From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: Tasks schedule/migration issue with CPU hotplug? Date: Thu, 08 Sep 2011 14:55:48 +0200 Message-ID: <1315486548.20256.4.camel@twins> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: TAO HU Cc: "yong.zhang0" , Ingo Molnar , linux-omap , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: linux-omap@vger.kernel.org On Thu, 2011-09-08 at 14:47 +0800, TAO HU wrote: > > We seems got a schedule/migration issue in a OMAP4430 dual-core system. > > The kernel base is 2.6.35.7 and we're using CFS. step 1, try with a kernel that isn't quite as fossilized (3.0 or even better 3.1-rc) step 2, if no luck, report that step 3, when sending email, 3a, don't wrap machine output 3b, include .config like things From mboxrd@z Thu Jan 1 00:00:00 1970 From: peterz@infradead.org (Peter Zijlstra) Date: Thu, 08 Sep 2011 14:55:48 +0200 Subject: Tasks schedule/migration issue with CPU hotplug? In-Reply-To: References: Message-ID: <1315486548.20256.4.camel@twins> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, 2011-09-08 at 14:47 +0800, TAO HU wrote: > > We seems got a schedule/migration issue in a OMAP4430 dual-core system. > > The kernel base is 2.6.35.7 and we're using CFS. step 1, try with a kernel that isn't quite as fossilized (3.0 or even better 3.1-rc) step 2, if no luck, report that step 3, when sending email, 3a, don't wrap machine output 3b, include .config like things From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932726Ab1IHM4J (ORCPT ); Thu, 8 Sep 2011 08:56:09 -0400 Received: from merlin.infradead.org ([205.233.59.134]:60169 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932642Ab1IHM4G convert rfc822-to-8bit (ORCPT ); Thu, 8 Sep 2011 08:56:06 -0400 Subject: Re: Tasks schedule/migration issue with CPU hotplug? From: Peter Zijlstra To: TAO HU Cc: Ingo Molnar , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap , "yong.zhang0" Date: Thu, 08 Sep 2011 14:55:48 +0200 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Mailer: Evolution 3.0.2- Message-ID: <1315486548.20256.4.camel@twins> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2011-09-08 at 14:47 +0800, TAO HU wrote: > > We seems got a schedule/migration issue in a OMAP4430 dual-core system. > > The kernel base is 2.6.35.7 and we're using CFS. step 1, try with a kernel that isn't quite as fossilized (3.0 or even better 3.1-rc) step 2, if no luck, report that step 3, when sending email, 3a, don't wrap machine output 3b, include .config like things