VTIME_GUEST
if (vtime->state == VTIME_GUEST)
else if (vtime->state == VTIME_GUEST)
if (state == VTIME_GUEST && task_nice(tsk) <= 0)
if (state == VTIME_GUEST && task_nice(tsk) > 0)
case VTIME_GUEST:
if (vtime->state == VTIME_GUEST)
vtime->state = VTIME_GUEST;
vtime->state = VTIME_GUEST;