static void oom_kill(void)
{
	struct task_struct *p, *q;

	read_lock(&tasklist_lock);
	p = select_bad_process();

	/* Found nothing?!?! Either we hang forever, or we panic. */
	if (p == NULL)
		panic("Out of memory and no killable processes...\n");

	/* kill all processes that share the ->mm (i.e. all threads) */
	for_each_task(q) {
		if (q->mm == p->mm)
			oom_kill_task(q);
	}
	read_unlock(&tasklist_lock);

	/*
	 * Make kswapd go out of the way, so "p" has a good chance of
	 * killing itself before someone else gets the chance to ask
	 * for more memory.
	 */
	yield();
	return;
}