JimWright - I never did manage to reproduce your lockup using a VM, but I was able to do it on bare metal; a dual CPU 6 core machine (24 threads) with 16GB RAM. It took 48 instances of 'dd if=/dev/zero of=test.$i bs=1M count=512' over an NFS local mount to get it to lockup (after about 5 attempts). Nothing is leaping out at me in the dmesg. See attached.
** Attachment added: "dmesg.txt" https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/561210/+attachment/1532790/+files/dmesg.txt -- Writing big files to NFS target causes system lock up https://bugs.launchpad.net/bugs/561210 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs