Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761261AbZATNFt (ORCPT ); Tue, 20 Jan 2009 08:05:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754776AbZATNFj (ORCPT ); Tue, 20 Jan 2009 08:05:39 -0500 Received: from mx2.redhat.com ([66.187.237.31]:36516 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754767AbZATNFj (ORCPT ); Tue, 20 Jan 2009 08:05:39 -0500 Message-ID: <4975CBF8.90101@redhat.com> Date: Tue, 20 Jan 2009 15:04:56 +0200 From: Avi Kivity User-Agent: Thunderbird 2.0.0.19 (X11/20090105) MIME-Version: 1.0 To: Kevin Shanahan CC: Ingo Molnar , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Kevin Shanahan , Mike Galbraith , Peter Zijlstra Subject: Re: [Bug #12465] KVM guests stalling on 2.6.28 (bisected) References: <1232410363.4768.21.camel@kulgan.wumi.org.au> <20090120113546.GA26571@elte.hu> <1232455343.4895.4.camel@kulgan.wumi.org.au> In-Reply-To: <1232455343.4895.4.camel@kulgan.wumi.org.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1920 Lines: 56 Kevin Shanahan wrote: > On Tue, 2009-01-20 at 12:35 +0100, Ingo Molnar wrote: > >> * Kevin Shanahan wrote: >> >> >>> On Mon, 2009-01-19 at 22:45 +0100, Rafael J. Wysocki wrote: >>> >>>> This message has been generated automatically as a part of a report >>>> of regressions introduced between 2.6.27 and 2.6.28. >>>> >>>> The following bug entry is on the current list of known regressions >>>> introduced between 2.6.27 and 2.6.28. Please verify if it still should >>>> be listed and let me know (either way). >>>> >>>> >>>> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12465 >>>> Subject : KVM guests stalling on 2.6.28 (bisected) >>>> Submitter : Kevin Shanahan >>>> Date : 2009-01-17 03:37 (3 days old) >>>> >>> Yes, please keep this on the list. >>> >> This only seems to occur under KVM, right? I.e. you tested it with -no-kvm >> and the problem went away, correct? >> > > Well, the I couldn't make the test conditions identical, but it the > problem didn't occur with the test I was able to do: > > http://marc.info/?l=linux-kernel&m=123228728416498&w=2 > > Can you also try with -no-kvm-irqchip? You will need to comment out the lines /* ISA IRQs map to GSI 1-1 except for IRQ0 which maps * to GSI 2. GSI maps to ioapic 1-1. This is not * the cleanest way of doing it but it should work. */ if (vector == 0) vector = 2; in qemu/hw/apic.c (should also fix -no-kvm smp). This will change kvm wakeups to use signals rather than the in-kernel code, which may be buggy. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/