On Tue, 2009-02-17 at 07:51 -0800, Paul E. McKenney wrote: > On Tue, Feb 17, 2009 at 12:26:57PM +0100, Nick Piggin wrote: > > + spin_lock(&q->lock); > > + list_replace_init(&q->list, &list); > > + spin_unlock(&q->lock); > > OK, I'll bite... > > How do we avoid deadlock in the case where a pair of CPUs send to each > other concurrently? Sender takes the lock with interrupts-disabled. That should prevent any deadlock, right? -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
