On 04/23/2010 11:35 AM, Jeremy Fitzhardinge wrote:
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 ;)
rsm under hardware virtualization makes my head hurt
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