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=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 3169EC433EF for ; Tue, 7 Sep 2021 15:46:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0736A61052 for ; Tue, 7 Sep 2021 15:46:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345520AbhIGPr7 (ORCPT ); Tue, 7 Sep 2021 11:47:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345443AbhIGPr5 (ORCPT ); Tue, 7 Sep 2021 11:47:57 -0400 Received: from mail-io1-xd32.google.com (mail-io1-xd32.google.com [IPv6:2607:f8b0:4864:20::d32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DB25C061575 for ; Tue, 7 Sep 2021 08:46:51 -0700 (PDT) Received: by mail-io1-xd32.google.com with SMTP id n24so13445026ion.10 for ; Tue, 07 Sep 2021 08:46:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=KOaW/FCCd5buwlfP5a4DsuSQ73kD/Vso/w0Ibmi1QWs=; b=trxl2Q0AgXEgGSuVsVcwVos8iVsRbOqFhwP6lSEbDH3DcRMGczxJqG69+Jvh2+EZoy D4IpzXDZE2qLkNutqjb27b9WUAP0dD6dA+TWgzP6DzhOOgEt7Xd5x+YJdCsyODWyUTbN oi8fZfXdRpodTdVMpMuOHEb7CJkBW9Hp0KafdX/h4BELe9kjnXK8VHp+86OdHTuMvXsR RfK5Qv8i4XhtvA4vcaxnRo7ZG67wcfXIbn/lVrJb6elmExPXjPGFqrNY2QOHEuqAILee 8BeLUtbP6Qeyw2KILOFOysV0eFOs49bunaDkbTGtqEGnLmqP5qgd8p9vUYpjHN/+Yusq V9dQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=KOaW/FCCd5buwlfP5a4DsuSQ73kD/Vso/w0Ibmi1QWs=; b=k75Qf8Xr3K0O5FtrajoLSsM1YHKSdbxj5vNc+AwL6+AF+gneMCLalbBV3PINs3YInm vFXcRqY+dP0idSRjrwa8wKwMnHJCuODtS0rpNSgxtFBEeMtU/zztXBRJoCOYzy3IMCsc XZNtPzDDzxdgc3lK0UKIJ5tFQbzoJLOxvaXju5FBWgrngkVoMGqV/j27kuU0sC9rvCVO kpZ728Rq2BDRvTqH5Pa7cusWUcWMTuTlCrYp08+eVaYp9uCRAecwjtqC6U0oyD2JVlDF ycSRomKt/OaNc+Q8N1X7mvGfbKifSG0fv4qK2icQLUu+QyUwXyTxDsVQjhHmpOICadHo 9S8Q== X-Gm-Message-State: AOAM533mNxRss2m0XbTy7MxIJ0XtPmWKBASUb4G1W5V6rTQKNFOcxVC0 j7VHI389o+1il5Pd8LiE2tS0jQ== X-Google-Smtp-Source: ABdhPJyW27+nsg7UUUuGxvLDcGa8uhbDMWBuVd5rNReKESFV1Hv5d7Avf4J+QjwVv378Dkey2mK3ww== X-Received: by 2002:a6b:3b8c:: with SMTP id i134mr13773551ioa.29.1631029610543; Tue, 07 Sep 2021 08:46:50 -0700 (PDT) Received: from [192.168.1.30] ([207.135.234.126]) by smtp.gmail.com with ESMTPSA id f3sm7386308iow.3.2021.09.07.08.46.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 07 Sep 2021 08:46:49 -0700 (PDT) Subject: Re: [memcg] 0f12156dff: will-it-scale.per_process_ops -33.6% regression To: kernel test robot , Vasily Averin Cc: Linus Torvalds , Shakeel Butt , Alexander Viro , Alexey Dobriyan , Andrei Vagin , Borislav Petkov , Borislav Petkov , Christian Brauner , Dmitry Safonov <0x7f454c46@gmail.com>, "Eric W. Biederman" , Greg Kroah-Hartman , "H. Peter Anvin" , Ingo Molnar , "J. Bruce Fields" , Jeff Layton , Jiri Slaby , Johannes Weiner , Kirill Tkhai , Michal Hocko , Oleg Nesterov , Roman Gushchin , Serge Hallyn , Tejun Heo , Thomas Gleixner , Vladimir Davydov , Yutian Yang , Zefan Li , Andrew Morton , LKML , lkp@lists.01.org, lkp@intel.com, ying.huang@intel.com, feng.tang@intel.com, zhengjun.xing@linux.intel.com References: <20210907150757.GE17617@xsang-OptiPlex-9020> From: Jens Axboe Message-ID: Date: Tue, 7 Sep 2021 09:46:48 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210907150757.GE17617@xsang-OptiPlex-9020> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/7/21 9:07 AM, kernel test robot wrote: > > > Greeting, > > FYI, we noticed a -33.6% regression of will-it-scale.per_process_ops due to commit: > > > commit: 0f12156dff2862ac54235fc72703f18770769042 ("memcg: enable accounting for file lock caches") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master Are we at all worried about these? There's been a number of them reported, basically for all the accounting enablements that have been done in this merge window. When io_uring was switched to use accounted memory, we did a bunch of work to ameliorate the inevitable slowdowns that happen if you do repeated allocs and/or frees and have memcg accounting enabled. -- Jens Axboe