From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753335Ab1JJQx4 (ORCPT ); Mon, 10 Oct 2011 12:53:56 -0400 Received: from s15228384.onlinehome-server.info ([87.106.30.177]:46434 "EHLO mail.x86-64.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753196Ab1JJQxy (ORCPT ); Mon, 10 Oct 2011 12:53:54 -0400 Date: Mon, 10 Oct 2011 18:53:43 +0200 From: Borislav Petkov To: "Srivatsa S. Bhat" Cc: Alan Stern , "rjw@sisk.pl" , "bp@amd64.org" , "pavel@ucw.cz" , "len.brown@intel.com" , "tj@kernel.org" , "mingo@elte.hu" , "a.p.zijlstra@chello.nl" , "akpm@linux-foundation.org" , "suresh.b.siddha@intel.com" , "lucas.demarchi@profusion.mobi" , "rusty@rustcorp.com.au" , "rdunlap@xenotime.net" , "vatsa@linux.vnet.ibm.com" , "ashok.raj@intel.com" , "tigran@aivazian.fsnet.co.uk" , "tglx@linutronix.de" , "hpa@zytor.com" , "linux-pm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" Subject: Re: [PATCH v2 0/3] Freezer, CPU hotplug, x86 Microcode: Fix task freezing failures Message-ID: <20111010165343.GA29261@aftab> References: <4E931018.8030904@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4E931018.8030904@linux.vnet.ibm.com> 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 Mon, Oct 10, 2011 at 11:32:40AM -0400, Srivatsa S. Bhat wrote: > > The seems like entirely the wrong way to go about solving this problem. > > > > The kernel shouldn't be responsible for making hotplug stress tests > > exclusive with system sleep. Whoever is running those tests should be > > smart enough to realize what's wrong if system sleep interferes with a > > test. Yes, agreed. And more: I'm still trying to understand why a test case like that is relevant and needs to be fixed at all. Let me re-formulate the question: what real world scenario(s) does the case of hibernating _while_ off- and onlining cores cover? Or are you simply doing kernel resiliency testing and thought that offlining cores while hibernating might make sense? IOW, I still fail to see a strong reason for this needing fixing. Thanks. -- Regards/Gruss, Boris. Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach GM: Alberto Bozzo Reg: Dornach, Landkreis Muenchen HRB Nr. 43632 WEEE Registernr: 129 19551