On 01/31/13 01:27, Jacky Lam wrote: > Thanks Stano, > > I am still debugging this driver. But I find very strange that > sometimes printk() in interrupt handler do not output anything. This > makes me very difficult to debug. Is it RT patch's expected behaviour? > Or I am doing something wrong?? If CONFIG_PREEMPT_RT_FULL then printk() from irq context will be buffered but the console driver will not be called to flush the buffer. The next printk() outside irq context will flush the buffer. -Frank -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html