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=-13.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 335B7C432C0 for ; Tue, 3 Dec 2019 23:02:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0475A20674 for ; Tue, 3 Dec 2019 23:02:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="BNICftiy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730323AbfLCWzL (ORCPT ); Tue, 3 Dec 2019 17:55:11 -0500 Received: from mail-wr1-f54.google.com ([209.85.221.54]:46888 "EHLO mail-wr1-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730113AbfLCWzK (ORCPT ); Tue, 3 Dec 2019 17:55:10 -0500 Received: by mail-wr1-f54.google.com with SMTP id z7so5971942wrl.13 for ; Tue, 03 Dec 2019 14:55:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=GKv6Mm1oz85heCcxK130gbYAevNbCAAFo+nBJ320s1k=; b=BNICftiyB/oLxgHMXNIUGC179kJaTeQbulvl6WzQhcI8i0uzniODhsbp0eKX4KLSQT fE3c9TXh8ohBAfJIE3gOEoo5ZuPfe5nVRunegE7Aq9WYZfaYNa6xjdWyzr1lp8AGgLcB pQyS5IBkpsyt001jdmv43DvfQhn5DK1MSpCqGI427MwHmd4pVnrcczftSnucXlORiG98 0tvLug0K8Jh5EaUC9ixBhFrDKZHBluYRObJNTgsRkkf1dMVvzHvVzNPsnXthoNVajTAe GMj6APWljeVrBBWjISPsNQPcM8wnNkZ3oneo8uzZ1w37Hc0iTQok6wlsFOn6lYCjGb+l TtCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=GKv6Mm1oz85heCcxK130gbYAevNbCAAFo+nBJ320s1k=; b=oyeTOM2HKnCnxlLT0a4f6k2kuhguwE7AbLNE4YesvZvXGzrQ/CIEzOZHvGcVFbZuNJ /WRwDnWvBhPbYPTY1+PZnYjLisu2wis4hiibDI9lYONwDgCD4TFw77yUKEDh7nCu3wvo KRtq38FyId9faFci/VRp4DF1xK5feJ22E00v1FN2LebFo07plhuFA+494x5w/S2IEIJa t+wMrb9bBbiXoKDPpxvG3W65+gHuf5R8GPijTzRwuFqmeIAKNRJChEwIMAgLyZelUByr eoLGSgaMWok7f/oke7kDdGqFA8VrI9+gzAPUtVKDOaTwSV/hRNrhBMph0YpPfZFw+CYK 0pNg== X-Gm-Message-State: APjAAAXm0xSZvZWb7qBX3exFdV1XfWqVYq1/UgSJF2L2bdka2/ENF6vq rsGNXHS+YJeZo4GlEQ9JyrTHWDBz8u4L3z3h1KuT2YWxzqo= X-Google-Smtp-Source: APXvYqz/yaUK9H5ybilnrmS7l7L78HL0CtSjXpdnZ1XepNXg6Ai6PoNKOjU9HdXw33maJhu5e6AjbsOCU6EdXe5MxOw= X-Received: by 2002:a5d:4b4e:: with SMTP id w14mr438283wrs.187.1575413708421; Tue, 03 Dec 2019 14:55:08 -0800 (PST) MIME-Version: 1.0 From: Xuewei Zhang Date: Tue, 3 Dec 2019 14:54:57 -0800 Message-ID: Subject: Request to backport 4929a4e6faa0 to stable tree To: stable@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org Hi Stable kernel maintainers, I want to backport below patch to stable tree: 4929a4e6faa0 sched/fair: Scale bandwidth quota and period without losing quota/period ratio precision This Email is to follow the option 2 [1] to submit patches to stable kernel. This patch is fixing a real bug affecting Kubernetes users [2]. The bug (2e8e19226398 sched/fair: Limit sched_cfs_period_timer() loop to avoid hard lockup) was backported to all stable versions. So we need this fix to be backported to all stable versions as well. Thanks! Xuewei [1] https://github.com/torvalds/linux/blob/master/Documentation/process/stable-kernel-rules.rst#option-2 [2] https://github.com/kubernetes/kubernetes/issues/72878