"David Laight" <david.lai...@aculab.com> wrote on 10/31/2013 02:28:56 PM:
> So even though the wmb() in the writer ensures the writes are correctly > ordered, the reader can read the old value from the second location from > its local cache. In case of circular buffer, the only thing that producer reads is @tail, and nothing wrong will happen if producer reads old value of @tail. Moreover, adherents of smp_mb() insert it *after* the read of @tail, so it cannot prevent reading of old value anyway. -- Victor -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
