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Date:	Tue, 20 Nov 2007 10:33:06 +0900
From:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
To:	Gary Hade <garyhade@...ibm.com>, Alex Chiang <achiang@...com>
Cc:	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,
	pcihpd-discuss@...ts.sourceforge.net, linux-acpi@...r.kernel.org
Subject: Re: [PATCH 0/4, v3] Physical PCI slot objects

Gary Hade ????????:
> On Sat, Nov 17, 2007 at 11:29:54AM -0700, Alex Chiang wrote:
>> Hi all,
>>
>> This is v3 of the pci_slot patch series.
>>
>> The major change is making the ACPI-PCI slot driver a Kconfig
>> option, as per the recommendations of others (Gary, Kenji-san).
> 
> 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.
> 

I agree to Gary very much.

Thanks,
Kenji Kaneshige



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