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=-13.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL 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 CA471C433EF for ; Tue, 7 Sep 2021 16:49:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC14D60E77 for ; Tue, 7 Sep 2021 16:49:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345126AbhIGQuh (ORCPT ); Tue, 7 Sep 2021 12:50:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344757AbhIGQug (ORCPT ); Tue, 7 Sep 2021 12:50:36 -0400 Received: from mail-lj1-x231.google.com (mail-lj1-x231.google.com [IPv6:2a00:1450:4864:20::231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 64EC6C061575 for ; Tue, 7 Sep 2021 09:49:29 -0700 (PDT) Received: by mail-lj1-x231.google.com with SMTP id l18so17550450lji.12 for ; Tue, 07 Sep 2021 09:49:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=5nQbyJjyzYh1VE9otVZMdrlw6C2fQU7LqiyZwWhRq8I=; b=NVUbyStWPnZEpGwewjJDKQ49JQ1jS7fdS4WFuuEXH6Ec+tgit3cI7Zx+/Nl++iF5/h Qroa/KSzykKZxvfQ+R+/dAb8gqDg23zNrJp5/uL3kPZ3d5bjwG3gngjjBm8D5vrFHGvs LlirBmpO4+IJRyplk8tRs13DQ9RKkOR3feokKnAQmxoGoUKXx54JLH55zKw7mFzh2qS5 X1ArRmg/W8oRHrwR2pL63LtrWLCLK+YitgQ7s3hhxfIpMpNW2nQXmSat6ET/kzbwL1bl K3Cj3YCHsKCd0FpU3XMY/KbyLnpMQ/ALHB6pCRJpfenplHLyqVheTimS207aLaqG568M suQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=5nQbyJjyzYh1VE9otVZMdrlw6C2fQU7LqiyZwWhRq8I=; b=D9Rte9AZ2vgTzb4/dMUL/2DLOiruJWfD5ELXbqsmPpi1bWxGqlYldciBf9a2wXeiA6 /Hfyq4T5bnir4WP87sUoRAL/jZiTzPoP6ZN1ouxRzuYoOaHBE4TjhcFLgeDQiJu4v4/D D+z5PUU1UUvGtFGUzpKG3FxxOE+CKSSHOKarJMfhl/MCPXHYipLuN0pKoTohWFn9aJ4D nxjI0DB+nsi9L7bca0cXpxzdgfg3J/ogNYxndOGU+wOyMcg5MEDUAkyg7Daw82eWfjwl mPP0fbvFV6DoTbmcVMiod99QEz+sc85NegETBOZSM2ySEtGSh+NLnmtI6o9peEaptFWi 5W5w== X-Gm-Message-State: AOAM532t5A1dxG6xbOfGwkOukizVEgpiay0lnw7IyVprcWj50SOqtqvy cD7IP5o4N/atMxSPaHit7b44Z0ES082TiNNtnQ5eLw== X-Google-Smtp-Source: ABdhPJx1Mt+rA644wmpE0Q8tfmC+UipX8VAbZfje8lUVW/KXdgSthvVRLWXGw5okBj0K1CCXiGTB+0bobPIsyklSCW8= X-Received: by 2002:a05:651c:1029:: with SMTP id w9mr15283815ljm.202.1631033367581; Tue, 07 Sep 2021 09:49:27 -0700 (PDT) MIME-Version: 1.0 References: <20210907150757.GE17617@xsang-OptiPlex-9020> In-Reply-To: From: Shakeel Butt Date: Tue, 7 Sep 2021 09:49:16 -0700 Message-ID: Subject: Re: [memcg] 0f12156dff: will-it-scale.per_process_ops -33.6% regression To: Linus Torvalds Cc: Jens Axboe , kernel test robot , Vasily Averin , 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, kernel test robot , "Huang, Ying" , Feng Tang , Zhengjun Xing Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 7, 2021 at 9:40 AM Linus Torvalds wrote: > > On Tue, Sep 7, 2021 at 8:46 AM Jens Axboe wrote: > > > > 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. > > We are worried about them. I'm considering reverting several of them > because I think the problems are > > (a) big > > (b) nontrivial > > and the patches clearly weren't ready and people weren't aware of this issue. > Sounds good to me. Please let me know which patches you are planning to revert. I will work on the followup to make those acceptable. thanks, Shakeel