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=-2.2 required=3.0 tests=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 C0C0AC10F29 for ; Wed, 18 Mar 2020 19:22:26 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3613020768 for ; Wed, 18 Mar 2020 19:22:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3613020768 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48jKg36czWzDr0p for ; Thu, 19 Mar 2020 06:22:23 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=softfail (domain owner discourages use of this host) smtp.mailfrom=linux.com (client-ip=3.19.106.255; helo=gentwo.org; envelope-from=cl@linux.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.com Received: from gentwo.org (gentwo.org [3.19.106.255]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 48jKd8186SzDqvW for ; Thu, 19 Mar 2020 06:20:43 +1100 (AEDT) Received: by gentwo.org (Postfix, from userid 1002) id 5CF353EF51; Wed, 18 Mar 2020 19:20:41 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id 5AC813EF50; Wed, 18 Mar 2020 19:20:41 +0000 (UTC) Date: Wed, 18 Mar 2020 19:20:41 +0000 (UTC) From: Christopher Lameter X-X-Sender: cl@www.lameter.com To: Srikar Dronamraju Subject: Re: [PATCH v2 3/4] mm: Implement reset_numa_mem In-Reply-To: <20200318072810.9735-4-srikar@linux.vnet.ibm.com> Message-ID: References: <20200318072810.9735-1-srikar@linux.vnet.ibm.com> <20200318072810.9735-4-srikar@linux.vnet.ibm.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sachin Sant , Nathan Lynch , Michal Hocko , linux-mm@kvack.org, Kirill Tkhai , Mel Gorman , Andrew Morton , Bharata B Rao , linuxppc-dev@lists.ozlabs.org, Joonsoo Kim , Vlastimil Babka Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Wed, 18 Mar 2020, Srikar Dronamraju wrote: > For a memoryless or offline nodes, node_numa_mem refers to a N_MEMORY > fallback node. Currently kernel has an API set_numa_mem that sets > node_numa_mem for memoryless node. However this API cannot be used for > offline nodes. Hence all offline nodes will have their node_numa_mem set > to 0. However systems can themselves have node 0 as offline i.e That is a significant change to the basic assumptions for memory less nodes. Node 0 needed to have memory and processors. Not sure what else may break.