linux-kernel - Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry

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Message-ID: <878wwrq6im.fsf@basil.nowhere.org>
Date:	Fri, 27 Jun 2008 16:47:29 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	Joerg Roedel <joerg.roedel@....com>, tglx@...utronix.de,
	mingo@...hat.com, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org, bhavna.sarathy@....com,
	Sebastian.Biemueller@....com, robert.richter@....com,
	joro@...tes.org
Subject: Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry

Adrian Bunk <bunk@...nel.org> writes:
>
> This tells neither what as IOMMU is nor whether my system actually has 
> one.
>
> Please shortly describe in the help text what an IOMMU is and which
> AMD systems have an IOMMU.
>
> The goal is that a system administrator building a kernel for his system 
> gets enough information for deciding whether to enable or disable this 
> option.

Also it should ideally describe that there is a trade off between
reliability and performance with IOMMU enabled.

-Andi
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