On Fri, 14 Nov 2014 10:39:34 -0600 Alex Elder <[email protected]> wrote: > There is only one read of logbuf_cpu: > if (unlikely(logbuf_cpu == this_cpu)) { > This is called only while local interrupts are disabled, so > if this condition holds it cannot be due to an interrupt--it
Unless an NMI called printk. > must be due to simple recursion into printk() while inside > the spinlock-protected critical section. > QED. (Well, please correct me where I'm wrong...) > Except for the NMI case, I believe you are correct with the rest of your analysis. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
