kernel-packages team mailing list archive

[Chris J Arges <1201869@xxxxxxxxxxxxxxxxxx>]

** Description changed:

+ SRU Justification:
+ 
+ Impact:
+ Users of the 3.5/3.8 kernel will have poor network throughput when using OpenStack Neutron depending on their setup.
+ 
+ Fix:
+ These patches are all in Ubuntu-3.9.0-7.15 / v3.9-rc1:
+ 2681128f0ced8aa4e66f221197e183cc16d244fe
+ 8093315a91340bca52549044975d8c7f673b28a1
+ d0e2c55e7c940a3ee91e9e23a2683b593690f1e9
+ 
+ Testcase:
+ Setup OpenStack Neutron. Test throughput between internal and external nodes.
+ 
+ --
+ 
  OpenStack Neutron does IP forwarding through a network namespace. A veth
  pair is used to connect into the namespace. The veth pair appears to be
  the bottleneck, independent of network namespace. In newer versions of
- Linux (3.9) throughput is much higher.
+ Linux (Ubuntu-3.9.0-7.15 / v3.9-rc1 and greater) throughput is much
+ higher by almost 3 times.
  
  This has been confirmed on kernels from 3.5.x-3.8.x. (Quantal and Raring
  lts backports)

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https://bugs.launchpad.net/bugs/1201869

Title:
  poor networking throughput across an OpenStack Neutron router on
  3.5/3.8 kernels

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Quantal:
  In Progress
Status in “linux” source package in Raring:
  In Progress

Bug description:
  SRU Justification:

  Impact:
  Users of the 3.5/3.8 kernel will have poor network throughput when using OpenStack Neutron depending on their setup.

  Fix:
  These patches are all in Ubuntu-3.9.0-7.15 / v3.9-rc1:
  2681128f0ced8aa4e66f221197e183cc16d244fe
  8093315a91340bca52549044975d8c7f673b28a1
  d0e2c55e7c940a3ee91e9e23a2683b593690f1e9

  Testcase:
  Setup OpenStack Neutron. Test throughput between internal and external nodes.

  --

  OpenStack Neutron does IP forwarding through a network namespace. A
  veth pair is used to connect into the namespace. The veth pair appears
  to be the bottleneck, independent of network namespace. In newer
  versions of Linux (Ubuntu-3.9.0-7.15 / v3.9-rc1 and greater)
  throughput is much higher by almost 3 times.

  This has been confirmed on kernels from 3.5.x-3.8.x. (Quantal and
  Raring lts backports)

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