From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA3B4C43460 for ; Mon, 12 Apr 2021 07:19:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F7106121D for ; Mon, 12 Apr 2021 07:19:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236857AbhDLHUD (ORCPT ); Mon, 12 Apr 2021 03:20:03 -0400 Received: from mx2.suse.de ([195.135.220.15]:60764 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236851AbhDLHUC (ORCPT ); Mon, 12 Apr 2021 03:20:02 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 253BCAEB9; Mon, 12 Apr 2021 07:19:44 +0000 (UTC) Date: Mon, 12 Apr 2021 09:19:41 +0200 From: Oscar Salvador To: David Hildenbrand Cc: Dave Hansen , linux-mm@kvack.org, linux-kernel@vger.kernel.org, shy828301@gmail.com, weixugc@google.com, rientjes@google.com, ying.huang@intel.com, dan.j.williams@intel.com Subject: Re: [PATCH 03/10] mm/migrate: update node demotion order during on hotplug events Message-ID: <20210412071936.GA27818@linux> References: <20210401183216.443C4443@viggo.jf.intel.com> <20210401183221.977831DE@viggo.jf.intel.com> <20210409101400.GA32159@linux> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 09, 2021 at 08:59:21PM +0200, David Hildenbrand wrote: > The only way to add more System RAM is via add_memory() and friends like > add_memory_driver_managed(). These all require CONFIG_MEMORY_HOTPLUG. Yeah, my point was more towards whether PMEM can come in a way that it does not have to be hotplugged, but come functional by default (as RAM). But after having read all papers out there, I do not think that it is possible. -- Oscar Salvador SUSE L3