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Date: Fri, 7 Dec 2007 17:31:16 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andi Kleen <andi@firstfloor.org>, "David P. Reed" <dpreed@reed.com>,
       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: <20071207163116.GB5992@one.firstfloor.org>
References: <475879CD.9080006@reed.com> <p733auekcly.fsf@bingen.suse.de> <20071207160439.71b7f46a@the-village.bc.nu>
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> You don't need to. Port 0x80 historically is about 8uS so just udelay(8)
> and make sure the initial default delay is conservative enough before the

How would you make it conservative enough handling let's say a 6Ghz CPU
that can execute multiple jumps per cycle?

-Andi