From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754065Ab1JKJLz (ORCPT ); Tue, 11 Oct 2011 05:11:55 -0400 Received: from casper.infradead.org ([85.118.1.10]:39321 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753107Ab1JKJLv (ORCPT ); Tue, 11 Oct 2011 05:11:51 -0400 Subject: Re: [PATCH v2 0/3] Freezer, CPU hotplug, x86 Microcode: Fix task freezing failures From: Peter Zijlstra To: Borislav Petkov Cc: "Srivatsa S. Bhat" , Alan Stern , "rjw@sisk.pl" , "pavel@ucw.cz" , "len.brown@intel.com" , "tj@kernel.org" , "mingo@elte.hu" , "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" In-Reply-To: <20111010165343.GA29261@aftab> References: <4E931018.8030904@linux.vnet.ibm.com> <20111010165343.GA29261@aftab> Content-Type: text/plain; charset="UTF-8" Date: Tue, 11 Oct 2011 11:17:54 +0200 Message-ID: <1318324674.14400.73.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.32.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2011-10-10 at 18:53 +0200, Borislav Petkov wrote: > > 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? It can happen, therefore it will. We had better deal with it.