On 04/23/2010 02:31 PM, Zachary Amsden wrote:
> Does lfence / mfence actually serialize? I thought there was some
> great confusion about that not being the case on all AMD processors,
> and possibly not at all on Intel.
>
> A trap, however is a great way to serialize.
>
> I think, there is no serializing instruction which can be used from
> userspace which does not trap, at least, I don't know one off the top
> of my head.
rsm is not technically privileged... but not quite usable from usermode ;)
J
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
