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 autolearn=ham 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 986DDC10F14 for ; Thu, 11 Apr 2019 14:31:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4B2242184B for ; Thu, 11 Apr 2019 14:31:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B2242184B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9A4646B000D; Thu, 11 Apr 2019 10:31:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 954FC6B000E; Thu, 11 Apr 2019 10:31:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 844546B0010; Thu, 11 Apr 2019 10:31:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pf1-f197.google.com (mail-pf1-f197.google.com [209.85.210.197]) by kanga.kvack.org (Postfix) with ESMTP id 4A4706B000D for ; Thu, 11 Apr 2019 10:31:02 -0400 (EDT) Received: by mail-pf1-f197.google.com with SMTP id g1so4373257pfo.2 for ; Thu, 11 Apr 2019 07:31:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:subject:to:cc :references:from:openpgp:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=yhjYIG48cVO5bGgiCdjsBnBpIQv+u5j9xoBu5pG9Oeo=; b=YkdR7X4+v+8my4+Zm7PlyilDi/lo1V0jH6vqRSpqeBoP9Ga5lMHlTwyMJoqUfLDr3h UpJGM+GPg7tCKNvUEa4mDMXuyEduEKdKUHrkp95di9AKv8tv43A2bFDl9Qk+lx4AlKyl /HbU4XScf2wXU7Y5wio6WhrrQyuh0Nl5Vv40zQNi//+aH17slFkMAOSYK1p072HWeK7P NYHzKKBLKcwrBrbppsHlytYiEEzo5QzukzcXWhKZm4HSrHau5+U5psGvsuNClkOGi/r6 vpS2+SxGsKdgMjgXjHefrImYf4oxT8lxHJFw8MchXE2lmjRrNkt9taX2evbEtL0Iqnat zSxQ== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of dave.hansen@intel.com designates 134.134.136.24 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Gm-Message-State: APjAAAW6aM4hmYvhzR5kjkmT0fjauO/d9Mu2y8Yfuh2ZL70SUwxySYhx dwM7z8vHMAtXjSp5QY2dP6M/Xw1zPwHvlhp4dp8KqL2ddg2yUJFykyOiJFdnv/jyWvbH2Qqtq/K h7YQHNz+nYLyD7JUCF0RYEaVUP4kwZc1xuzBlQohAi5KcgPJdXU+Zkl3N5VPcxNnmQA== X-Received: by 2002:a65:6210:: with SMTP id d16mr45955141pgv.110.1554993061935; Thu, 11 Apr 2019 07:31:01 -0700 (PDT) X-Google-Smtp-Source: APXvYqxq5eAl7sH3pgwOwv3enljbWpmHW5VUqCH3uCStj8FHba7T4w7OTIhQBBAL8Bm/9FhP4T43 X-Received: by 2002:a65:6210:: with SMTP id d16mr45955065pgv.110.1554993061093; Thu, 11 Apr 2019 07:31:01 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1554993061; cv=none; d=google.com; s=arc-20160816; b=yj8E12KsBa7WWfuM8ntIbEyygbdC9kJOSf5Uyh9ULw4iRVkkH53teXO/gAkPzBhFYJ y61+94Ucc2CGkag9IgpYGJtNl/fhphM3+CQp/VPASYuRg1XicqRMgUbCsKWMV4fdaq7E 05Ri6AjRD30Yn5seJcjYXJM/MNEjA5T2nFcN71sQ4YvzbXwy8+YBEqSYTQaiQkvHB4cS