Why can the kernel be stuck by a busy kernel thread ?

[Daniel Baluta]

On Fri, Oct 14, 2011 at 5:04 PM, Parmenides <mobile.parmenides at gmail.com> wrote:
> Hi,
>
>   I code a kernel module which do some nop. When inserted into the
> kernel, the kernel will be stuck and can not reponse my keypress
> anymore. So, I have to reboot to get out. Why?

Is kernel preemption activated? Could you check for # grep
CONFIG_PREEMPT .config?

thanks,
Daniel.