Received: by 2002:a05:6a10:a841:0:0:0:0 with SMTP id d1csp1111878pxy; Thu, 22 Apr 2021 23:57:13 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzYpxT+q3bAy74McrQ7WO7upswyC8KN7bb2jAYpQ/g+B2tJcel3fSDbMLyOltc+G33Jo2yl X-Received: by 2002:a17:906:b7ce:: with SMTP id fy14mr2558529ejb.261.1619161033457; Thu, 22 Apr 2021 23:57:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1619161033; cv=none; d=google.com; s=arc-20160816; b=ipqg5kthhY/b4hAohBf3K5KbDB6oSixPG/r4Ow+ZLipyxMzS/5NVbD9njQHimNhdr4 7I1cdcloDzvilXWZKzaWJdnlb0olNAsbCdpV7bDQrTVIJphn7MMKelaakXt5c12lnzn5 fTRchmR999q/LzuVMsrGIWLSCapqFOfwKtci3LrghguCLfvLq28q3NlmmLMFcRBjfXQB jWxjl4ica/rEAM8crptco9e4/pFHJqqSmQHGTwvlRFZBLMYjrtCUtZz5ACcfFRjKs35r 3Q5+kQEc7JJIpen6PWWD/l0PKxqh03Qw3pljD/J96/pKtwnrYvkloks8tMrxmzN2U4LZ +Pdg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject:ironport-sdr:ironport-sdr; bh=L5jIocIG2qeu9V+3nG95nKiB5jrbBzUb5dGYasSXki0=; b=zMHbUtag6+H4J1seOOvpsH2VAlxsc1hp2RWMxszUthoRtzz65o6EuQ36V/HCIxGd0q KHCqiv8kxMq2dEL1SPiyYBGpO8K7QpaXZACWvIcx7fsfhppPwxTL1BTAp4Lepm51Lgyh PN7nRN6clWtk8Ma3c1NAt8MKrjv5wqy+/jKN8d7Bby/0b0VskGZhtMtTEkIubNby1u3W GvIEfoauSoTaLw5qLXphNPYB2sToQ6RFq+3Q0FDRN0W7ELppRsS6lKoBo0/gmQKfZ5tQ NcR3BBkZ0Gn9DTWZw8WX0Ln+A9LVJSzT3t2iuGWGr0WtUO09o/JXEkA9pdtSQxXrQcEP /RHg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id hb9si4261703ejb.304.2021.04.22.23.56.50; Thu, 22 Apr 2021 23:57:13 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236894AbhDWG43 (ORCPT + 99 others); Fri, 23 Apr 2021 02:56:29 -0400 Received: from mga12.intel.com ([192.55.52.136]:18564 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230131AbhDWG43 (ORCPT ); Fri, 23 Apr 2021 02:56:29 -0400 IronPort-SDR: gmOIab7+LyFG5YOuvNp1s6D1IzL7UGw5dErtTkdiCjGTFHscijqONGqU7Qoe9iCW6hYar2CJbF DoEeSQPcl1Mw== X-IronPort-AV: E=McAfee;i="6200,9189,9962"; a="175511556" X-IronPort-AV: E=Sophos;i="5.82,245,1613462400"; d="scan'208";a="175511556" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2021 23:55:52 -0700 IronPort-SDR: GCdFF6GP8kc2I/8Dxaz0fqjxv8x5uyyexAcSKSBZVk2aLiVYPPqaPy7zifFC/Gn8dvXYDQRfiC +EP4Cj09ndgQ== X-IronPort-AV: E=Sophos;i="5.82,245,1613462400"; d="scan'208";a="428272895" Received: from xingzhen-mobl.ccr.corp.intel.com (HELO [10.238.4.46]) ([10.238.4.46]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Apr 2021 23:55:48 -0700 Subject: Re: [RFC] mm/vmscan.c: avoid possible long latency caused by too_many_isolated() To: Hillf Danton Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, ying.huang@intel.com, tim.c.chen@linux.intel.com, Shakeel Butt , Michal Hocko , yuzhao@google.com, wfg@mail.ustc.edu.cn References: <20210416023536.168632-1-zhengjun.xing@linux.intel.com> <20210422102325.1332-1-hdanton@sina.com> From: Xing Zhengjun Message-ID: <2d254758-4e5c-5dbc-b939-0d1ca4be03a5@linux.intel.com> Date: Fri, 23 Apr 2021 14:55:46 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: <20210422102325.1332-1-hdanton@sina.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/22/2021 6:23 PM, Hillf Danton wrote: > Another option seems like we take a nap at the second time of lru tmi > with some allocators in your case served without the 100ms delay. Thanks, I will try it with my test cases. -- Zhengjun Xing