chris, Here is what you asked for, sorry for not getting it earlier.
I don't use virsh. This is how I started KVM to trigger the problem interactively (curses interface): kvm -drive file=/dev/raid/shared,media=disk,if=none,cache=none,aio=native,format=raw,id=hd0 -device virtio-blk-pci,drive=hd0 -smp 2 -m 1000 -netdev tap,ifname=vm_shared,script=no,downscript=no,id=eth0 -device virtio-net- pci,netdev=eth0,mac=52:54:00:12:34:58 -name shared -runas shared -curses fdisk -l Disk /dev/vda: 100 GiB, 107374182400 bytes, 209715200 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: AE4BDF3E-0B83-4C17-B104-A5139722F263 Device Start End Sectors Size Type /dev/vda1 2048 3905535 3903488 1.9G Linux swap /dev/vda2 3905536 209713151 205807616 98.1G Linux filesystem It hasn't happened in this particular VM since upping the RAM so the VM doesn't swap. My intention was to reproduce on non-production hardware, and then try different kernels, rule out LVM, virtio, etc. But I'm in the middle of a new assignment, I probably won't have time to do this myself before December. ** Attachment added: "/boot/config-3.16.0-4-amd64 for the VM in question" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1423672/+attachment/4518472/+files/config.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1423672 Title: ext4_mb_generate_buddy:756: group N, block bitmap and bg descriptor inconsistent: X vs Y To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1423672/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs