From: "H. Peter Anvin" <hpa@zytor.com>
To: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: Arjan van de Ven <arjan@infradead.org>,
Nick Piggin <npiggin@suse.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: LFENCE instruction (was: [rfc][patch 3/3] x86: optimise barriers)
Date: Mon, 15 Oct 2007 17:11:27 -0700 [thread overview]
Message-ID: <471401AF.4090802@zytor.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0710160004500.2604@artax.karlin.mff.cuni.cz>
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
next prev parent reply other threads:[~2007-10-16 0:15 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-15 20:47 LFENCE instruction (was: [rfc][patch 3/3] x86: optimise barriers) Mikulas Patocka
2007-10-15 21:37 ` Arjan van de Ven
2007-10-15 22:08 ` Mikulas Patocka
2007-10-16 0:11 ` H. Peter Anvin [this message]
2007-10-16 10:17 ` Mikulas Patocka
2007-10-16 15:42 ` LFENCE instruction H. Peter Anvin
2007-10-16 21:25 ` Mikulas Patocka
2007-10-16 0:22 ` LFENCE instruction (was: [rfc][patch 3/3] x86: optimise barriers) Nick Piggin
2007-10-16 10:33 ` Mikulas Patocka
2007-10-16 22:29 ` Nick Piggin
2007-10-16 23:05 ` Mikulas Patocka
2007-10-16 23:21 ` Nick Piggin
2007-10-17 0:30 ` Mikulas Patocka
2007-10-17 12:24 ` Nick Piggin
2007-10-18 17:06 ` Mikulas Patocka
2007-10-17 5:51 ` Herbert Xu
2007-10-17 12:28 ` Nick Piggin
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