I observed this behaviour on a xen host running precise 12.04.2. Happened two times up to now with the ubuntu kernel 3.2.0-39-generic and xen 4.1.2. The machine was hosting a Ubuntu Linux 12.04.2 HVM and a Windows XP HVM. There was nothing suspicious in the log of the (Linux) guest.
Attached is the relevant part from the dom0 kernel log. ** Attachment added: "kernel log xen netback" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1171135/+attachment/3651288/+files/xen-netback-dmesg-2013-04-23.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1171135 Title: DomU causes 'Frag is bigger than frame' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1171135/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs