Thank you for your replay, my friend. I must remind you I am doing all these in kernel space, what I really mean is everything is hard coded into Linux source code as an kernel image instead of a driver or module. I doubt kthread_create() is available in this sense. However, I gave it a try and receive the following error while doing "make zImage": /home/cyu021/linux/init/main.c:384: undefined reference to `kthread_create' make: *** [vmlinux] Error 1 Any help would be appreciated. On 2/23/06, Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote: > On Wed, 2006-02-22 at 23:44 +0800, James Yu wrote: > > I just found this thread on > > "http://mail.nl.linux.org/kernelnewbies/2003-09/msg00285.html"; > > and have an exactly opposite question. > > > > How do I remove a kernel thread in kernel mode ? > > I write a C-function in one of the Linux source files and create a > > kernel thread by invoking kernel_thread() to run the function, like: > > "kernel_thread(a1, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGNAL);" > > Function a1 simply invokes printk() to output some message on console. > > I invoke do_exit(0); at the end of a1, but a1's task_struct still > > exists in in task_struct list after its execution. > > this is why kernel_thread is the wrong API, don't use it! > Use kthread_create() and friends instead; that is a lot safer and better > API. > > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
