linux-kernel - Re: [PATCH] Enable pci=bfsort by default on future Dell systems

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Message-ID: <20101215025141.GA32334@auslistsprd01.us.dell.com>
Date:	Tue, 14 Dec 2010 20:51:41 -0600
From:	Matt Domsch <Matt_Domsch@...l.com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Narendra_K@...l.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, Jordan_Hargrave@...l.com,
	Charles_Rose@...l.com
Subject: Re: [PATCH] Enable pci=bfsort by default on future Dell systems

On Tue, Dec 14, 2010 at 01:12:43PM -0700, Matthew Wilcox wrote:
> Actually, how about we introduce a smaller patch that just makes
> bfsort the default for all machines with a BIOS date of 2011 or later?
> bfsort was what we always intended; it was unintentionally broken for,
> what, five years, and the only reason not to revert it was to not break
> setups that had come to rely on it.
> 
> So just make it the default for all future systems, no matter what
> manufacturer.

This approach would hit all systems that install a newly issued BIOS
after 2010, which could cause a change in behaviour for such systems.
I don't know how to get a "system manufactured" date or "system first
powered on" date generically (IIRC these might be exposed in
vendor-specific fields on Dell systems).

I'm not opposed, but it could result in a change of behavior for
still-maintained (as evidenced by newly issued BIOSes) systems.

-- 
Matt Domsch
Technology Strategist
Dell | Office of the CTO
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