From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751722AbaEBGZy (ORCPT ); Fri, 2 May 2014 02:25:54 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:17951 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751387AbaEBGZw (ORCPT ); Fri, 2 May 2014 02:25:52 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Thu, 01 May 2014 23:20:13 -0700 Message-ID: <53633A80.2040403@nvidia.com> Date: Fri, 2 May 2014 09:26:08 +0300 From: =?UTF-8?B?VGVyamUgQmVyZ3N0csO2bQ==?= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: Alexandre Courbot , Thierry Reding CC: Alex Courbot , Ben Skeggs , "nouveau@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" , "linux-tegra@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH v2 04/10] drm/nouveau/fb: add GK20A support References: <1398060142-7937-1-git-send-email-acourbot@nvidia.com> <1398060142-7937-5-git-send-email-acourbot@nvidia.com> <20140422104052.GB22426@ulmo> <53572077.6090305@nvidia.com> <20140428114437.GK19455@ulmo> In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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