linux-kernel - Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in

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Message-ID: <20080129031804.GF20198@parisc-linux.org>
Date:	Mon, 28 Jan 2008 20:18:04 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Greg KH <greg@...ah.com>, Tony Camuso <tcamuso@...hat.com>,
	Grant Grundler <grundler@...isc-linux.org>,
	Loic Prylli <loic@...i.com>, Adrian Bunk <bunk@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	Jeff Garzik <jeff@...zik.org>,
	linux-pci@...ey.karlin.mff.cuni.cz, Martin Mares <mj@....cz>
Subject: Re: [Patch v2] Make PCI extended config space (MMCONFIG) a driver opt-in

On Mon, Jan 28, 2008 at 07:05:05PM -0800, Arjan van de Ven wrote:
> I think there's only one fundamental disagreement; and that is:
> do we think that things are now totally fixed and no new major issues
> will arrive after the "fix yet another mmconfig thing" patches are merged.
> 
> If the answer is no, then imho my patch is the right approach; it will limit the damage and doesn't make
> the people suffer who don't need extended config space.
> If the answer is yet, then my patch is not needed.
> 
> This is a judgment call; I'm skeptical, others are more optimistic that after 2 years of messing around
> they have finally found the last golden fix.

I'm more optimistic because we've so severely restricted the use of
mmconf after these patches that it's unlikely to cause problems.  I also
hear Vista is now using mmconf, so fewer implementations are going to
be buggy at this point.

-- 
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
--
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