I'm not sure this is completely fixed. I saw the following which states 0.11 still has the issue. http://www.mail-archive.com/k...@vger.kernel.org/msg22891.html
The changelog for qemu-kvm doesn't make any mention of this bug either. I was doing ISO testing for http://iso.qa.ubuntu.com/qatracker/result/3238/41 and had 3 other ISO tests running at the same time. I specified ubuntuKarmic to libvirt, which uses virtio. While the other 3 ISO tests worked fine, the one I did without LVM had problems in mountall: mountall: Cancelled General error mounting filesystems. A maintenance shell will now be started. CONTROL-D will terminate this shell and re-try. This happened *after* I logged in as a regular user and the console kept alternating back and forth between the maintenance shell and the regular user shell. It was very confusing. I checked dmesg and the only interesting thing I saw was: [ 15.868803] JBD: barrier-based sync failed on vda1:8 - disabling barriers -- 2.6.31 guest vm's unable to use virtio https://bugs.launchpad.net/bugs/403215 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs