Looks like there are be two separate upstream bugs in here: one related to XFS (https://bugzilla.kernel.org/show_bug.cgi?id=43013) and one related to the e1000e module (apparently no upstream Bugzilla entry, though https://bugzilla.kernel.org/show_bug.cgi?id=14737 might be related). The latter bug affected me on my ThinkPad X61s and blacklisting e1000e "fixed" it.
I suggest that this bug be split into two accordingly. Please also file a report on the e1000e bug upstream. ** Bug watch added: Linux Kernel Bug Tracker #14737 http://bugzilla.kernel.org/show_bug.cgi?id=14737 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/887793 Title: Kworker constantly taking about 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/887793/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs