From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: -smp >=2 + -no-kvm-irqchip broken Date: Tue, 02 Feb 2010 19:56:42 +0100 Message-ID: <4B68756A.10300@siemens.com> References: <4B685301.8070302@siemens.com> <20100202163919.GF18094@redhat.com> <4B68559F.4010501@siemens.com> <20100202164755.GG18094@redhat.com> <4B68747E.2090808@siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: kvm To: Gleb Natapov Return-path: Received: from david.siemens.de ([192.35.17.14]:16305 "EHLO david.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756360Ab0BBS5A (ORCPT ); Tue, 2 Feb 2010 13:57:00 -0500 In-Reply-To: <4B68747E.2090808@siemens.com> Sender: kvm-owner@vger.kernel.org List-ID: Jan Kiszka wrote: > Gleb Natapov wrote: >> On Tue, Feb 02, 2010 at 05:41:03PM +0100, Jan Kiszka wrote: >>> Gleb Natapov wrote: >>>> On Tue, Feb 02, 2010 at 05:29:53PM +0100, Jan Kiszka wrote: >>>>> Hi, >>>>> >>>>> notice while testing v2 of my vcpu state series: Starting SMP guests >>>>> like Linux or Vista without in-kernel irqchip and with more than one CPU >>>>> make them lock up during boot (Vista) or spit out messages like >>>>> >>>>> udevd[112] trap invalid opcode ip:7fc434630950 sp:7fff3cd3fcb8 error:0 >>>>> in libc-2.9.so[7fc4345b2000+14f000] >>>>> >>>> Looks like interrupt is injected as exception. Can you try to bisect? >>> Already started (as low prio background task), first looking for a good >>> version. If you know a recent one, I'm a taker. >>> >> Nope, didn't try no kernel irqchip for a long time. > > Kernel plays the key role here, either kvm-kmod or actually the kvm > module: kvm-kmod-2.6.31.6 works, the 2.6.32 series and later do not. > Digging deeper... I take this back: It works for Linux guests, but Vista crashes also with old kvm-kmod. So there is no way around real debugging. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux