From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: Re: [Android-virt] [PATCH v5 11/13] ARM: KVM: Support SMP hosts Date: Mon, 19 Dec 2011 15:45:28 +0000 Message-ID: <4EEF5C18.1060301@arm.com> References: <20111211102403.21693.6887.stgit@localhost> <20111211102529.21693.62306.stgit@localhost> <4EEED68D.5040307@virtualopensystems.com> <4EEF55EF.9050309@arm.com> <4EEF58A8.30004@virtualopensystems.com> <4EEF5A20.7060603@arm.com> <4EEF5B4D.70501@virtualopensystems.com> Mime-Version: 1.0 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: 8BIT Cc: Christoffer Dall , "tech@virtualopensystems.com" , "avi@redhat.com" , "android-virt@lists.cs.columbia.edu" , "kvm@vger.kernel.org" To: Antonios Motakis Return-path: Received: from service87.mimecast.com ([91.220.42.44]:59646 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750713Ab1LSPpb convert rfc822-to-8bit (ORCPT ); Mon, 19 Dec 2011 10:45:31 -0500 In-Reply-To: <4EEF5B4D.70501@virtualopensystems.com> Sender: kvm-owner@vger.kernel.org List-ID: On 19/12/11 15:42, Antonios Motakis wrote: > On 12/19/2011 04:40 PM, Christoffer Dall wrote: >> On Mon, Dec 19, 2011 at 10:37 AM, Marc Zyngier wrote: >>> On 19/12/11 15:30, Antonios Motakis wrote: >>>> On 12/19/2011 04:19 PM, Marc Zyngier wrote: >>>>> On 19/12/11 14:57, Christoffer Dall wrote: >>>>>> >>>>>> You should simply start booting a UP guest on an SMP host, see where >>>>>> it crashes and start tracking it down. >>>>> For the time being, I've yet to see UP guest crashing on SMP host. On >>>>> the model, that is... >>>>> >>>>> >>>> Last time I tried to run a guest in a 2 core model, it hanged and >>>> crashed after a while. Anyway, I will investigate. So I gather critical >>>> sections have been dealt with and it's just a matter of ironing bugs >>>> right now? >>> Depends when you tested. V4 was definitely unusable on SMP. >>> >>> With my patches merged in Christoffer's v5 release, the basics should be >>> covered (correct SMP setup in the boot-wrapper and KVM, MPIDR >>> virtualization). >>> >>> If you find any problem (and let's face it, I'm sure you will... ;-), >>> I'll be happy to investigate. >>> >> I had the guest boot process crash on a page fault on the v5 series. >> Consistently. I just didn't have time to investigate yet. > > I was also running v5, however I didn't record the exact crash behavior, > since I assumed I was having the same results as everyone. I will look > into it now. If you manage to find a way to reliably reproduce it, I really want help having it fixed ASAP. Kernel config and co much appreciated. M. -- Jazz is not dead. It just smells funny...