linux-kernel - Re: [lm-sensors] Could the k8temp driver be interfering with ACPI?

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Message-Id: <200704131218.44045.bjorn.helgaas@hp.com>
Date:	Fri, 13 Apr 2007 12:18:43 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Pavel Machek <pavel@....cz>, Chuck Ebbert <cebbert@...hat.com>,
	Rudolf Marek <r.marek@...embler.cz>,
	linux-acpi@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	lm-sensors@...sensors.org
Subject: Re: [lm-sensors] Could the k8temp driver be interfering with ACPI?

On Friday 02 March 2007 07:03, Jean Delvare wrote:
> ... The primary issue is the concurrent access
> to resources, which cause lots of trouble which are hard to investigate.
> If ACPI reserves the ports, then the SMBus or hardware monitoring
> drivers (or any other conflicting driver) will cleanly fail to load,
> which would be a move in the right direction. ...
> 
> So, can ACPI actually reserve the ports it accesses?

Sorry to join this discussion so late.

ACPI tells us the resources used by devices.  Today, we don't reserve
ACPI resources until a driver claims a device.  PCI does some sort of
reservation up front, before the driver claims devices.  Conceptually,
I think ACPI should do the same thing, and I don't think it's that
hard to do.

But breaking things like lmsensors would make the transition painful.

Bjorn
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