YWvXtlpk1IbZ7fWZNo8BLDdXVrhbCQSfC5Nm8krQZ6V3Yfqw4s22DPkkxavFSm5QmdDN qcUufm4oOSS38OkIP5OseCSn9xKDpcLCMqtKnAqBa8UIQfJJSI86CU2EvE93Kd7C1hrs Zr6Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:autocrypt:openpgp:from:references:cc:to :subject; bh=yhjYIG48cVO5bGgiCdjsBnBpIQv+u5j9xoBu5pG9Oeo=; b=Fx3fyWwdsvyfUh+OASZaQfxJIaT7B2uKDR2IB0HhUKt2ItEiLYav1NQdo22w5J/mR2 0zOFgvtUX+3K4n+N4ML0hk1sBZkAByXf70InX439dN9Mvxdb+9PQ611kEqYxOEj2SWTj H/JqlcV/WSFFVlY7AcHfCm6P4Q1b1qnZmVHdD91KNnZoWXeXEwFuo2WqO1mrITcjpwg9 rRc+4gVsFYI6eqVTg7wVtemHQOcH4LuW5lD8w48pbig4aORhD82ZIWjNBinvVIY63vS7 3X7HVMizB6X9yqXomNkUw/3TCfCzucOCv31j4w2QLu3T3Jj8dHDBsPgEh5w88+btSJqo sKGg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of dave.hansen@intel.com designates 134.134.136.24 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from mga09.intel.com (mga09.intel.com. [134.134.136.24]) by mx.google.com with ESMTPS id h10si17348451pll.251.2019.04.11.07.31.00 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Apr 2019 07:31:01 -0700 (PDT) Received-SPF: pass (google.com: domain of dave.hansen@intel.com designates 134.134.136.24 as permitted sender) client-ip=134.134.136.24; Authentication-Results: mx.google.com; spf=pass (google.com: domain of dave.hansen@intel.com designates 134.134.136.24 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Apr 2019 07:31:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,337,1549958400"; d="scan'208";a="141895234" Received: from tqlu-mobl.amr.corp.intel.com (HELO [10.251.9.147]) ([10.251.9.147]) by orsmga003.jf.intel.com with ESMTP; 11 Apr 2019 07:31:00 -0700 Subject: Re: [v2 PATCH 5/9] mm: vmscan: demote anon DRAM pages to PMEM node To: Yang Shi , 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> From: Dave Hansen Openpgp: preference=signencrypt Autocrypt: addr=dave.hansen@intel.com; keydata= mQINBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABtEVEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gKEludGVsIFdvcmsgQWRkcmVzcykgPGRhdmUuaGFuc2VuQGludGVs LmNvbT6JAjgEEwECACIFAlQ+9J0CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEGg1 lTBwyZKwLZUP/0dnbhDc229u2u6WtK1s1cSd9WsflGXGagkR6liJ4um3XCfYWDHvIdkHYC1t MNcVHFBwmQkawxsYvgO8kXT3SaFZe4ISfB4K4CL2qp4JO+nJdlFUbZI7cz/Td9z8nHjMcWYF IQuTsWOLs/LBMTs+ANumibtw6UkiGVD3dfHJAOPNApjVr+M0P/lVmTeP8w0uVcd2syiaU5jB aht9CYATn+ytFGWZnBEEQFnqcibIaOrmoBLu2b3fKJEd8Jp7NHDSIdrvrMjYynmc6sZKUqH2 I1qOevaa8jUg7wlLJAWGfIqnu85kkqrVOkbNbk4TPub7VOqA6qG5GCNEIv6ZY7HLYd/vAkVY