Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965283AbbDVBFN (ORCPT ); Tue, 21 Apr 2015 21:05:13 -0400 Received: from gate.crashing.org ([63.228.1.57]:39324 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965057AbbDVBFJ (ORCPT ); Tue, 21 Apr 2015 21:05:09 -0400 Message-ID: <1429664686.27410.84.camel@kernel.crashing.org> Subject: Re: Interacting with coherent memory on external devices From: Benjamin Herrenschmidt To: paulmck@linux.vnet.ibm.com Cc: Christoph Lameter , 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 Date: Wed, 22 Apr 2015 11:04:46 +1000 In-Reply-To: <20150422005757.GP5561@linux.vnet.ibm.com> References: <20150421214445.GA29093@linux.vnet.ibm.com> <1429663372.27410.75.camel@kernel.crashing.org> <20150422005757.GP5561@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.10-0ubuntu1~14.10.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1106 Lines: 31 On Tue, 2015-04-21 at 17:57 -0700, Paul E. McKenney wrote: > On Wed, Apr 22, 2015 at 10:42:52AM +1000, Benjamin Herrenschmidt wrote: > > On Tue, 2015-04-21 at 18:49 -0500, Christoph Lameter wrote: > > > On Tue, 21 Apr 2015, Paul E. McKenney wrote: > > > > > > > Thoughts? > > > > > > Use DAX for memory instead of the other approaches? That way it is > > > explicitly clear what information is put on the CAPI device. > > > > Care to elaborate on what DAX is ? > > I would like to know as well. My first attempt to Google got me nothing > but Star Trek. Is DAX the persistent-memory topic covered here? > > https://lwn.net/Articles/591779/ > https://lwn.net/Articles/610174/ > > Ben will correct me if I am wrong, but I do not believe that we are > looking for persistent memory in this case. Right, it doesn't look at all like what we want. Ben. -- 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/