

 The Design of an In-Kernel Server
by Alessandro Rubini

 [url]http://www.linux-mag.com/2000-12/gear_01.html [/url]

kenel level thread是个很霸道的东东，除非你自己释放cpu的使用权，他会一直占用cpu， 用的时候注意了。