Same problem here on 2 VMs, appeared 4 times in one week. VMs are running Debian Jessie, on Debian wheezy hypervisors running ceph giant, libvirt 1.2.9-9~bpo70+1, qemu 1:2.1+dfsg-12~bpo70+1.
FS is ext4, using virtio and rbd with writeback. After first crash we upgraded kernel to 4.1.6-1~bpo8+1. But it crashed again next day :( Seems to be related to memory usage at least for last crash. Attached the trace. We added more memory to see if that helps to avoid triggering the bug. ** Attachment added: "kern.log with backtrace" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1423672/+attachment/4466843/+files/kern.log -- 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/ubuntu/+source/linux/+bug/1423672/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
