linux-kernel - Re: [PATCH v2 04/10] drm/nouveau/fb: add GK20A support

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Message-ID: <53633A80.2040403@nvidia.com>
Date:	Fri, 2 May 2014 09:26:08 +0300
From:	Terje Bergström <tbergstrom@...dia.com>
To:	Alexandre Courbot <gnurou@...il.com>,
	Thierry Reding <thierry.reding@...il.com>
CC:	Alex Courbot <acourbot@...dia.com>,
	Ben Skeggs <bskeggs@...hat.com>,
	"nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 04/10] drm/nouveau/fb: add GK20A support

On 01.05.2014 07:49, Alexandre Courbot wrote:
> Agreed. Besides I hope the day won't come where we have to go through
> 2 layers of memory translation for the GPU...

That's actually the method of operation that gives us the best
performance. GPU likes big pages, and without IOMMU translation you'd
have a hard time finding enough contiguous physical memory.

Terje
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