Public bug reported:

We are using Ubuntu server in AWS running linux-image-3.8.0-19-generic
when an instance has moderate network load (around 30mbit) we start to
see :

[31333817.179933] xennet: skb rides the rocket: 19 slots
[31334587.454365] xennet: skb rides the rocket: 21 slots
[31334772.157791] xennet: skb rides the rocket: 20 slots
[31335254.431489] xennet: skb rides the rocket: 19 slots
[31336785.643018] xennet: skb rides the rocket: 19 slots
[31337438.686311] xennet: skb rides the rocket: 21 slots

This then translates into packet loss

eth0      Link encap:Ethernet  HWaddr 0e:cd:f0:69:b1:29
          inet addr:10.0.7.254  Bcast:10.0.7.255  Mask:255.255.255.0
          inet6 addr: fe80::ccd:f0ff:fe69:b129/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1913740 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1619310 errors:0 dropped:6 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1196646593 (1.1 GB)  TX bytes:234005040 (234.0 MB)
          Interrupt:48

** Affects: linux-lts-raring (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: kernel-bug

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https://bugs.launchpad.net/bugs/1195474

Title:
  xennet driver reports "skb rides the rocket" under moderate load

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