linux-kernel - Re: [PATCH v2 0/8] Improve performance of VM translation on x86

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Message-ID: <20121012151517.GC16230@one.firstfloor.org>
Date:	Fri, 12 Oct 2012 17:15:17 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Konrad Rzeszutek Wilk <konrad@...nel.org>
Cc:	Alexander Duyck <alexander.h.duyck@...el.com>, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, andi@...stfloor.org,
	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v2 0/8] Improve performance of VM translation on x86_64

> Could you also add  a blurb in the Documentation/< appropriate file
> for device driver writes> mentioning the usage of __pa_symbol is
> preferred?

Device driver writer's shouldn't use any of this anyways, they should always
use the PCI DMA APIs and never DMA to the stack or to static variables.

-Andi
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