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Date: Tue, 11 Dec 2007 11:32:09 -0500 From: "John Stoffel" <john@...ffel.org> To: Rene Herman <rene.herman@...access.nl> Cc: Paul Rolland <rol@...917.net>, David Newall <david@...idnewall.com>, "H. Peter Anvin" <hpa@...or.com>, Krzysztof Halasa <khc@...waw.pl>, Pavel Machek <pavel@....cz>, Andi Kleen <andi@...stfloor.org>, Alan Cox <alan@...rguk.ukuu.org.uk>, "David P. Reed" <dpreed@...d.com>, 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 Here's my results on a PIII Xeon, 550mhz, 440GX chipset, and an ISA slot, which until recently was actually used with an 8 port serial card: jfsnew:~/src> sudo ./port80 out: 729 in : 348 jfsnew:~/src> sudo ./port80 out: 729 in : 354 jfsnew:~/src> sudo ./port80 out: 729 in : 350 jfsnew:~/src> sudo ./port80 out: 728 in : 346 jfsnew:~/src> sudo ./port80 out: 730 in : 340 -- 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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