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 7BBB7C433ED for ; Mon, 12 Apr 2021 07:19:47 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2BA6B6120B for ; Mon, 12 Apr 2021 07:19:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2BA6B6120B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 95E0C6B006E; Mon, 12 Apr 2021 03:19:46 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 90E396B0070; Mon, 12 Apr 2021 03:19:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7AE4C6B0071; Mon, 12 Apr 2021 03:19:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0168.hostedemail.com [216.40.44.168]) by kanga.kvack.org (Postfix) with ESMTP id 5D0256B006E for ; Mon, 12 Apr 2021 03:19:46 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 04A9318022CFF for ; Mon, 12 Apr 2021 07:19:46 +0000 (UTC) X-FDA: 78022865172.13.69752DE Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf13.hostedemail.com (Postfix) with ESMTP id B84EBE000111 for ; Mon, 12 Apr 2021 07:19:42 +0000 (UTC) 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) X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: B84EBE000111 X-Stat-Signature: 7ptb93m6mbu5nqoggpmpeemq3agmcyfu Received-SPF: none (suse.de>: No applicable sender policy available) receiver=imf13; identity=mailfrom; envelope-from=""; helo=mx2.suse.de; client-ip=195.135.220.15 X-HE-DKIM-Result: none/none X-HE-Tag: 1618211982-922369 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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