This is NOT fixed by 3.13.0-33.58. It continues to persist even with 3.13.0-65.106 (and 3.13.0-63.103).
I have around 10 VMs running but ONE in particular disconnects from the network every hour or so. I had this issue previously but it was initially gone on Ubuntu 14.04 LTS but had come back recently - perhaps some kernel regression ? dmesg shows [42524.196629] kvm: zapping shadow pages for mmio generation wraparound [42538.140013] br0: port 2(vnet0) entered learning state [42538.268017] br1: port 2(vnet1) entered learning state [42553.180008] br0: topology change detected, propagating [42553.180015] br0: port 2(vnet0) entered forwarding state [42553.308008] br1: topology change detected, propagating [42553.308014] br1: port 2(vnet1) entered forwarding state (and NIC connection is gone) It's not clear if this is just co-incidence or if this is a pointer to the issue. This VM is unusual in my VMs becuase it is the only one with 2 NIC connections to br1 and br0. All the others connect to just br0. Those others work OK. Happy to try suggestions to track this down. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1346917 Title: Using KSM on NUMA capable machines can cause KVM guest performance and stability issues To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1346917/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
