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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Giel van Schijndel <me@mortis.eu>,
	Jesse Barnes <jbarnes@virtuousgeek.org>,
	Hans de Goede <hdegoede@redhat.com>,
	Jean Delvare <khali@linux-fr.org>,
	Jonathan Cameron <jic23@cam.ac.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Bjorn Helgaas <bjorn.helgaas@hp.com>,
	Dominik Brodowski <linux@dominikbrodowski.net>,
	Laurens Leemans <laurens@signips.com>,
	lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] resource: shared I/O region support
Date: Mon, 29 Mar 2010 19:39:33 +0100	[thread overview]
Message-ID: <20100329193933.1a04762b@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <4BB0E73F.2080104@zytor.com>

> What I *really* object to with this patch is that it inherently assumes
> that there is only one multiplexed resource in the entire system... but
> of course nowhere enforces that.

The patch does nothing of the sort. Not unless there is a bug I am not
seeing anyway. It does assume nobody tries to grab pairs of such
resources as it doesn't do deadlock avoidance.

It's now a shared resource patch however, its a multiplexor patch and
that is precisely why it is called MUX not SHARED or OVERLAY
Alan

WARNING: multiple messages have this Message-ID (diff)
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Giel van Schijndel <me@mortis.eu>,
	Jesse Barnes <jbarnes@virtuousgeek.org>,
	Hans de Goede <hdegoede@redhat.com>,
	Jean Delvare <khali@linux-fr.org>,
	Jonathan Cameron <jic23@cam.ac.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Bjorn Helgaas <bjorn.helgaas@hp.com>,
	Dominik Brodowski <linux@dominikbrodowski.net>,
	Laurens Leemans <laurens@signips.com>,
	lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org
Subject: Re: [lm-sensors] [PATCH 1/3] resource: shared I/O region support
Date: Mon, 29 Mar 2010 18:39:33 +0000	[thread overview]
Message-ID: <20100329193933.1a04762b@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <4BB0E73F.2080104@zytor.com>

> What I *really* object to with this patch is that it inherently assumes
> that there is only one multiplexed resource in the entire system... but
> of course nowhere enforces that.

The patch does nothing of the sort. Not unless there is a bug I am not
seeing anyway. It does assume nobody tries to grab pairs of such
resources as it doesn't do deadlock avoidance.

It's now a shared resource patch however, its a multiplexor patch and
that is precisely why it is called MUX not SHARED or OVERLAY
Alan

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lm-sensors mailing list
lm-sensors@lm-sensors.org
http://lists.lm-sensors.org/mailman/listinfo/lm-sensors

  parent reply	other threads:[~2010-03-29 18:37 UTC|newest]

