[Bug 1325560] Re: kvm vm loses network connectivity under enough load

2014-06-03 Thread Izhar ul Hassan
I changed the VM interface from virtio to e1000 and then I do not get this problem and the job finishes perfectly fine. Although e1000 may not be the best solution but at least it doesnt break my setup. -- You received this bug notification because you are a member of Ubuntu Server Team, which

[Bug 1325560] Re: kvm vm loses network connectivity under enough load

2014-06-03 Thread Serge Hallyn
Thanks - both of those seem to suggest there is a bug in the virtio driver in the guest kernel. Are the guests in both cases on the same release and same kernel? ** Also affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a

[Bug 1325560] Re: kvm vm loses network connectivity under enough load

2014-06-03 Thread Izhar ul Hassan
yes, i've used the same virtual machines in both cases. everything is the same except the driver. I switch from virtio to e1000 glance image-update --property hw_vif_model=e1000 image-id Now I relaunch the virtual cluster and everything works perfectly fine. I've tested with 5 times the load

[Bug 1325560] Re: kvm vm loses network connectivity under enough load

2014-06-03 Thread Izhar ul Hassan
@Brad I have already sent the apport-collect from the host machine. I am not sure if I could apport-collect from the guest vm because on the guest I cannot access any network unless I restart the VM. -- You received this bug notification because you are a member of Ubuntu Server Team, which is

[Bug 1325560] Re: kvm vm loses network connectivity under enough load

2014-06-02 Thread Izhar ul Hassan
** Also affects: qemu Importance: Undecided Status: New ** Also affects: libvirt Importance: Undecided Status: New ** No longer affects: qemu ** Also affects: linux Importance: Undecided Status: New -- You received this bug notification because you are a member

[Bug 1325560] Re: kvm vm loses network connectivity under enough load

2014-06-02 Thread Izhar ul Hassan
apport information ** Tags added: apport-collected precise third-party-packages ** Description changed: Networking breaks after awhile in kvm guests using virtio networking. We run data intensive jobs on our virtual cluster (OpenStack Grizzly Installed on Ubuntu 12.04 Server). The job

[Bug 1325560] Re: kvm vm loses network connectivity under enough load

2014-06-02 Thread Izhar ul Hassan
@serge Yes. Thats correct. $ virsh reboot instance-name or a soft reboot from from inside the vm (while logged in through the serial console) does the trick. The VM is back online and accessible. And we can reproduce the process very easily. -- You received this bug notification because you