From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754303AbbDXOJQ (ORCPT ); Fri, 24 Apr 2015 10:09:16 -0400 Received: from resqmta-ch2-01v.sys.comcast.net ([69.252.207.33]:33129 "EHLO resqmta-ch2-01v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752331AbbDXOJO (ORCPT ); Fri, 24 Apr 2015 10:09:14 -0400 Date: Fri, 24 Apr 2015 09:09:12 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Austin S Hemmelgarn cc: Benjamin Herrenschmidt , "Paul E. McKenney" , Jerome Glisse , linux-kernel@vger.kernel.org, linux-mm@kvack.org, jglisse@redhat.com, mgorman@suse.de, aarcange@redhat.com, riel@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: <55390EE1.8020304@gmail.com> Message-ID: References: <20150421214445.GA29093@linux.vnet.ibm.com> <20150422000538.GB6046@gmail.com> <20150422131832.GU5561@linux.vnet.ibm.com> <1429756200.4915.19.camel@kernel.crashing.org> <55390EE1.8020304@gmail.com> Content-Type: TEXT/PLAIN; CHARSET=US-ASCII; FORMAT=flowed Content-ID: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 23 Apr 2015, Austin S Hemmelgarn wrote: > Looking at this whole conversation, all I see is two different views on how to > present the asymmetric multiprocessing arrangements that have become > commonplace in today's systems to userspace. Your model favors performance, > while CAPI favors simplicity for userspace. Oww. No performance just simplicity? Really? The simplification of the memory registration for Infiniband etc is certainly useful and I hope to see contributions on that going into the kernel.