From: "David P. Reed" <dpreed@reed.com>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Rene Herman <rene.herman@keyaccess.nl>,
Zachary Amsden <zach@vmware.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Christer Weinigel <christer@weinigel.se>,
Ondrej Zary <linux@rainbow-software.org>,
Bodo Eggert <7eggert@gmx.de>, Ingo Molnar <mingo@elte.hu>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Paul Rolland <rol@as2917.net>, Pavel Machek <pavel@ucw.cz>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
rol <rol@witbe.net>
Subject: Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.
Date: Mon, 14 Jan 2008 17:22:03 -0500 [thread overview]
Message-ID: <478BE08B.3090306@reed.com> (raw)
In-Reply-To: <1200347847.2647.97.camel@shinybook.infradead.org>
David Woodhouse wrote:
> On Fri, 2008-01-11 at 09:35 -0500, David P. Reed wrote:
>
>> Using any "unused port" for a delay means that the machine check
>> feature is wasted and utterly unusable.
>>
>
> Not entirely unusable. You can recover silently from the machine check
> if it was one of the known accesses to the 'unused port'. It certainly
> achieves a delay :)
>
I'm sure that's what the driver writers had in mind. ;-)
And I think we probably have a great shot at getting Intel, Microsoft,
HP, et al.. to add a feature for Linux to one of the ACPI table
specifications that define an "unused port for delay purposes" field in
the ACPI 4.0 spec, and retrofit it into PC/104 machine BIOSes. At least
Microsoft doesn't have a patent on using port 80 for delay purposes. :-)
next prev parent reply other threads:[~2008-01-14 22:29 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <9BdU5-1YW-9@gated-at.bofh.it>
[not found] ` <9BeZN-3Gf-5@gated-at.bofh.it>
[not found] ` <9BnTB-1As-31@gated-at.bofh.it>
[not found] ` <9BrX4-8go-1@gated-at.bofh.it>
[not found] ` <9BuBG-4eR-51@gated-at.bofh.it>
[not found] ` <9BvRd-6aL-71@gated-at.bofh.it>
[not found] ` <9GRQW-1DX-13@gated-at.bofh.it>
[not found] ` <9GSah-23W-1@gated-at.bofh.it>
[not found] ` <9GSDy-2GD-23@gated-at.bofh.it>
[not found] ` <9GTpK-40d-15@gated-at.bofh.it>
[not found] ` <9GUvy-5H2-11@gated-at.bofh.it>
[not found] ` <9GVKU-7SS-25@gated-at.bofh.it>
2008-01-07 19:38 ` [PATCH] x86: provide a DMI based port 0x80 I/O delay override Bodo Eggert
2008-01-07 19:46 ` H. Peter Anvin
2008-01-07 22:02 ` Bodo Eggert
2008-01-07 22:10 ` H. Peter Anvin
2008-01-07 22:27 ` Bodo Eggert
2008-01-07 22:59 ` Rene Herman
2008-01-07 23:24 ` H. Peter Anvin
2008-01-07 23:26 ` Rene Herman
2008-01-08 0:10 ` [linux-kernel] " David P. Reed
2008-01-08 0:13 ` H. Peter Anvin
2008-01-08 1:38 ` David P. Reed
2008-01-08 17:10 ` Ondrej Zary
2008-01-08 17:24 ` David P. Reed
2008-01-08 17:38 ` Ondrej Zary
2008-01-08 18:44 ` David P. Reed
2008-01-08 18:51 ` Alan Cox
