linux-kernel - Re: [PATCH 0/4, v3] Physical PCI slot objects

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Message-ID: <20071120020402.GA26446@srcf.ucam.org>
Date:	Tue, 20 Nov 2007 02:04:02 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Gary Hade <garyhade@...ibm.com>
Cc:	Alex Chiang <achiang@...com>, Matthew Wilcox <matthew@....cx>,
	gregkh@...e.de, kristen.c.accardi@...el.com, lenb@...nel.org,
	rick.jones2@...com, linux-kernel@...r.kernel.org,
	linux-pci@...ey.karlin.mff.cuni.cz, kaneshige.kenji@...fujitsu.com,
	pcihpd-discuss@...ts.sourceforge.net, linux-acpi@...r.kernel.org
Subject: Re: [PATCH 0/4, v3] Physical PCI slot objects

On Mon, Nov 19, 2007 at 03:32:25PM -0800, Gary Hade wrote:

> Alex, What I was trying to suggest is a boot-time kernel option, 
> not a kernel configuration option.  The basic idea is to give
> the user (with a single binary kernel) the ability to include
> your ACPI-PCI slot driver feature changes only when they are
> really needed.  In addition to reducing the number of
> system/PCI hotplug driver combinations where your changes
> would need to be validated, I believe would also help 
> alleviate other worries (e.g. Andi Kleen's memory consumption
> concern).  I believe this goal could also be achieved with the
> kernel config option by making the pci_slot module runtime
> loadable with the PCI hotplug drivers only visiting your new
> code when the pci_slot driver is loaded, although I think this
> would be more difficult to implement.

If we're compiling something into the kernel, the default behaviour 
should be for the functionality to be turned on unless the user 
overrides it.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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