Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753401AbbD0QsU (ORCPT ); Mon, 27 Apr 2015 12:48:20 -0400 Received: from resqmta-ch2-07v.sys.comcast.net ([69.252.207.39]:46741 "EHLO resqmta-ch2-07v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753016AbbD0QsS (ORCPT ); Mon, 27 Apr 2015 12:48:18 -0400 Date: Mon, 27 Apr 2015 11:48:16 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Rik van Riel cc: Jerome Glisse , "Paul E. McKenney" , Benjamin Herrenschmidt , linux-kernel@vger.kernel.org, linux-mm@kvack.org, jglisse@redhat.com, mgorman@suse.de, aarcange@redhat.com, airlied@redhat.com, aneesh.kumar@linux.vnet.ibm.com, Cameron Buschardt , Mark Hairgrove , Geoffrey Gerfin , John McKenna , akpm@linux-foundation.org Subject: Re: Interacting with coherent memory on external devices In-Reply-To: <553E6405.1060007@redhat.com> Message-ID: References: <20150424150829.GA3840@gmail.com> <20150424164325.GD3840@gmail.com> <20150424171957.GE3840@gmail.com> <20150424192859.GF3840@gmail.com> <20150425114633.GI5561@linux.vnet.ibm.com> <20150427154728.GA26980@gmail.com> <553E6405.1060007@redhat.com> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 565 Lines: 14 On Mon, 27 Apr 2015, Rik van Riel wrote: > Why would we want to avoid the sane approach that makes this thing > work with the fewest required changes to core code? Becaus new ZONEs are a pretty invasive change to the memory management and because there are other ways to handle references to device specific memory. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/