On Tue, 17 Jun 2014, Linus Torvalds wrote: > On Jun 17, 2014 6:28 AM, "Christoph Lameter" <[email protected]> wrote: > > > > Even alpha maintains the illusion of changes becoming visible in the > > proper order for the currently executing thread. No barriers are needed. > > No Christoph, alpha really doesn't. Barriers needed.
Everythig breaks if a single hardware execution thread can no longer observe a consistent view of the world of the data it modifies. We are not talking about synchronization here between multiple hardware threads. This is simply code running on a single hardware thread and all architectures maintain the uniprocessor illusion there. -- 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/
