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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 64C87C38A2B for ; Sat, 18 Apr 2020 00:23:51 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 0D55920857 for ; Sat, 18 Apr 2020 00:23:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gs/7xHPE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0D55920857 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5EA498E0003; Fri, 17 Apr 2020 20:23:50 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 59BD58E0001; Fri, 17 Apr 2020 20:23:50 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4D7FB8E0003; Fri, 17 Apr 2020 20:23:50 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0006.hostedemail.com [216.40.44.6]) by kanga.kvack.org (Postfix) with ESMTP id 332DB8E0001 for ; Fri, 17 Apr 2020 20:23:50 -0400 (EDT) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id E2D64180ACF0E for ; Sat, 18 Apr 2020 00:23:49 +0000 (UTC) X-FDA: 76719077778.22.ant59_3e86e85d61b0d X-HE-Tag: ant59_3e86e85d61b0d X-Filterd-Recvd-Size: 3378 Received: from mail-il1-f194.google.com (mail-il1-f194.google.com [209.85.166.194]) by imf45.hostedemail.com (Postfix) with ESMTP for ; Sat, 18 Apr 2020 00:23:49 +0000 (UTC) Received: by mail-il1-f194.google.com with SMTP id u5so3949416ilb.5 for ; Fri, 17 Apr 2020 17:23:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=n2qLE2G8t+4kBjJT4y5Xe4DOkOSyCHux45pVS8x0Spg=; b=gs/7xHPEUNSHl0NwQVcWeBYp4sMe4h1lH2lSbTuiFVnnGLuKRkMowZlDEnZU/Y5W0o O2ai9DhGRW7EqjjCU3aLB7u40h8SGTMEcyxjrO1NrWl8d/tDfjnBa5VRLZUUneF0KFrd MF5VKfiAGYIYtQvI9DH5EvZi9N7QhAz4UGjeuQM95WfC8PmAO4BAX/iVPdnRctRZ5qYK I2YO0SbfNQZ4zHnX17FMMz3VZ2cFd5gykLPo7tzD0BeDAUhXV50WR2BoOMVcPeUcEceM u2t7qYPfNhmc40ZEBOWTf3NaOdTLq6Q4+7SpfbaqG5YEWo2xUJytpD5tF1kU3yQjM6oO kAKQ== 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=n2qLE2G8t+4kBjJT4y5Xe4DOkOSyCHux45pVS8x0Spg=; b=A9hNX4GEHqaJi8eLlNP35vq+a9Skmkl/BROZjL/XDd4t1fEdDQif+F4mIX8USnwgim lmp86OUOGElK/WsJaKUSBQ/JTk4N2nlsUVPm04EvjKZhW5MsLfdo24IbL+NS5+q1ocse dyieaPWouo35J//PKZwlUnRXTHoHGxs7Ht4T3Y7ZLHI7A4gNXuhlMkufCpZT+LUgCDb5 Tu4t5j7jMJtx2XGgCK4lW+DhFPeZb4JB7vKBAYxmyeUdQSju3+xzw+3gGKufoaYfINBS 7cgLTqL5dZC7RftSmOeTisyRzKH0FXG+xwssQw5d6hf1ElQ7MrNSBAlOXezz0qdqLKaW PBvQ== X-Gm-Message-State: AGi0PuY/gfqHUbv2oQ+iTZnrNISseqAi7/yMpbfiCagfl8hAZfYExDKx +C8oFNRfWqeLj3yz3wKT654oN1UzGgo0xUe24Dg= X-Google-Smtp-Source: APiQypIswlXVNlq/cTlU7RiOgAIJbXe1nMiEWPEeoDDeQYS1EtG0lCLMhAhpnCwo3bKYIoW08yEYlr+g5K/s6caFjfI= X-Received: by 2002:a92:9a4d:: with SMTP id t74mr6018056ili.168.1587169429042; Fri, 17 Apr 2020 17:23:49 -0700 (PDT) MIME-Version: 1.0 References: <20200412140427.6732-1-laoar.shao@gmail.com> <20200413193111.GA1559372@chrisdown.name> <20200414181921.GA1864550@chrisdown.name> In-Reply-To: <20200414181921.GA1864550@chrisdown.name> From: Yafang Shao Date: Sat, 18 Apr 2020 08:23:13 +0800 Message-ID: Subject: Re: [PATCH] mm, memcg: fix inconsistent oom event behavior To: Chris Down Cc: Johannes Weiner , Michal Hocko , Vladimir Davydov , Andrew Morton , Linux MM , Shakeel Butt , stable@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Apr 15, 2020 at 2:19 AM Chris Down wrote: > > To be clear, you're correct that this wasn't intended to result in any changes > on cgroup v1, so I'm not against the change. Especially for stable, though, I'd > like to understand what the real results and ramifications are here. As explained above, the user tool parsing memory.oom_control is affected by this behavioral change, and what's worse is there is no documentation on it. I'm not agaist it if we think that is not enough to cc:stable. Thanks Yafang