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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 92491C2D0DB for ; Tue, 28 Jan 2020 19:50:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4FB83206A2 for ; Tue, 28 Jan 2020 19:50:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cS2JBYW5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4FB83206A2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E29966B0003; Tue, 28 Jan 2020 14:50:38 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DDA906B0006; Tue, 28 Jan 2020 14:50:38 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D18986B0007; Tue, 28 Jan 2020 14:50:38 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0192.hostedemail.com [216.40.44.192]) by kanga.kvack.org (Postfix) with ESMTP id BC4626B0003 for ; Tue, 28 Jan 2020 14:50:38 -0500 (EST) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 7A006180AD801 for ; Tue, 28 Jan 2020 19:50:38 +0000 (UTC) X-FDA: 76428085356.22.wren98_588e75d51048 X-HE-Tag: wren98_588e75d51048 X-Filterd-Recvd-Size: 3112 Received: from mail-ed1-f65.google.com (mail-ed1-f65.google.com [209.85.208.65]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Tue, 28 Jan 2020 19:50:37 +0000 (UTC) Received: by mail-ed1-f65.google.com with SMTP id e10so15975681edv.9 for ; Tue, 28 Jan 2020 11:50:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc; bh=RBDS5DfLcc2yI5PgB6bzftsQMn699I2BHsh2EXRlHg0=; b=cS2JBYW5CwQhqxig+PO1Nr5ss7EA41uuvHPhYo/N94e8rwMJaNLm+xi0iFL5Tx6rsc FYlJtrePBM9cO44l9qUzNtiFPQ6PB0tFAmM4OwwuVkmoTUrQBsMXdLphOYzksn4bh+jp v0bl0EK8T1XG5hIrX2UP53ianZkhiAr6Q2GzJsUyQcP+a2wqiiBNK3zQVPwKmAOVi6XQ XpprS6YU91WKpv4mKOFMRF5MA3wj/+dTgyADjdJDM70TDKSZfvMLb5TWe8yNNd+pCus6 gQC04Y+VKliZH0Bpyb6kkHQgwUhCMkudriMT4VMjtuODeC605IHY7+PFtbQJ8WcTAko+ g8UQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=RBDS5DfLcc2yI5PgB6bzftsQMn699I2BHsh2EXRlHg0=; b=da6NxLROZjqd4Iip7LR2IPzHYo9smVPg2HMDMBvhLrNToO5svBHkSbOkYWLndBqFNl FSQb8WihZR6talQG2LCABdEoAHYsmo3SYETyhKgk8SpRN9d7JMm7CQHzcDHzEzc+GX/M lTUM0XfW1TP4lY+dVmHFi/Qv3+vmgkOWNrwHo0SKCIqOIe7evtWHhyhptd58X3NH5F0L vQtJ9rgTNwrzvIuahhVbz97sDRop/WMipwm6UeyH7HaI2S0KURs47AkuKmvUcPJXZQV6 q7i2wE9s7Y1u5khxjSk1cl7VsR1CJoOVGlawNJ5a60/svv8PAC9vw6aUrSdlIjUOKEJG o+bg== X-Gm-Message-State: APjAAAXZqQbB4ZW0n8bSlV2Ga/Ju6Y93yYyHkv6uw8Z5nEK6/W7tug2E tQ1cnu4ASsZI5NiBRL/QTRppgRM51pyPeQVnkPQ= X-Google-Smtp-Source: APXvYqzrAKYmrGkRVyrPn6TufRfZctT5jiTAYwW+zh0UqB5lFMNIqa01l4NIE/XoJmz/MRMReTdXPy7mZHSkIzIHg+g= X-Received: by 2002:a50:fc05:: with SMTP id i5mr2628987edr.343.1580241036676; Tue, 28 Jan 2020 11:50:36 -0800 (PST) MIME-Version: 1.0 From: Yang Shi Date: Tue, 28 Jan 2020 11:50:20 -0800 Message-ID: Subject: [LSF/MM/BPF TOPIC] Memory Tiering discussion To: lsf-pc@lists.linux-foundation.org, Linux MM , Michal Hocko , Dan Williams , Mel Gorman , Dave Hansen Cc: Yang Shi Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000148, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi folks, Since last year's LSF/MM we discussed about this topic and I posted my v3 patchset based on our discussion (https://lore.kernel.org/linux-mm/1560468577-101178-7-git-send-email-yang.shi@linux.alibaba.com/t/), but not too much feedback from the community. Then Dave posted his version (https://lore.kernel.org/linux-mm/c3d6de4d-f7c3-b505-2e64-8ee5f70b2118@intel.com/). Both posts share some basic idea and have arbitrary design choices as well. So I would like to discuss how we should move forward, what pieces we still miss, what we can combine, etc. Thanks, Yang