linux-kernel - Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

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Message-ID: <475EC895.2060207@keyaccess.nl>
Date:	Tue, 11 Dec 2007 18:27:49 +0100
From:	Rene Herman <rene.herman@...access.nl>
To:	"David P. Reed" <dpreed@...d.com>
CC:	Andi Kleen <andi@...stfloor.org>,
	"linux-os (Dick Johnson)" <linux-os@...logic.com>,
	David Newall <david@...idnewall.com>,
	Paul Rolland <rol@...917.net>,
	"H. Peter Anvin" <hpa@...or.com>, Krzysztof Halasa <khc@...waw.pl>,
	Pavel Machek <pavel@....cz>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, rol@...be.net
Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64
 with MCP51 laptops

On 11-12-07 18:04, Rene Herman wrote:

> On 11-12-07 18:00, David P. Reed wrote:
> 
>> Which port do you want me to test?
> 
> Oh, thought your previous reply was already responding to this. The 
> "other diagnostic port", 0xed. The point is not so much that it's going 
> to be a good alternate solution but to exclude it being a possible 
> solution.
> 
>> Also, I can run the timing test on my machine if you share the source
>> code so I can build it.
> 
> Thanks, would be interesting. This one:

Okay, this needs to be junked. I don't get it, but I get different results 
from an -O2 and an -O0 compile on this one.

Anyone?

Rene.

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