E8Plzq/NwLAuOWxvGrOl7OPuwVeR4hBDfcrNb990MFPpjGgACzAZyjdmYoMu8j3/MAEW4P0z F5+EYJAOZ+z212y1pchNNauehORXgjrNKsZwxwKpPY9qb84E3O9KYpwfATsqOoQ6tTgr+1BR CCwP712H+E9U5HJ0iibN/CDZFVPL1bRerHziuwuQuvE0qWg0+0SChFe9oq0KAwEkVs6ZDMB2 P16MieEEQ6StQRlvy2YBv80L1TMl3T90Bo1UUn6ARXEpcbFE0/aORH/jEXcRteb+vuik5UGY 5TsyLYdPur3TXm7XDBdmmyQVJjnJKYK9AQxj95KlXLVO38lcuQINBFRjzmoBEACyAxbvUEhd GDGNg0JhDdezyTdN8C9BFsdxyTLnSH31NRiyp1QtuxvcqGZjb2trDVuCbIzRrgMZLVgo3upr MIOx1CXEgmn23Zhh0EpdVHM8IKx9Z7V0r+rrpRWFE8/wQZngKYVi49PGoZj50ZEifEJ5qn/H Nsp2+Y+bTUjDdgWMATg9DiFMyv8fvoqgNsNyrrZTnSgoLzdxr89FGHZCoSoAK8gfgFHuO54B lI8QOfPDG9WDPJ66HCodjTlBEr/Cwq6GruxS5i2Y33YVqxvFvDa1tUtl+iJ2SWKS9kCai2DR 3BwVONJEYSDQaven/EHMlY1q8Vln3lGPsS11vSUK3QcNJjmrgYxH5KsVsf6PNRj9mp8Z1kIG qjRx08+nnyStWC0gZH6NrYyS9rpqH3j+hA2WcI7De51L4Rv9pFwzp161mvtc6eC/GxaiUGuH BNAVP0PY0fqvIC68p3rLIAW3f97uv4ce2RSQ7LbsPsimOeCo/5vgS6YQsj83E+AipPr09Caj 0hloj+hFoqiticNpmsxdWKoOsV0PftcQvBCCYuhKbZV9s5hjt9qn8CE86A5g5KqDf83Fxqm/ vXKgHNFHE5zgXGZnrmaf6resQzbvJHO0Fb0CcIohzrpPaL3YepcLDoCCgElGMGQjdCcSQ+Ci FCRl0Bvyj1YZUql+ZkptgGjikQARAQABiQIfBBgBAgAJBQJUY85qAhsMAAoJEGg1lTBwyZKw l4IQAIKHs/9po4spZDFyfDjunimEhVHqlUt7ggR1Hsl/tkvTSze8pI1P6dGp2XW6AnH1iayn yRcoyT0ZJ+Zmm4xAH1zqKjWplzqdb/dO28qk0bPso8+1oPO8oDhLm1+tY+cOvufXkBTm+whm +AyNTjaCRt6aSMnA/QHVGSJ8grrTJCoACVNhnXg/R0g90g8iV8Q+IBZyDkG0tBThaDdw1B2l asInUTeb9EiVfL/Zjdg5VWiF9LL7iS+9hTeVdR09vThQ/DhVbCNxVk+DtyBHsjOKifrVsYep WpRGBIAu3bK8eXtyvrw1igWTNs2wazJ71+0z2jMzbclKAyRHKU9JdN6Hkkgr2nPb561yjcB8 sIq1pFXKyO+nKy6SZYxOvHxCcjk2fkw6UmPU6/j/nQlj2lfOAgNVKuDLothIxzi8pndB8Jju KktE5HJqUUMXePkAYIxEQ0mMc8Po7tuXdejgPMwgP7x65xtfEqI0RuzbUioFltsp1jUaRwQZ MTsCeQDdjpgHsj+P2ZDeEKCbma4m6Ez/YWs4+zDm1X8uZDkZcfQlD9NldbKDJEXLIjYWo1PH hYepSffIWPyvBMBTW2W5FRjJ4vLRrJSUoEfJuPQ3vW9Y73foyo/qFoURHO48AinGPZ7PC7TF vUaNOTjKedrqHkaOcqB185ahG2had0xnFsDPlx5y Message-ID: Date: Thu, 11 Apr 2019 07:31:00 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <1554955019-29472-6-git-send-email-yang.shi@linux.alibaba.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit 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 4/10/19 8:56 PM, Yang Shi wrote: > include/linux/gfp.h | 12 ++++ > include/linux/migrate.h | 1 + > include/trace/events/migrate.h | 3 +- > mm/debug.c | 1 + > mm/internal.h | 13 +++++ > mm/migrate.c | 15 ++++- > mm/vmscan.c | 127 +++++++++++++++++++++++++++++++++++------ > 7 files changed, 149 insertions(+), 23 deletions(-) Yikes, that's a lot of code. And it only handles anonymous pages? 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?