Re: LFENCE instruction (was: [rfc][patch 3/3] x86: optimise barriers)
From: H. Peter Anvin
Date: Mon Oct 15 2007 - 20:15:45 EST
Mikulas Patocka wrote:
I know about unordered stores (movnti & similar) --- they basically use
write-combining method on memory that is normally write-back --- and they
need sfence. But which one instruction does unordered load and needs
lefence?
PREFETCHNTA.
-hpa
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