From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757042Ab2JJTw1 (ORCPT ); Wed, 10 Oct 2012 15:52:27 -0400 Received: from mail-da0-f46.google.com ([209.85.210.46]:61333 "EHLO mail-da0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755640Ab2JJTwX (ORCPT ); Wed, 10 Oct 2012 15:52:23 -0400 Date: Thu, 11 Oct 2012 04:52:16 +0900 From: Greg Kroah-Hartman To: Steven Rostedt Cc: LKML , stable , Ben Hutchings , Mike Galbraith , Peter Zijlstra , Thomas Gleixner Subject: Re: stable backport: sched: Fix migration thread runtime bogosity Message-ID: <20121010195216.GA3928@kroah.com> References: <1349897043.24256.63.camel@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1349897043.24256.63.camel@gandalf.local.home> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 10, 2012 at 03:24:03PM -0400, Steven Rostedt wrote: > Greg, Ben, > > Can you add this commit to the stable branches. Without it, the > migration thread's accounting is just totally screwed up: > > By running a simple shell while loop along with a ps loop, top shows: > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 17 root RT 0 0 0 0 S 9999.0 0.0 9:27.50 migration/3 > 13 root RT 0 0 0 0 S 128.2 0.0 9:50.23 migration/2 > 2805 root 20 0 105m 1904 1416 S 13.9 0.1 0:06.69 bash > 4090 root 20 0 105m 1904 1416 S 2.0 0.1 0:00.90 bash > 2773 root 20 0 85484 3372 2620 S 0.3 0.2 0:00.03 sshd > > > For 3.4, the commit can be directly cherry picked: > > commit 8f6189684eb4e85e6c593cd710693f09c944450a > Author: Mike Galbraith > Date: Sat Aug 4 05:44:14 2012 +0200 > > sched: Fix migration thread runtime bogosity Now applied to 3.4-stable queue. greg k-h