On Tue, Feb 04, 2014 at 10:58:40AM -0800, Linus Torvalds wrote: > On Tue, Feb 4, 2014 at 10:41 AM, Peter Zijlstra <[email protected]> wrote: > > > > Still doesn't make sense, because if we need the first sync to stop > > writes from being re-ordered with the ll-sc, we also need the second > > sync to avoid the same. > > Presumably octeon doesn't do speculative writes, only *buffered* writes.
Speculative writes are bad.. :-) > So writes move down, not up. Right, but the ll-sc store might move down over a later store. Say because the ll-sc needs to first get exclusive ownership of the cacheline where the later store would be to an already owned line. -- 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/
