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 4B69FC433EF for ; Thu, 2 Jun 2022 06:43:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DE5436B0073; Thu, 2 Jun 2022 02:43:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D94416B0074; Thu, 2 Jun 2022 02:43:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CA5686B0075; Thu, 2 Jun 2022 02:43:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id BC8D76B0073 for ; Thu, 2 Jun 2022 02:43:48 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay11.hostedemail.com (Postfix) with ESMTP id 8AED380563 for ; Thu, 2 Jun 2022 06:43:48 +0000 (UTC) X-FDA: 79532355336.13.C797D0C Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by imf03.hostedemail.com (Postfix) with ESMTP id 9664820009 for ; Thu, 2 Jun 2022 06:43:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1654152227; x=1685688227; h=message-id:subject:from:to:cc:date:in-reply-to: references:mime-version:content-transfer-encoding; bh=KUS8mVgdTc5Hj0xMVFCoSGE47Yrh0WZN2tGJ3zjuvKw=; b=hzTZ3u9GsTmsYyuh163FxdPBzhMd9oF3pDw+glNAueGM5IL4vBnl3WiZ 97kfya5ARYlY37SLQWKHh2vAXZxAIoV7oVYAJWN8DRokSn7lHNJX3wYNR xafr6VGEDhAgJWqKCAuCCDwrMjAzFV4/aMV7gs2iKoVdo3xaddiEJlkfj ZdL75sZLE0V5udHq6UdPEImtMBb0LMTg+oCn0FGtBywt9qIqk6939Hje9 YF/yIVL9VvL++3clXD+TVCbDWYUtpkp78rcKdXUPDnjfZzg1sOC0jpnla /STc0Bgn2NEMsXFItAEdP7NyZD571gj7o5pxXFLJaFrf98rg+E58JYD/d g==; X-IronPort-AV: E=McAfee;i="6400,9594,10365"; a="263479979" X-IronPort-AV: E=Sophos;i="5.91,270,1647327600"; d="scan'208";a="263479979" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2022 23:43:46 -0700 X-IronPort-AV: E=Sophos;i="5.91,270,1647327600"; d="scan'208";a="606683307" Received: from yanqingl-mobl1.ccr.corp.intel.com ([10.254.212.10]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2022 23:43:41 -0700 Message-ID: <2316b2f571cd812b5c2e4335c2ed51a227005098.camel@intel.com> Subject: Re: [RFC PATCH v4 6/7] mm/demotion: Add support for removing node from demotion memory tiers From: Ying Huang To: "Aneesh Kumar K.V" , linux-mm@kvack.org, akpm@linux-foundation.org Cc: Greg Thelen , Yang Shi , Davidlohr Bueso , Tim C Chen , Brice Goglin , Michal Hocko , Linux Kernel Mailing List , Hesham Almatary , Dave Hansen , Jonathan Cameron , Alistair Popple , Dan Williams , Feng Tang , Jagdish Gediya , Baolin Wang , David Rientjes Date: Thu, 02 Jun 2022 14:43:38 +0800 In-Reply-To: <20220527122528.129445-7-aneesh.kumar@linux.ibm.com> References: <20220527122528.129445-1-aneesh.kumar@linux.ibm.com> <20220527122528.129445-7-aneesh.kumar@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.38.3-1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Stat-Signature: ya5ywc7ban7chai4kddg1i7qimq9ikte Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=hzTZ3u9G; dmarc=pass (policy=none) header.from=intel.com; spf=none (imf03.hostedemail.com: domain of ying.huang@intel.com has no SPF policy when checking 134.134.136.20) smtp.mailfrom=ying.huang@intel.com X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 9664820009 X-HE-Tag: 1654152212-618510 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 Fri, 2022-05-27 at 17:55 +0530, Aneesh Kumar K.V wrote: > This patch adds the special string "none" as a supported memtier value > that we can use to remove a specific node from being using as demotion target. > > For ex: > :/sys/devices/system/node/node1# cat memtier > 1 > :/sys/devices/system/node/node1# cat ../../memtier/memtier1/nodelist > 1-3 > :/sys/devices/system/node/node1# echo none > memtier > :/sys/devices/system/node/node1# > :/sys/devices/system/node/node1# cat memtier > :/sys/devices/system/node/node1# cat ../../memtier/memtier1/nodelist > 2-3 > :/sys/devices/system/node/node1# Why do you need this? Do you have some real users? Best Regards, Huang, Ying [snip]