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Date: Fri, 7 Dec 2007 17:31:16 +0100 From: Andi Kleen <andi@...stfloor.org> To: Alan Cox <alan@...rguk.ukuu.org.uk> Cc: Andi Kleen <andi@...stfloor.org>, "David P. Reed" <dpreed@...d.com>, linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com> Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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