linux-kernel - Re: [PATCH] Add a text

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Message-ID: <529684AB.6090804@zytor.com>
Date:	Wed, 27 Nov 2013 15:47:55 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	Andi Kleen <andi@...stfloor.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] Add a text_poke syscall v2

On 11/27/2013 03:40 PM, Borislav Petkov wrote:
> 
> But I'd guess that depends on the uarch because Bulldozer, reportedly,
> implements MFENCE by causing a pipeline stall which controls the
> prefetches too:
> 

An implementation can always make the memory model stronger, but not weaker.

	-hpa


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