From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Wed, 10 Jan 2018 15:30:17 +0000 Subject: Re: [PATCH 27/33] dma-direct: use node local allocations for coherent memory Message-Id: <20180110153017.GD17790@lst.de> List-Id: References: <20180110080027.13879-1-hch@lst.de> <20180110080027.13879-28-hch@lst.de> <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> In-Reply-To: <3672aa56-b85c-5d2c-0c0e-709031b0c0a0-5wv7dgnIgG8@public.gmane.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Robin Murphy Cc: linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org, linux-ia64-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Guan Xuetao , Christoph Hellwig , linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-c6x-dev-jPsnJVOj+W6hPH1hqNUYSQ@public.gmane.org, linux-hexagon-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, Konrad Rzeszutek Wilk , linux-snps-arc-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-m68k-cunTk1MwBs8S/qaLPR03pWD2FQJk+8+b@public.gmane.org, patches-q3qR2WxjNRFS9aJRtSZj7A@public.gmane.org, linux-metag-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Michal Simek , linux-cris-kernel-VrBV9hrLPhE@public.gmane.org, linux-parisc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-alpha-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org On Wed, Jan 10, 2018 at 12:06:22PM +0000, Robin Murphy wrote: > On 10/01/18 08:00, Christoph Hellwig wrote: >> To preserve the x86 behavior. > > And combined with patch 10/22 of the SWIOTLB refactoring, this means > SWIOTLB allocations will also end up NUMA-aware, right? Great, that's what > we want on arm64 too :) Well, only for swiotlb allocations that can be satisfied by dma_direct_alloc. If we actually have to fall back to the swiotlb buffers there is not node affinity yet. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH 27/33] dma-direct: use node local allocations for coherent memory Date: Wed, 10 Jan 2018 16:30:17 +0100 Message-ID: <20180110153017.GD17790@lst.de> References: <20180110080027.13879-1-hch@lst.de> <20180110080027.13879-28-hch@lst.de> <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org, linux-ia64-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Guan Xuetao , Christoph Hellwig , linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-c6x-dev-jPsnJVOj+W6hPH1hqNUYSQ@public.gmane.org, linux-hexagon-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, Konrad Rzeszutek Wilk , linux-snps-arc-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-m68k-cunTk1MwBs8S/qaLPR03pWD2FQJk+8+b@public.gmane.org, patches-q3qR2WxjNRFS9aJRtSZj7A@public.gmane.org, linux-metag-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Michal Simek , linux-cris-kernel-VrBV9hrLPhE@public.gmane.org, linux-parisc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-alpha-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Robin Murphy Return-path: In-Reply-To: <3672aa56-b85c-5d2c-0c0e-709031b0c0a0-5wv7dgnIgG8@public.gmane.org> List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org On Wed, Jan 10, 2018 at 12:06:22PM +0000, Robin Murphy wrote: > On 10/01/18 08:00, Christoph Hellwig wrote: >> To preserve the x86 behavior. > > And combined with patch 10/22 of the SWIOTLB refactoring, this means > SWIOTLB allocations will also end up NUMA-aware, right? Great, that's what > we want on arm64 too :) Well, only for swiotlb allocations that can be satisfied by dma_direct_alloc. If we actually have to fall back to the swiotlb buffers there is not node affinity yet. From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965720AbeAJPaX (ORCPT + 1 other); Wed, 10 Jan 2018 10:30:23 -0500 Received: from verein.lst.de ([213.95.11.211]:47576 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933435AbeAJPaU (ORCPT ); Wed, 10 Jan 2018 10:30:20 -0500 Date: Wed, 10 Jan 2018 16:30:17 +0100 From: Christoph Hellwig To: Robin Murphy Cc: Christoph Hellwig , iommu@lists.linux-foundation.org, linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, Guan Xuetao , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, x86@kernel.org, Konrad Rzeszutek Wilk , linux-snps-arc@lists.infradead.org, linux-m68k@lists.linux-m68k.org, patches@groups.riscv.org, linux-metag@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Michal Simek , linux-parisc@vger.kernel.org, linux-cris-kernel@axis.com, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH 27/33] dma-direct: use node local allocations for coherent memory Message-ID: <20180110153017.GD17790@lst.de> References: <20180110080027.13879-1-hch@lst.de> <20180110080027.13879-28-hch@lst.de> <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Wed, Jan 10, 2018 at 12:06:22PM +0000, Robin Murphy wrote: > On 10/01/18 08:00, Christoph Hellwig wrote: >> To preserve the x86 behavior. > > And combined with patch 10/22 of the SWIOTLB refactoring, this means > SWIOTLB allocations will also end up NUMA-aware, right? Great, that's what > we want on arm64 too :) Well, only for swiotlb allocations that can be satisfied by dma_direct_alloc. If we actually have to fall back to the swiotlb buffers there is not node affinity yet. From mboxrd@z Thu Jan 1 00:00:00 1970 From: hch@lst.de (Christoph Hellwig) Date: Wed, 10 Jan 2018 16:30:17 +0100 Subject: [PATCH 27/33] dma-direct: use node local allocations for coherent memory In-Reply-To: <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> References: <20180110080027.13879-1-hch@lst.de> <20180110080027.13879-28-hch@lst.de> <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> List-ID: Message-ID: <20180110153017.GD17790@lst.de> To: linux-snps-arc@lists.infradead.org On Wed, Jan 10, 2018@12:06:22PM +0000, Robin Murphy wrote: > On 10/01/18 08:00, Christoph Hellwig wrote: >> To preserve the x86 behavior. > > And combined with patch 10/22 of the SWIOTLB refactoring, this means > SWIOTLB allocations will also end up NUMA-aware, right? Great, that's what > we want on arm64 too :) Well, only for swiotlb allocations that can be satisfied by dma_direct_alloc. If we actually have to fall back to the swiotlb buffers there is not node affinity yet. From mboxrd@z Thu Jan 1 00:00:00 1970 From: hch@lst.de (Christoph Hellwig) Date: Wed, 10 Jan 2018 16:30:17 +0100 Subject: [PATCH 27/33] dma-direct: use node local allocations for coherent memory In-Reply-To: <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> References: <20180110080027.13879-1-hch@lst.de> <20180110080027.13879-28-hch@lst.de> <3672aa56-b85c-5d2c-0c0e-709031b0c0a0@arm.com> Message-ID: <20180110153017.GD17790@lst.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Jan 10, 2018 at 12:06:22PM +0000, Robin Murphy wrote: > On 10/01/18 08:00, Christoph Hellwig wrote: >> To preserve the x86 behavior. > > And combined with patch 10/22 of the SWIOTLB refactoring, this means > SWIOTLB allocations will also end up NUMA-aware, right? Great, that's what > we want on arm64 too :) Well, only for swiotlb allocations that can be satisfied by dma_direct_alloc. If we actually have to fall back to the swiotlb buffers there is not node affinity yet.