From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751782AbaCXDHx (ORCPT ); Sun, 23 Mar 2014 23:07:53 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:60280 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751191AbaCXDHw (ORCPT ); Sun, 23 Mar 2014 23:07:52 -0400 Message-ID: <532FA0E8.4050106@jp.fujitsu.com> Date: Mon, 24 Mar 2014 12:05:12 +0900 From: Hidetoshi Seto User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:24.0) Gecko/20100101 Thunderbird/24.0 MIME-Version: 1.0 To: CC: Fernando Luis Vazquez Cao , Tetsuo Handa , Frederic Weisbecker , Thomas Gleixner , Ingo Molnar , Peter Zijlstra , Andrew Morton , Arjan van de Ven , Oleg Nesterov Subject: [PATCH 0/2] nohz: fix idle accounting in NO_HZ kernels Content-Type: text/plain; charset="ISO-2022-JP" Content-Transfer-Encoding: 7bit X-SecurityPolicyCheck-GC: OK by FENCE-Mail Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, This patch set (based on v3.14-rc7) will fix an issue that idle/iowait of /proc/stat can go backward. Originally reported by Tetsuo and Fernando at last year, Mar 2013. Reviews are welcome. Thanks, H.Seto Hidetoshi Seto (2): nohz: use seqlock to avoid race on idle time stats nohz, procfs: introduce get_cpu_idle/iowait_time_coarse fs/proc/stat.c | 16 ++--- include/linux/tick.h | 5 ++ kernel/time/tick-sched.c | 171 ++++++++++++++++++++++++++++++++++++++++------ 3 files changed, 161 insertions(+), 31 deletions(-)