From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [kvm-devel] severe bug in 2.6.23+ kvm.git Date: Fri, 19 Oct 2007 17:13:37 +0200 Message-ID: <4718C9A1.3010703@qumranet.com> References: <47189371.7080104@de.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "kvm-devel@lists.sourceforge.net" , Linux-kernel@vger.kernel.org To: carsteno@de.ibm.com Return-path: In-Reply-To: <47189371.7080104@de.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org Carsten Otte wrote: > Hi list, > > we've experienced a severe bug in current kvm.git, that may have been > introduced to the git tree quite recently around last weekend. 2.6.23 > is broken, 2.6.23-rc8 works for us. The symptom is, that our operon > kvm test machine shredders its hard disk content to a state that is > not correctably by the file system checker. We use raid1 md mirrored > ext3 file systems on 4 sata hard disks on it, and we've verified > correct operation of the hardware via badblocks and memtest86. > The problem occurs even without kvm modules loaded, so the cause seems > to be something that Avi pulled elsewhere. Did anyone else experience > similar problems with the 2.6.23 based kvm tree? Does anyone have an > idea about a possible cause, which would help us debugging it? > > kvm.git is actually 2.6.24-rc, pulled from -linus at a random point in time, so it's not at all surprising if something is broken. One option is for you to pull -linus to get the latest and hopefully greatest and see if the bug is fixed. Another is to use the external module capability to build kvm.git against 2.6.23.1. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.