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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 298ABC433F5 for ; Wed, 12 Jan 2022 16:10:44 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9F7B96B018C; Wed, 12 Jan 2022 11:10:43 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9A6C26B018D; Wed, 12 Jan 2022 11:10:43 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 849336B018E; Wed, 12 Jan 2022 11:10:43 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0216.hostedemail.com [216.40.44.216]) by kanga.kvack.org (Postfix) with ESMTP id 57EF96B018C for ; Wed, 12 Jan 2022 11:10:43 -0500 (EST) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id DDAC7181E8E6B for ; Wed, 12 Jan 2022 16:10:42 +0000 (UTC) X-FDA: 79022123124.26.A6CC4DF Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) by imf26.hostedemail.com (Postfix) with ESMTP id 7C55214001D for ; Wed, 12 Jan 2022 16:10:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=/W8SEIIQmiWMQWtlkvLK99xQHSUvadSNsXTuHZvrmos=; b=f8KMzwOD3kOV6VI3KiODnTCYm/ FMuCvqr8/3+fj9J3+fFdI90hgqRo4MhbftFAbtdR7CQDeHAYj1sRNJyeEEGBkZYIkgboRA1D1GQo2 nRc4MxerBmw1rG5iWcoSDI7q+WXuoTjQinzK0W0CcXOdgMsu3deXmiy5qkVUTGGjUg3aOKg+8rUCv 79+m3fG8smp8TynImopDEk7ham1Z+NLH0NC9OwDT1LYqf/k1OGAjT22JxbLs4ncdzwAFQ+XPRKYxa yT6uzsdNllCJu2YnN9cOAcz35pYXXaqV3Ri8J3UFxZfYyvhjvpxluL+w1A3/ANCT7Ny0vlWEkNAUm vAopbPTA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1n7gCi-000pNZ-2J; Wed, 12 Jan 2022 16:10:28 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 882EA300237; Wed, 12 Jan 2022 17:10:23 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 703CE2133FEEB; Wed, 12 Jan 2022 17:10:23 +0100 (CET) Date: Wed, 12 Jan 2022 17:10:23 +0100 From: Peter Zijlstra To: Huang Ying Cc: Mel Gorman , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Feng Tang , Andrew Morton , Michal Hocko , Rik van Riel , Mel Gorman , Dave Hansen , Yang Shi , Zi Yan , Wei Xu , osalvador , Shakeel Butt , Hasan Al Maruf Subject: Re: [PATCH -V10 RESEND 0/6] NUMA balancing: optimize memory placement for memory tiering system Message-ID: References: <20211207022757.2523359-1-ying.huang@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211207022757.2523359-1-ying.huang@intel.com> X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 7C55214001D X-Stat-Signature: jskirtogbxymoc1irt6qfci4txj6ako9 Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=infradead.org header.s=desiato.20200630 header.b=f8KMzwOD; spf=none (imf26.hostedemail.com: domain of peterz@infradead.org has no SPF policy when checking 90.155.92.199) smtp.mailfrom=peterz@infradead.org; dmarc=none X-HE-Tag: 1642003841-941887 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 Tue, Dec 07, 2021 at 10:27:51AM +0800, Huang Ying wrote: > After commit c221c0b0308f ("device-dax: "Hotplug" persistent memory > for use like normal RAM"), the PMEM could be used as the > cost-effective volatile memory in separate NUMA nodes. In a typical > memory tiering system, there are CPUs, DRAM and PMEM in each physical > NUMA node. The CPUs and the DRAM will be put in one logical node, > while the PMEM will be put in another (faked) logical node. So what does a system like that actually look like, SLIT table wise, and how does that affect init_numa_topology_type() ?