linux-kernel - Re: Intel IOMMU (and IOMMU for Virtualization) performances

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Message-ID: <873antuojg.fsf@basil.nowhere.org>
Date:	Wed, 04 Jun 2008 18:56:35 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	linux-kernel@...r.kernel.org, mgross@...ux.intel.com,
	linux-scsi@...r.kernel.org
Subject: Re: Intel IOMMU (and IOMMU for Virtualization) performances

FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> writes:
>
> I'm just interested in other people's opinions on IOMMU
> implementations, performances, possible future changes for performance
> improvement, etc.

I think using the bitmap is an excellent idea and your numbers look good. 
Do you have numbers on the memory consumption too?
Trading some memory for performance is ok for something as performance critical 
as the IOMMU. 

-Andi
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