Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933539AbdC3MeW (ORCPT ); Thu, 30 Mar 2017 08:34:22 -0400 Received: from mout.gmx.net ([212.227.15.18]:55203 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932921AbdC3MeV (ORCPT ); Thu, 30 Mar 2017 08:34:21 -0400 Message-ID: <1490877219.4702.23.camel@gmx.de> Subject: Re: [BUG nohz]: wrong user and system time accounting From: Mike Galbraith To: Wanpeng Li Cc: Rik van Riel , Luiz Capitulino , Frederic Weisbecker , "linux-kernel@vger.kernel.org" , Peter Zijlstra , Thomas Gleixner Date: Thu, 30 Mar 2017 14:33:39 +0200 In-Reply-To: References: <20170323165512.60945ac6@redhat.com> <1490636129.8850.76.camel@redhat.com> <20170328132406.7d23579c@redhat.com> <20170329131656.1d6cb743@redhat.com> <1490818125.28917.11.camel@redhat.com> <1490848051.4167.57.camel@gmx.de> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.16.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:QKQ2c0eqb4nX+XOBxX4msfhffFeuYzolT7HfayuR/vvwJKt/wHT PGHefuvdajI6TTel8lKyoRktUpYIvVrfPRBDLuCChKBH5EyR+BYMRabcN/qAWioL20uDFsP gTlfuilZ5ESky1QlbcwUDas6YULw3BHNCdhG0JoksY88f2qBCPWSEoe6QKvPwaAkvq9OMc/ +dumN69oMOfl48q6SSyJw== X-UI-Out-Filterresults: notjunk:1;V01:K0:BS0qO2su5KY=:SdNzk0diM3QOjI6Q1WajQF T+rYeGX9JoszGo/GfGofgWa14GAUZZ6SnqWLVRnf3YC6IvcypBNoqDxjMg0JJYrYNBsZPkY/M 4GEXuEVmg1pLIqXDVnlE6HN762Pix0GDO7v+SMXWQKZNxlHKSzoBU79u8RUaql3156XaEWyrJ G67Kdjv3v5MTs1cxNXJ1/pLgcgsHC2J1Giu5FixbqJB8hNMtWbFs2bX2Q65VaZhgvwdT66ArB q4fTmv9MoEPquMLLoyx3vjmW/QRPPrHNPpNuayBmXtO15UlJ827vbezJiU7uVncghl9ksTBoN pB+eZqAqO1c7IaEuKKjpbcpim3m4VCblm2gi/EwkF8/ZR7Qa10KBbWMH7vTPcaMqqMSTWhsXp OzYlxwNozcc6jj8uC9cX7G6H7wzP2ocNWAfkdRI7tOwL1xweLxeURSmVdZ20hPQaEJvVnI88W nFh/TiCNhayuxtrwrA+532Q/ze7nvktV6L8/dpwmE9ugPApeDtoBzKuD3DOcQsovyCmQodM3T 84CTKUDuAPcvTW/yB4G7eUReVMUIb3ZSf/ymm3XM5yEMZ3uIJr6ZRET+XPF9EDjLYQWxMVumT tDIquZ8vA7skutZaxaXOhumMOdoIm4QVslXwSa1NnTKr/QzYlMJaMfX8yXAAht0utTQ6CSL6k 6b3u/L3Sxtn7uczEjsJKuodSokhmz0BFtg8URYeVeEXOkxqjmdPFsOt9LLBf2GqqdOxG3l3aZ ysM0EQkWdY/Wjsb0yFTdU6tIGnKbzAPJEgUFQoLQH/pBNpcB0yYsGEtCiBPQC5ItEMniiHl5g KuEVabe Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 256 Lines: 8 On Thu, 2017-03-30 at 19:52 +0800, Wanpeng Li wrote: > If we should just add random offset to the cpu in the nohz_full mode? Up to you, whatever works best. I left the regular skew alone, just added some noise to scheduler_tick_max_deferment(). -Mike