Thread overview: 159+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-23 14:12 [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Giel van Schijndel
2010-03-23 14:12 ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O regions Giel van Schijndel
2010-03-23 14:17 ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Giel van Schijndel
2010-03-23 14:17   ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Giel van Schijndel
2010-03-23 23:12   ` [PATCH 1/4] [RFC] hwmon: f71882fg: Add support for the Fintek F71808E Giel van Schijndel
2010-03-23 23:12     ` [lm-sensors] [PATCH 1/4] [RFC] hwmon: f71882fg: Add support for the Giel van Schijndel
2010-03-23 23:12     ` [PATCH 2/4] hwmon: f71882fg: prepare for addition of watchdog support Giel van Schijndel
2010-03-23 23:12       ` [lm-sensors] [PATCH 2/4] hwmon: f71882fg: prepare for addition of Giel van Schijndel
2010-03-23 23:12       ` [PATCH 3/4] hwmon: f71882fg: add watchdog detection code Giel van Schijndel
2010-03-23 23:12         ` [lm-sensors] [PATCH 3/4] hwmon: f71882fg: add watchdog detection Giel van Schijndel
2010-03-23 23:12         ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Giel van Schijndel
2010-03-23 23:12           ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API Giel van Schijndel
2010-03-23 23:26           ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Giel van Schijndel
2010-03-23 23:26             ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Giel van Schijndel
2010-03-24  8:37           ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Hans de Goede
2010-03-24  8:37             ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Hans de Goede
2010-03-24  9:36             ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Giel van Schijndel
2010-03-24  9:36               ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Giel van Schijndel
2010-03-24 10:33               ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Hans de Goede
2010-03-24 10:33                 ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Hans de Goede
2010-03-24 15:35                 ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Giel van Schijndel
2010-03-24 15:35                   ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Giel van Schijndel
2010-03-24 15:51                   ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Alan Cox
2010-03-24 15:51                     ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Alan Cox
2010-03-24 16:20                     ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Hans de Goede
2010-03-24 16:20                       ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Hans de Goede
2010-03-24 20:35                       ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Giel van Schijndel
2010-03-24 20:35                         ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Giel van Schijndel
2010-04-25 21:20                         ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Jim Cromie
2010-04-25 21:20                           ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Jim Cromie
2010-03-25  8:54                     ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Giel van Schijndel
2010-03-25  8:54                       ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Giel van Schijndel
2010-03-25 10:40                       ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Giel van Schijndel
2010-03-25 10:40                         ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Giel van Schijndel
2010-03-25 12:50                         ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Alan Cox
2010-03-25 12:50                           ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Alan Cox
2010-03-25 13:06                           ` [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog API for F71808E and F71889 Hans de Goede
2010-03-25 13:06                             ` [lm-sensors] [PATCH 4/4] [RFC] hwmon: f71882fg: Add watchdog Hans de Goede
2010-03-25 13:17                           ` [PATCH 1/3] resource: shared I/O region support Giel van Schijndel
2010-03-25 13:17                             ` [lm-sensors] " Giel van Schijndel
2010-03-25 13:17                             ` [PATCH 2/3] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Giel van Schijndel
2010-03-25 13:17                               ` [lm-sensors] [PATCH 2/3] hwmon: f71882fg: use a muxed resource lock Giel van Schijndel
2010-03-25 13:17                               ` [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E Giel van Schijndel
2010-03-25 13:17                                 ` [lm-sensors] [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new watchdog Giel van Schijndel
2010-03-30  9:06                                 ` [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E Giel van Schijndel
2010-03-30  9:06                                   ` [lm-sensors] [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new Giel van Schijndel
2010-05-20  7:52                                   ` [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E Wim Van Sebroeck
2010-05-20  7:52                                     ` [lm-sensors] [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new Wim Van Sebroeck
2010-05-25 21:08                                     ` [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E Giel van Schijndel
