Control: reassign -1 src:openvswitch 1.9.3+git20131029-1.1 On Jo, 13 feb 14, 16:05:53, Gary Hawkins wrote: > Source: openvswitch-switch > Version: 1.9.3+git20131029-1.1 > Severity: important > > Dear Maintainer, > > * What led up to the situation? > > I ran apt-get upgrade/aptitude safe-upgrade on the host to upgrade my testing > box to latest testing packages. > > * What exactly did you do (or not do) that was effective (or > ineffective)? > > After installing the latest 3.12 kernel (linux-image-3.12-1-amd64, version > 3.12.9-1) from testing causes TCP connections to stop working on qemu/kvm > connected to openvswitch by way of a virtio-net tap > device. Packet traces show lots of TCP retransmission errors. Very > occasionally a TCP connection works, but is dropped soon after. Most often > the connection stops working entirely. > > If I run the command: > ethtool -K <virtio-net tap device> tso off gro off gso off tx off rx off > > everything starts working again. > > Going back to 3.11 kernel also makes things work. > > * What was the outcome of this action? > > Using 3.12 kernel from testing causes TCP connections to stop working on > qemu/kvm guests and generates large numbers of TCP retransmission errors > > * What outcome did you expect instead? > > Using 3.12 kernel from testing should not break TCP connections on qemu/kvm > guests > > > > -- System Information: > Debian Release: jessie/sid > APT prefers testing > APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable') > Architecture: amd64 (x86_64) > > Kernel: Linux 3.12-1-amd64 (SMP w/1 CPU core) > Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash
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