[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
*** This bug is a duplicate of bug 997978 *** https://bugs.launchpad.net/bugs/997978 @Itec I've marked this as a duplicate of 997978 as you suggested above. If you find that the fix for that bug does NOT solve your issue, then please go ahead and un-mark this as a duplicate. ** This bug has been marked a duplicate of bug 997978 KVM images lose connectivity with bridged network -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
No, the vhost_net module is not loaded. Loading it does not help. No, 'ifdown eth0; ifup eth0' in the guest does not reliably bring networking back up. Sometimes it works, sometimes I have to reboot the VM. The last times it did not work any more. My problem might be the same as bug 997978. But I only have it in conjunction with bridged bonding and I only have seen the effect after heavy load and not after time. Maybe it could occur after a longer period of time on my system, too. qemu-kvm in ppa:ubuntu-virt/backports and ppa:ubuntu-virt/kvm-network- hang both work well, but I did no long time testing. It still could occur after some time. Now I am running my iperf-test with the kvm-network-hang version over some hours, but I cannot test it infinitely long. What are the differences between the official version of qemu-kvm and the one in kvm-network-hang? I really need to know if it is reliable in order to come to a decision, wether to use it or not in production systems! -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
Quoting ITec (1050...@bugs.launchpad.net): What are the differences between the official version of qemu-kvm and the one in kvm-network-hang? The version in kvm-network-hang is the same as the official version, plus three virtio patches from upstream: a821ce5 virtio: order index/descriptor reads 92045d8 virtio: add missing mb() on enable notification a281ebc virtio: add missing mb() on notification That version will likely become the new official version, once there are confirmations that it is solving these virtio-network related bugs. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
Would you suggest to mark this bug as a duplicate to bug 997978? I could register myself to be affected, add some words about how the effect occurs at my system and confirm that the kvm-network-hang version helped me. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
It sounds like your bug is fixed by the same commits, but your descriptions in comment #6 make me think the actual bug may be different. ** Changed in: linux (Ubuntu) Status: Incomplete = New ** Changed in: qemu-kvm (Ubuntu) Status: Incomplete = New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
@brad-figg: My system is behind a firewall. I do not have direct access to the internet and apport-bug --save=/tmp/bug.apt does not produce any output. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
Yes, the switch is 802.3ad enabled. LACP Group Status says: System ID :00:15:77:C1:76:92 Key: 1 Aggregator Attached Port List 9 9,10 10 Key and SystemID correspond with Partner Key and Partner Mac Address shown in /proc/net/bonding/bond2 I tried the same tests with a container. I had to change lxc.network.bridge=brb2 to lxc.network.link=brb2 to get it work. The problem did not occur in the container. Nor does it occur with emulated NICs like e1000 in the virtual machine. But these are much slower than NICs of the type virtio. Does lxc use virtio? It only occurs with virtio. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
Is the vhost_net module loaded? If not, does it help to 'sudo modprobe vhost_net' ? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
Also, does 'ifdown eth0; ifup eth0' in the guest bring networking back up? I'm wondering whether you have the same problem as bug 997978. Note that that bug was fixed for reporters by using the qemu-kvm in ppa :ubuntu-virt/backports, and we're waiting on feedback on whether the qemu-kvm version in ppa:ubuntu-virt/kvm-network-hang also fixes it. So it should definately be worth it to test at leaset ppa:ubuntu- virt/backports. ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided = High ** Changed in: qemu-kvm (Ubuntu) Status: New = Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
Thanks for reporting this bug. Can you confirm that your switch is configured to enable 802.3ad mode? Would it be possible to confirm that this does not happen with a container? The recipe to create the container would be: === sudo apt-get -y install lxc cat lxc2.conf EOF lxc.network.type=veth lxc.network.bridge=brb2 lxc.network.flags=up EOF sudo lxc-create -t ubuntu -n q1 -f lxc2.conf === Then start the container with sudo lxc-start -n q1 log in on that console with username ubuntu password ubuntu, and run the test from there? ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: New = Incomplete ** Changed in: linux (Ubuntu) Importance: Undecided = High -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1050934] Re: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor
Also, please run 'apport-collect 1050934' to cause more debug information to be uploaded. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