2010-05-25 21:08                                       ` [lm-sensors] [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new Giel van Schijndel
2010-05-26  7:38                                       ` [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E Wim Van Sebroeck
2010-05-26  7:38                                         ` [lm-sensors] [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new Wim Van Sebroeck
2010-07-31 21:36                                         ` [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E Giel van Schijndel
2010-07-31 21:36                                           ` [lm-sensors] [PATCH 3/3] [RFC] watchdog: f71808e_wdt: new Giel van Schijndel
2010-03-25 21:10                               ` [PATCH 2/3] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Hans de Goede
2010-03-25 21:10                                 ` [lm-sensors] [PATCH 2/3] hwmon: f71882fg: use a muxed resource Hans de Goede
2010-04-25 10:35                               ` [PATCH 2/3] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Giel van Schijndel
2010-04-25 10:35                                 ` [lm-sensors] [PATCH 2/3] hwmon: f71882fg: use a muxed resource Giel van Schijndel
2010-07-31 21:21                                 ` [PATCH 2/3] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Giel van Schijndel
2010-07-31 21:21                                   ` [lm-sensors] [PATCH 2/3] hwmon: f71882fg: use a muxed resource Giel van Schijndel
2010-03-25 15:57                             ` [PATCH 1/3] resource: shared I/O region support Alan Cox
2010-03-25 15:57                               ` [lm-sensors] " Alan Cox
2010-03-25 18:03                               ` Giel van Schijndel
2010-03-25 18:03                                 ` [lm-sensors] " Giel van Schijndel
2010-03-25 18:16                                 ` Alan Cox
2010-03-25 18:16                                   ` [lm-sensors] " Alan Cox
2010-03-29  8:18                                   ` Giel van Schijndel
2010-03-29  8:18                                     ` [lm-sensors] " Giel van Schijndel
2010-03-29 16:07                                     ` Jesse Barnes
2010-03-29 16:07                                       ` [lm-sensors] " Jesse Barnes
2010-03-29 17:38                                       ` Giel van Schijndel
2010-03-29 17:38                                         ` [lm-sensors] " Giel van Schijndel
2010-03-29 17:44                                         ` Giel van Schijndel
2010-03-29 17:44                                           ` [lm-sensors] " Giel van Schijndel
2010-03-29 17:45                                         ` H. Peter Anvin
2010-03-29 17:45                                           ` [lm-sensors] " H. Peter Anvin
2010-03-29 18:06                                           ` Jesse Barnes
2010-03-29 18:06                                             ` [lm-sensors] " Jesse Barnes
2010-03-29 18:17                                             ` H. Peter Anvin
2010-03-29 18:17                                               ` [lm-sensors] " H. Peter Anvin
2010-03-29 18:29                                             ` Alan Cox
2010-03-29 18:29                                               ` [lm-sensors] " Alan Cox
2010-04-02 20:29                                               ` Jesse Barnes
2010-04-02 20:29                                                 ` [lm-sensors] " Jesse Barnes
2010-03-29 18:39                                           ` Alan Cox [this message]
2010-03-29 18:39                                             ` Alan Cox
2010-03-29 18:56                                             ` H. Peter Anvin
2010-03-29 18:56                                               ` [lm-sensors] " H. Peter Anvin
2010-03-29 17:59                                         ` Jesse Barnes
2010-03-29 17:59                                           ` [lm-sensors] " Jesse Barnes
2010-03-29 17:59                                         ` Jesse Barnes
2010-03-29 17:59                                           ` [lm-sensors] " Jesse Barnes
2010-03-24  8:26       ` [PATCH 2/4] hwmon: f71882fg: prepare for addition of watchdog support Hans de Goede
2010-03-24  8:26         ` [lm-sensors] [PATCH 2/4] hwmon: f71882fg: prepare for addition Hans de Goede
2010-03-24  8:36       ` [PATCH 2/4] hwmon: f71882fg: prepare for addition of watchdog support Hans de Goede
2010-03-24  8:36         ` [lm-sensors] [PATCH 2/4] hwmon: f71882fg: prepare for addition Hans de Goede
2010-03-24  8:25     ` [PATCH 1/4] [RFC] hwmon: f71882fg: Add support for the Fintek F71808E Hans de Goede
2010-03-24  8:25       ` [lm-sensors] [PATCH 1/4] [RFC] hwmon: f71882fg: Add support for Hans de Goede
2010-03-24  9:23       ` [PATCH 1/4] hwmon: f71882fg: Add support for the Fintek F71808E Giel van Schijndel
2010-03-24  9:23         ` [lm-sensors] [PATCH 1/4] hwmon: f71882fg: Add support for the Giel van Schijndel
2010-03-24 10:31         ` [PATCH 1/4] hwmon: f71882fg: Add support for the Fintek F71808E Hans de Goede
2010-03-24 10:31           ` [lm-sensors] [PATCH 1/4] hwmon: f71882fg: Add support for the Hans de Goede
2010-07-31 23:31           ` [PATCH 1/4] hwmon: f71882fg: Add support for the Fintek F71808E Giel van Schijndel
2010-07-31 23:31             ` [lm-sensors] [PATCH 1/4] hwmon: f71882fg: Add support for the Giel van Schijndel
2010-08-01  6:12             ` [PATCH 1/4] hwmon: f71882fg: Add support for the Fintek F71808E Hans de Goede
2010-08-01  6:12               ` [lm-sensors] [PATCH 1/4] hwmon: f71882fg: Add support for the Hans de Goede
