From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: Linux 3.13: BUG: soft lockup - CPU#1 stuck for 22s! [qemu-kvm:2653] Date: Wed, 12 Mar 2014 15:08:32 +0100 Message-ID: <53206A60.4020900@redhat.com> References: <1394567978.2849.0@smtp.gmail.com> <1394568102.2849.1@smtp.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit To: "Jason S. Wagner" , kvm@vger.kernel.org, Thomas Sattler Return-path: Received: from mail-ea0-f175.google.com ([209.85.215.175]:45385 "EHLO mail-ea0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753969AbaCLOIh (ORCPT ); Wed, 12 Mar 2014 10:08:37 -0400 Received: by mail-ea0-f175.google.com with SMTP id d10so4980327eaj.34 for ; Wed, 12 Mar 2014 07:08:36 -0700 (PDT) In-Reply-To: <1394568102.2849.1@smtp.gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: Il 11/03/2014 21:01, Jason S. Wagner ha scritto: > Hi all, > > Over the weekend, Linux 3.13.6 was installed on my machine. When I > started gnome-boxes on Monday morning, my VM halted during boot. Only a > portion of the VESA BIOS init output was displayed on-screen before the > halt. Backtraces occasionally appeared in dmesg > (http://pastebin.com/uUiNLmJ6). Some other programs were prevented from > performing some tasks while the VM was running. > > While investigating, I was directed to an earlier KVM bug report > (https://lkml.org/lkml/2014/2/11/487). I downgraded to Linux 3.12.9 and > rebooted, and now my VM is starting. Unfortunately, I'm very new to > Linux, so I'm not sure what the next steps would be. Yeah, it's quite likely this is the issue you're facing. And the author of the report at http://www.spinics.net/lists/kvm/msg100196.html also told me privately that 64-bit kernel made it go away, so it's also likely to be the same thing. Thomas, do you also see a "soft lockup" message? Paolo