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 00A62C38A2D for ; Wed, 26 Oct 2022 07:51:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3E7CE8E0002; Wed, 26 Oct 2022 03:51:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 36FFA8E0001; Wed, 26 Oct 2022 03:51:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1E99F8E0002; Wed, 26 Oct 2022 03:51:41 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 0C9398E0001 for ; Wed, 26 Oct 2022 03:51:41 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id C344216096D for ; Wed, 26 Oct 2022 07:51:40 +0000 (UTC) X-FDA: 80062331160.25.AE47D06 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf21.hostedemail.com (Postfix) with ESMTP id 36E2D1C0016 for ; Wed, 26 Oct 2022 07:51:40 +0000 (UTC) Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 29Q791Dk028237; Wed, 26 Oct 2022 07:51:26 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=pQJixVHnlAul0yFSM31Yvmc1HRdeg37EuUqq5B4xUPM=; b=GQYEuDNQIv8Lujd9toSQ/YuG+1uJiI1etr3dbEemHsirIHqfQoYLUM+pIIy268TijR72 EC9+nX5knhijqlrD7U1RDJXM8X0R2pb7mwqlxSy8x0oSPyLlxuE2KPeyhSoNT7CP8sAg mGKOEAIlpJ1h4kiC1j2EuXqY1T9HQIRawX8Z9Eh7mio1WY6A1GCGBlyCJTna0kR+SzAM ocsdLdypbrKb9xQDhYXI05h2sFek3poR1c4WQcjt99mWQktdOqN632YrtlyeDGliC8pW 0e/RVqgZm4ham6jAMf1ACkfCq/B3zWjuElOJEB6WDntv7TQ0eQWpAc941ZHxfcTHfKqA YA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3keydmtgd7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 26 Oct 2022 07:51:26 +0000 Received: from m0098404.ppops.net (m0098404.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 29Q79JxO029696; Wed, 26 Oct 2022 07:51:18 GMT Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3keydmtg37-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 26 Oct 2022 07:51:18 +0000 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 29Q7aTX5009020; Wed, 26 Oct 2022 07:49:56 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma02fra.de.ibm.com with ESMTP id 3kc859n2pb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 26 Oct 2022 07:49:56 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 29Q7iduQ50004356 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 26 Oct 2022 07:44:39 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BA255AE04D; Wed, 26 Oct 2022 07:49:53 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 123C5AE045; Wed, 26 Oct 2022 07:49:50 +0000 (GMT) Received: from [9.43.91.80] (unknown [9.43.91.80]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 26 Oct 2022 07:49:49 +0000 (GMT) Message-ID: Date: Wed, 26 Oct 2022 13:19:48 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [PATCH] mm/vmscan: respect cpuset policy during page demotion To: Feng Tang , Andrew Morton , Johannes Weiner , Michal Hocko , Tejun Heo , Zefan Li , Waiman Long , ying.huang@intel.com, linux-mm@kvack.org, cgroups@vger.kernel.org Cc: linux-kernel@vger.kernel.org, dave.hansen@intel.com, tim.c.chen@intel.com, fengwei.yin@intel.com References: <20221026074343.6517-1-feng.tang@intel.com> Content-Language: en-US From: Aneesh Kumar K V In-Reply-To: <20221026074343.6517-1-feng.tang@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: oic6vwOK7L-beMlcPWN6oX-I5j3-i7wh X-Proofpoint-ORIG-GUID: D6IPzMStnBp-wErhFNd0KS8OsdtP2c3z X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-26_03,2022-10-25_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 bulkscore=0 phishscore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1011 priorityscore=1501 adultscore=0 mlxlogscore=999 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210260041 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666770700; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=pQJixVHnlAul0yFSM31Yvmc1HRdeg37EuUqq5B4xUPM=; b=jIDO/di5RO+XyQvH+JI9HIz92uH7PNDfluUxg4oA8R6zHqHInOSw3Wxj4QxL76bXNSPbsD Vx1olONxnBRRIZd6kNKhxQ9hbk07xwn8VLYvEM2uItKKH7MwmGe+lce9oa/NdZ08+aSkOi TL/ch+1aaT35fGEKcyTGk2sGMyXw/Rk= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=GQYEuDNQ; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf21.hostedemail.com: domain of aneesh.kumar@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=aneesh.kumar@linux.ibm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666770700; a=rsa-sha256; cv=none; b=d/7fJKQBSKoVo/YbhYgnfjmCvgvl4xPC3BhQI1CBf3UsnU3+BkD9T1VnmskX1qo7rlGnMU B1h2pS37tyQ48GxUNEokDHBtYFVEPtdQDu/eTT509JCsVv4jPLjxjqkiDTUyWTTfMgzYcI 4LBIKQbd6KubCBaxjsRBuXENbHkLjAk= X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 36E2D1C0016 X-Rspam-User: Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=GQYEuDNQ; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf21.hostedemail.com: domain of aneesh.kumar@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=aneesh.kumar@linux.ibm.com X-Stat-Signature: snccttzqog6f48sr31a6jb5sztx756n7 X-HE-Tag: 1666770700-627122 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 10/26/22 1:13 PM, Feng Tang wrote: > In page reclaim path, memory could be demoted from faster memory tier > to slower memory tier. Currently, there is no check about cpuset's > memory policy, that even if the target demotion node is not allowd > by cpuset, the demotion will still happen, which breaks the cpuset > semantics. > > So add cpuset policy check in the demotion path and skip demotion > if the demotion targets are not allowed by cpuset. > What about the vma policy or the task memory policy? Shouldn't we respect those memory policy restrictions while demoting the page? -aneesh