2010-08-01 13:22               ` [PATCH 1/4] hwmon: f71882fg: Add support for the Fintek F71808E Giel van Schijndel
2010-08-01 13:22                 ` [lm-sensors] [PATCH 1/4] hwmon: f71882fg: Add support for the Giel van Schijndel
2010-08-01 13:30                 ` [PATCH] hwmon: f71882fg: Add support for the Fintek F71808E Giel van Schijndel
2010-08-01 13:30                   ` [lm-sensors] [PATCH] hwmon: f71882fg: Add support for the Fintek Giel van Schijndel
2010-08-04 11:36                   ` [PATCH] hwmon: f71882fg: Add support for the Fintek F71808E Hans de Goede
2010-08-04 15:44                     ` Giel van Schijndel
2010-08-13 10:56                       ` Hans de Goede
2010-08-13 10:56                         ` [lm-sensors] [PATCH] hwmon: f71882fg: Add support for the Hans de Goede
2010-08-10 19:11                     ` [PATCH] hwmon: f71882fg: Add support for the Fintek F71808E Giel van Schijndel
2010-08-10 19:11                       ` [lm-sensors] [PATCH] hwmon: f71882fg: Add support for the Giel van Schijndel
2010-08-13 10:01                       ` [PATCH] hwmon: f71882fg: Add support for the Fintek F71808E Hans de Goede
2010-08-13 10:01                         ` [lm-sensors] [PATCH] hwmon: f71882fg: Add support for the Hans de Goede
2010-08-18 18:24                         ` [PATCH] hwmon: f71882fg: Add support for the Fintek F71808E Andrew Morton
2010-08-18 18:24                           ` [lm-sensors] [PATCH] hwmon: f71882fg: Add support for the Andrew Morton
2010-08-22 18:04                           ` [PATCH] hwmon: f71882fg: Add support for the Fintek F71808E Hans de Goede
2010-08-22 18:04                             ` [lm-sensors] [PATCH] hwmon: f71882fg: Add support for the Hans de Goede
2010-08-22 18:28                             ` [PATCH] hwmon: f71882fg: Add support for the Fintek F71808E Giel van Schijndel
2010-08-22 18:28                               ` [lm-sensors] [PATCH] hwmon: f71882fg: Add support for the Giel van Schijndel
2010-08-01 13:30                 ` [PATCH 1/2] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Giel van Schijndel
2010-08-01 13:30                   ` [lm-sensors] [PATCH 1/2] hwmon: f71882fg: use a muxed resource lock Giel van Schijndel
2010-08-01 13:30                   ` [PATCH 2/2] watchdog: f71808e_wdt: new watchdog driver for Fintek F71808E and F71882FG Giel van Schijndel
2010-08-01 13:30                     ` Giel van Schijndel
2010-08-04 11:38                   ` [PATCH 1/2] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Hans de Goede
2010-10-02 22:59                     ` Giel van Schijndel
2010-10-02 22:59                       ` [lm-sensors] [PATCH 1/2] hwmon: f71882fg: use a muxed resource Giel van Schijndel
2010-10-03  1:06                       ` [PATCH 1/2] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Guenter Roeck
2010-10-03  1:06                         ` [lm-sensors] [PATCH 1/2] hwmon: f71882fg: use a muxed resource Guenter Roeck
2010-10-03  9:01                         ` [PATCH 1/2] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Jean Delvare
2010-10-03  9:01                           ` [lm-sensors] [PATCH 1/2] hwmon: f71882fg: use a muxed resource Jean Delvare
2010-10-03 12:09                         ` [PATCH] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Giel van Schijndel
2010-10-03 12:09                           ` [lm-sensors] [PATCH] hwmon: f71882fg: use a muxed resource lock for Giel van Schijndel
2010-10-03 13:31                           ` [PATCH] hwmon: f71882fg: use a muxed resource lock for the Super I/O port Guenter Roeck
2010-10-03 13:31                             ` [lm-sensors] [PATCH] hwmon: f71882fg: use a muxed resource lock Guenter Roeck
2010-03-23 23:01 ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Giel van Schijndel
2010-03-23 23:01   ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Giel van Schijndel
2010-03-24  8:14 ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Hans de Goede
2010-03-24  8:14   ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Hans de Goede
2010-03-24  8:46   ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Giel van Schijndel
2010-03-24  8:46     ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Giel van Schijndel
2010-03-24  9:09     ` [PATCH] hwmon: f71882fg: code cleanup Giel van Schijndel
2010-03-24  9:09       ` [lm-sensors] " Giel van Schijndel
2010-03-24 12:54       ` Jean Delvare
2010-03-24 12:54         ` [lm-sensors] " Jean Delvare
2010-03-24  9:09     ` [PATCH] hwmon: f71882fg: acquire I/O regions while we're working with them Giel van Schijndel
2010-03-24  9:09       ` [lm-sensors] [PATCH] hwmon: f71882fg: acquire I/O regions while Giel van Schijndel
2010-03-24  9:28     ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Jean Delvare
2010-03-24  9:28       ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Jean Delvare
2010-03-24  9:29 ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Jean Delvare
2010-03-24  9:29   ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Jean Delvare
2010-03-24  9:34   ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Giel van Schijndel
2010-03-24  9:34     ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Giel van Schijndel
2010-03-24 12:54     ` [PATCH] hwmon: f71882fg: properly acquire I/O regions while probing Jean Delvare
2010-03-24 12:54       ` [lm-sensors] [PATCH] hwmon: f71882fg: properly acquire I/O Jean Delvare

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