Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754678AbXLLNVy (ORCPT ); Wed, 12 Dec 2007 08:21:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751859AbXLLNVr (ORCPT ); Wed, 12 Dec 2007 08:21:47 -0500 Received: from smtpq1.tilbu1.nb.home.nl ([213.51.146.200]:35060 "EHLO smtpq1.tilbu1.nb.home.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751602AbXLLNVq (ORCPT ); Wed, 12 Dec 2007 08:21:46 -0500 Message-ID: <475FE010.30208@keyaccess.nl> Date: Wed, 12 Dec 2007 14:20:16 +0100 From: Rene Herman User-Agent: Thunderbird 2.0.0.9 (X11/20071031) MIME-Version: 1.0 To: "linux-os (Dick Johnson)" CC: =?ISO-8859-15?Q?Alejandro_Riveira_Fern=E1ndez?= , Linux Kernel , dpreed@reed.com, Alan Cox , pavel@ucw.cz, andi@firstfloor.org, rol@as2917.net, Krzysztof Halasa , david@davidnewall.com, hpa@zytor.com, john@stoffel.org Subject: Re: [RFT] Port 0x80 I/O speed References: <475F1DC6.5090403@keyaccess.nl> <20071212004316.079e3a05@Varda> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -1.0 (-) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1286 Lines: 34 On 12-12-07 13:59, linux-os (Dick Johnson) wrote: > On Tue, 11 Dec 2007, [utf-8] Alejandro Riveira Fern?ndez wrote: >> On my AMD 3800 X2 (2000MHz) ULi M1697 2.6.24-rc5 i get: >> >> cycles: out 1844674407370808, in 1844674407369087 >> >> It is not constant but variations are not significant afaics >> > > It looks as though this hardware does not have a port 0x80 > and its access is trapped by the hardware with a long time-out! > This may be the reason when the _p was called "harmful" on this > platform! > > I'm not sure the "rules" for port access allow for this kind of > behavior. This design may be defective, needing to be brought > to the attention of the vendor. A decent vendor would update > a FPGA and provide code to burn a new BIOS. I'm afraid it's just the test that is "defective" as 64-bit code. For some reason "=A" doesn't mean edx:eax on amd64 even though it's a useful register pair to be able to name there as well. Didn't catch that being without amd64 machines myself. Oh well. gcc -m32 fixes it... Rene. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/