Date: Fri, 7 Dec 2007 15:54:30 +0100
From: Andi Kleen <andi@firstfloor.org>
To: "David P. Reed" <dpreed@reed.com>
Cc: Andi Kleen <andi@firstfloor.org>, linux-kernel@vger.kernel.org,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
       "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
Message-ID: <20071207145430.GA5992@one.firstfloor.org>
References: <475879CD.9080006@reed.com> <p733auekcly.fsf@bingen.suse.de> <47595DB2.5080302@reed.com>
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> My machine in question, for example, needs no waiting within CMOS_READs 
> at all.   And I doubt any other chip/device needs waiting that isn't 

I don't know about CMOS, but there were definitely some not too ancient
systems (let's say not more than 10 years) who required IO delays in the
floppy driver and the 8253/8259. But on those the jumps are already
far too fast.

-Andi
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