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

[Parmenides]

2011/10/14 Daniel Baluta <daniel.baluta at gmail.com>:
> Is kernel preemption activated? Could you check for # grep
> CONFIG_PREEMPT .config?
>

Yes. I really have not select CONFIG_PREEMPT option. Now, I turn it on
and things are ok. Thanks a lot.