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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,UNPARSEABLE_RELAY autolearn=unavailable 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 8A446C10F12 for ; Mon, 15 Apr 2019 22:26:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 54B2820663 for ; Mon, 15 Apr 2019 22:26:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727784AbfDOW0q (ORCPT ); Mon, 15 Apr 2019 18:26:46 -0400 Received: from out30-131.freemail.mail.aliyun.com ([115.124.30.131]:59975 "EHLO out30-131.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726085AbfDOW0p (ORCPT ); Mon, 15 Apr 2019 18:26:45 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04420;MF=yang.shi@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0TPPhBLZ_1555367198; Received: from US-143344MP.local(mailfrom:yang.shi@linux.alibaba.com fp:SMTPD_---0TPPhBLZ_1555367198) by smtp.aliyun-inc.com(127.0.0.1); Tue, 16 Apr 2019 06:26:42 +0800 Subject: Re: [v2 PATCH 5/9] mm: vmscan: demote anon DRAM pages to PMEM node To: Dave Hansen , mhocko@suse.com, mgorman@techsingularity.net, riel@surriel.com, hannes@cmpxchg.org, akpm@linux-foundation.org, keith.busch@intel.com, dan.j.williams@intel.com, fengguang.wu@intel.com, fan.du@intel.com, ying.huang@intel.com, ziy@nvidia.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <1554955019-29472-1-git-send-email-yang.shi@linux.alibaba.com> <1554955019-29472-6-git-send-email-yang.shi@linux.alibaba.com> <0f4d092d-1421-7163-d937-f8aa681db594@linux.alibaba.com> <42f2a561-f675-14d7-8d4f-87acfe0a18e9@intel.com> From: Yang Shi Message-ID: <745e396c-d9e0-b222-acd4-2a586832878b@linux.alibaba.com> Date: Mon, 15 Apr 2019 15:26:33 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <42f2a561-f675-14d7-8d4f-87acfe0a18e9@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/15/19 3:14 PM, Dave Hansen wrote: > On 4/15/19 3:10 PM, Yang Shi wrote: >>> Also, I don't see anything in the code tying this to strictly demote >>> from DRAM to PMEM.  Is that the end effect, or is it really implemented >>> that way and I missed it? >> No, not restrict to PMEM. It just tries to demote from "preferred node" >> (or called compute node) to a memory-only node. In the hardware with >> PMEM, PMEM would be the memory-only node. > If that's the case, your patch subject is pretty criminal. :) Aha, s/PMEM/cpuless would sound guiltless.