On 2011-09-15 22:20:03 (+0800), Parmenides [off-list ref] wrote:

   I will try to test how to create kernel threads and have write a
kernel module which creates a number of kernel threads running the
same function. But the results is somewhat confusing.

	static int kthread_init(void)
	{
	     int i;

	     for (i = 0; i < MAX_KTHREAD; i++){
		  ktask[i] = kthread_run(my_kthread, &i, "mythread[%d]", i);
	     }
	     return 0;
	}

You're passing the address of a stack variable (i) as data pointer.
That's not right, because as soon as you exit the kthread_init function
the data may be overwritten.

The fact that it works in some cases is pure coincidence.

Regards,
Kristof