Received: by 2002:a05:6a10:6744:0:0:0:0 with SMTP id w4csp4664210pxu; Tue, 13 Oct 2020 04:19:09 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwdfjPs38iMVqkTwuWu132yQpONf7gP81DjbX4sS2zcLCGvSkoGn4+tEiod6IQinowEmZS4 X-Received: by 2002:a50:cf0b:: with SMTP id c11mr18877535edk.87.1602587949242; Tue, 13 Oct 2020 04:19:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1602587949; cv=none; d=google.com; s=arc-20160816; b=VrhKN2/VEZujlUAk2WblzJKD4ynHKDK7VaA1Xs3T3cEyTdTf2wVPnqca0jXc5jFDSZ izqT2fDMrmUAfNBjCCUBBATCMGLnFQBNp/27dLahg9neehrDMd1BcoDIylgLh9nu3z5G Ox592JaTySgiknfX30vVlE2aZWQQ/kleUB0wxxgNYIoZAxVGlbzBLeSqCxd67BhLfGa5 YdDQrU1gts3AujBSYNw29a0E1uGfAphOH9Ht5eef+hEvyp0H+3nwwo2KHv0ErxCyMdLl o4VfkoH9jvbRhhSTqUEP6LZNNdBawk/H4oEvLP+q6H6itsT2v4l+dUurLj1j5vtRY3TT ticw== 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=YzN1A+768XvDtOVpHGMWpSbTXZHYMmjjHTS9VvdtZFs=; b=rj5cJU0p2MoJoLGfpwv3sz4Vgi54MDS9iccwcUNr1+dpZp8YKKjkSNNgCmsuExBXSM PVK/YROk2DGOXJql1GcmM8QVyuTnt6NfeIKOXmeDOXyi0use1/hAju49gs1FC1B7+yKG lj4GrOGf2xk/n/6JHsmZ2L8WW3SiD/2wpEqGFN52aLIFNNN8I/ftABP2oe3Mlok+NL4G 2fftgrPB3UBCIFUTEBrZs4iQTFjeiZW3Y/89Ic1e8tE7ecxcysr0yM7TXIKd+0bPVP7c moirZpHhn3Ahy8taYF1gcUIVKdNHYmgb1SENZy5H+OkF2PH3t063vkMCErUh9rgjbDb5 f2kA== 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 j10si2776120edt.142.2020.10.13.04.18.47; Tue, 13 Oct 2020 04:19:09 -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 S1728407AbgJMBrf (ORCPT + 99 others); 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