On Fri, 2013-09-27 at 16:50 +0200, Peter Zijlstra wrote:
> On Fri, Sep 27, 2013 at 07:34:55AM -0700, Joe Perches wrote:
> > That would make it seem as if all barriers are SMP no?
>
> I would think any memory barrier is ordering against someone else; if
> not smp then a device/hardware -- like for instance the hardware page
> table walker.
>
> Barriers are fundamentally about order; and order only makes sense if
> there's more than 1 party to the game.
But not necessarily more than 1 kind of parties. It is perfectly
possible to have a barrier against other threads running the same
function.
Regards
Oliver
--
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/
