linux-kernel - Re: [rfc][patch 2/3] x86: fix IO write barriers

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Message-Id: <200710041953.16656.ak@suse.de>
Date:	Thu, 4 Oct 2007 19:53:16 +0200
From:	Andi Kleen <ak@...e.de>
To:	Dave Jones <davej@...hat.com>
Cc:	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [rfc][patch 2/3] x86: fix IO write barriers


> The only vendor that ever implemented OOSTOREs was Centaur, and they
> only did in the Winchip generation of the CPUs.  When they dropped it
> from the C3, I asked whether they intended to bring it back, and the
> answer was "extremely unlikely".
>

Do you know if it made a big performance difference?

But yes we should probably just remove this special case to make 
maintenance easier.

-Andi
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