Steve: Have you tested any trusty kernels newer than 3.13.0-8.28? Because starting with 3.13.0-9.29 there's a stable commit that seems like it's probably a fix for your problem.
commit 6b75686cac9eadd03ebc3b195bdd5bc03b50419a Author: Weston Andros Adamson <d...@netapp.com> Date: Tue Dec 17 12:16:11 2013 -0500 sunrpc: Fix infinite loop in RPC state machine -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1282302 Title: deadlock when unmounting nfs shares in trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1282302/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs