Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933815AbbDVA6G (ORCPT ); Tue, 21 Apr 2015 20:58:06 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:42722 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933792AbbDVA6E (ORCPT ); Tue, 21 Apr 2015 20:58:04 -0400 Date: Tue, 21 Apr 2015 17:57:57 -0700 From: "Paul E. McKenney" To: Benjamin Herrenschmidt 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 Subject: Re: Interacting with coherent memory on external devices Message-ID: <20150422005757.GP5561@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20150421214445.GA29093@linux.vnet.ibm.com> <1429663372.27410.75.camel@kernel.crashing.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1429663372.27410.75.camel@kernel.crashing.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15042200-0009-0000-0000-00000A4577EF Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 972 Lines: 27 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. Thanx, Paul -- 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/