From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755044Ab1HOPyP (ORCPT ); Mon, 15 Aug 2011 11:54:15 -0400 Received: from mail-vw0-f46.google.com ([209.85.212.46]:46598 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755093Ab1HOPyM (ORCPT ); Mon, 15 Aug 2011 11:54:12 -0400 From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Andrew Morton , Anton Blanchard , Avi Kivity , Ingo Molnar , Lai Jiangshan , "Paul E . McKenney" , Paul Menage , Peter Zijlstra , Stephen Hemminger , Thomas Gleixner , Tim Pepper Subject: [PATCH 27/32] nohz/cpuset: Flush cputimes on procfs stat file read Date: Mon, 15 Aug 2011 17:52:24 +0200 Message-Id: <1313423549-27093-28-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1313423549-27093-1-git-send-email-fweisbec@gmail.com> References: <1313423549-27093-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When we read a process's procfs stat file, we need to flush the cputimes of the tasks running in nohz cpusets in case some childs in the thread group are running there. Signed-off-by: Frederic Weisbecker Cc: Andrew Morton Cc: Anton Blanchard Cc: Avi Kivity Cc: Ingo Molnar Cc: Lai Jiangshan Cc: Paul E . McKenney Cc: Paul Menage Cc: Peter Zijlstra Cc: Stephen Hemminger Cc: Thomas Gleixner Cc: Tim Pepper --- fs/proc/array.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/fs/proc/array.c b/fs/proc/array.c index 9b45ee8..20e1c75 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -397,6 +397,8 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, cutime = cstime = utime = stime = cputime_zero; cgtime = gtime = cputime_zero; + /* For thread group times */ + cpuset_nohz_flush_cputimes(); if (lock_task_sighand(task, &flags)) { struct signal_struct *sig = task->signal; -- 1.7.5.4