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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 43D98C8303F for ; Tue, 13 Oct 2020 02:42:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0FF5220674 for ; Tue, 13 Oct 2020 02:42:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728415AbgJMBrf (ORCPT ); Mon, 12 Oct 2020 21:47:35 -0400 Received: from mga02.intel.com ([134.134.136.20]:29646 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728368AbgJMBre (ORCPT ); Mon, 12 Oct 2020 21:47:34 -0400 IronPort-SDR: Y4qO65T6j9DFybAYDbGDQwpyqGbSiQh8tCgyNze/vVyqjcO6wm/O0boZ/d1dajJaMw3nlQ0nWl ZdxJ+k5rMyxg== X-IronPort-AV: E=McAfee;i="6000,8403,9772"; a="152760954" X-IronPort-AV: E=Sophos;i="5.77,369,1596524400"; d="scan'208";a="152760954" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2020 18:47:34 -0700 IronPort-SDR: NivaALxhwUwXVU6Tez3xOeY5PWOijR8tdHQf73m+YW/dQS3N39irIv9e50gK4/xVuW3vG23CzI ZnrdX1H80+EQ== X-IronPort-AV: E=Sophos;i="5.77,369,1596524400"; d="scan'208";a="530193113" Received: from xingzhen-mobl.ccr.corp.intel.com (HELO [10.238.4.68]) ([10.238.4.68]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2020 18:47:32 -0700 Subject: Re: [LKP] [fs] b6509f6a8c: will-it-scale.per_thread_ops -12.6% regression To: Mel Gorman Cc: kernel test robot , Linus Torvalds , Maxim Levitsky , LKML , lkp@lists.01.org References: <20200706012029.GZ3874@shao2-debian> <6b301f34-f8fe-c626-e5e5-9af5c257c5c3@linux.intel.com> <20201012081825.GR3227@techsingularity.net> From: Xing Zhengjun Message-ID: <162fe30c-21cb-4d49-15f2-394d48f4cecd@linux.intel.com> Date: Tue, 13 Oct 2020 09:47:30 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.1 MIME-Version: 1.0 In-Reply-To: <20201012081825.GR3227@techsingularity.net> Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/12/2020 4:18 PM, Mel Gorman wrote: > On Mon, Oct 12, 2020 at 02:20:26PM +0800, Xing Zhengjun wrote: >> Hi Mel, >> >> It is a revert commit caused the regression, Do you have a plan to fix >> it? Thanks. I re-test it in v5.9-rc8, the regression still existed. >> > > The revert caused a *performance* regression but the original > performance gain caused a functional failure. The overall performance > should be unchanged. I have not revisited the topic since. > Thanks for the explanation. We will stop tracking it. -- Zhengjun Xing