2008-01-08 19:15 ` David P. Reed
2008-01-08 19:23 ` Alan Cox
2008-01-08 19:51 ` David P. Reed
2008-01-09 2:52 ` Zachary Amsden
2008-01-09 5:19 ` H. Peter Anvin
2008-01-09 21:53 ` Zachary Amsden
2008-01-09 22:22 ` David P. Reed
2008-01-11 1:36 ` Zachary Amsden
2008-01-11 3:05 ` Rene Herman
2008-01-11 14:35 ` David P. Reed
2008-01-11 14:37 ` Alan Cox
2008-01-11 15:07 ` David P. Reed
2008-01-11 17:54 ` H. Peter Anvin
2008-01-11 14:49 ` Rene Herman
2008-01-14 21:57 ` David Woodhouse
2008-01-14 22:22 ` David P. Reed [this message]
2008-01-16 14:36 ` David Newall
2008-01-16 14:55 ` Alan Cox
2008-01-16 19:15 ` David Newall
2008-01-16 20:08 ` Alan Cox
2008-01-17 6:25 ` David Newall
2008-01-17 12:02 ` Alan Cox
2008-01-17 13:36 ` David Newall
2008-01-17 13:55 ` Rene Herman
2008-01-17 21:58 ` David Newall
2008-01-17 22:13 ` Rene Herman
2008-01-18 13:37 ` David Newall
2008-01-18 14:05 ` Rene Herman
2008-01-17 15:51 ` Alan Cox
2008-01-09 5:30 ` Christer Weinigel
2008-01-09 14:42 ` David P. Reed
2008-01-09 15:27 ` Rene Herman
2008-01-09 18:17 ` Zachary Amsden
2008-01-09 18:18 ` H. Peter Anvin
2008-01-09 20:26 ` Christer Weinigel
2008-01-09 21:59 ` H. Peter Anvin
2008-01-09 18:22 ` Adrian Bunk
2008-01-09 18:27 ` H. Peter Anvin
2008-01-08 19:25 ` Christer Weinigel
2008-01-08 20:28 ` David P. Reed
2008-01-08 21:43 ` Christer Weinigel
2008-01-08 22:24 ` David P. Reed
2008-01-08 18:51 ` Bodo Eggert
2008-01-08 19:13 ` Ondrej Zary
2008-01-09 21:01 ` Matthieu castet
2008-01-08 12:51 ` Bodo Eggert
2008-01-08 13:07 ` [linux-kernel] " David P. Reed
2008-01-08 14:37 ` Alan Cox
2008-01-08 14:09 ` Rene Herman
2008-01-08 14:31 ` Alan Cox
2008-01-07 23:57 ` [linux-kernel] " David P. Reed
2008-01-08 1:58 ` Alan Cox
2008-01-07 23:25 ` Alan Cox
2008-01-08 13:17 ` Bodo Eggert
2008-01-08 14:38 ` Alan Cox
2008-01-08 3:15 ` Christer Weinigel
[not found] <fa.u5p8NBl8IjcycTVVtf0K+YtqNQc@ifi.uio.no>
[not found] ` <fa.NOJkdyuk0c8CAqzZcG+pF1TzhJM@ifi.uio.no>
[not found] ` <fa.YLAHN7jSUo9phsICUHnxilN7/lk@ifi.uio.no>
[not found] ` <fa.SvgVgdNA9oz4F+tQ9MB2VRwr8ck@ifi.uio.no>
[not found] ` <fa.By1MDYK0MY/fwkCWWrAiQCxl5KM@ifi.uio.no>
[not found] ` <fa.97XrGLIGlvAy4P/TB5vHHrfBrIw@ifi.uio.no>
2008-01-10 0:37 ` [linux-kernel] " Robert Hancock
2008-01-10 0:44 ` Rene Herman
2008-01-10 14:41 ` David P. Reed
2007-12-17 13:02 Rene Herman
2007-12-17 17:14 ` H. Peter Anvin
2007-12-17 19:43 ` David P. Reed
2007-12-17 21:25 ` Alan Cox
2008-01-01 15:59 ` David P. Reed
2008-01-01 16:15 ` Alan Cox
2008-01-01 16:43 ` Ingo Molnar
2008-01-01 17:32 ` Alan Cox
2008-01-01 18:45 ` Ingo Molnar
2008-01-01 21:07 ` Alan Cox
2008-01-02 10:04 ` Ingo Molnar
2008-01-02 13:11 ` [linux-kernel] " David P. Reed
2008-01-02 13:21 ` Ingo Molnar
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