From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: kexec/kdump of a kvm guest? Date: Thu, 24 Jul 2008 14:50:06 -0500 Message-ID: <4888DCEE.8090807@codemonkey.ws> References: <170fa0d20806261158me6f81d0p2ea4fa6b7e694a5a@mail.gmail.com> <486F58EC.6020408@qumranet.com> <170fa0d20807231713t19b5bd5bt5f418f509040b7aa@mail.gmail.com> <170fa0d20807240449n3e52c002qdb9c2626a192b0f1@mail.gmail.com> <20080724131552.GA22243@redhat.com> <170fa0d20807241203h7065b643k7df1187ef7e76f87@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Vivek Goyal , Alexander Graf , kexec@lists.infradead.org, kvm@vger.kernel.org, Avi Kivity , libvir-list@redhat.com To: Mike Snitzer Return-path: Received: from wr-out-0506.google.com ([64.233.184.228]:56264 "EHLO wr-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750857AbYGXTuo (ORCPT ); Thu, 24 Jul 2008 15:50:44 -0400 Received: by wr-out-0506.google.com with SMTP id 69so1947246wri.5 for ; Thu, 24 Jul 2008 12:50:43 -0700 (PDT) In-Reply-To: <170fa0d20807241203h7065b643k7df1187ef7e76f87@mail.gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: Mike Snitzer wrote: > On Thu, Jul 24, 2008 at 9:15 AM, Vivek Goyal wrote: > >> On Thu, Jul 24, 2008 at 07:49:59AM -0400, Mike Snitzer wrote: >> >>> On Thu, Jul 24, 2008 at 4:39 AM, Alexander Graf wrote: >>> > I can do further research but welcome others' insight: do others have > advice on how best to collect a crashed kvm guest's core? > I don't know what you do in libvirt, but you can start a gdbstub in QEMU, connect with gdb, and then have gdb dump out a core. Regards, Anthony Liguori >> It will be interesting to look at your results with 2.6.25.x kernels with >> kvm module inserted. Currently I can't think what can possibly be wrong. >> > > If the host's 2.6.25.4 kernel has both the kvm and kvm-intel modules > loaded kexec/kdump does _not_ work (simply hangs the system). If I > only have the kvm module loaded kexec/kdump works as expected > (likewise if no kvm modules are loaded at all). So it would appear > that kvm-intel and kexec are definitely mutually exclusive at the > moment (at least on both 2.6.22.x and 2.6.25.x). > > Mike > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >