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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
       Status: Incomplete => Triaged

** Tags added: kernel-da-key

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https://bugs.launchpad.net/bugs/1477466

Title:
  Low performance when using vlan over VxLan

Status in linux package in Ubuntu:
  Triaged

Bug description:
  We see a performance issue when running traffic over vlan interface
  that created over VxLAN interface.

  We reach 24 Gbps over the VxLan interface while we reach only 4 Gbps
  over the VLAN interface.  Turned out that GRO isn't supported for VLAN
  over VxLAN.

  The following upstream commits fix this issue.

  commit 66e5133f19e901a044fa5eaeeb6ecff4545839e5
  Author: Toshiaki Makita <makita.toshiaki@xxxxxxxxxxxxx>
  Date:   Mon Jun 1 21:55:06 2015 +0900

      vlan: Add GRO support for non hardware accelerated vlan

      Currently packets with non-hardware-accelerated vlan cannot be handled
      by GRO. This causes low performance for 802.1ad and stacked vlan, as their
      vlan tags are currently not stripped by hardware.

      This patch adds GRO support for non-hardware-accelerated vlan and
      improves receive performance of them.

  commit 9b174d88c257150562b0101fcc6cb6c3cb74275c
  Author: Jesse Gross <jesse@xxxxxxxxxx>
  Date:   Tue Dec 30 19:10:15 2014 -0800

      net: Add Transparent Ethernet Bridging GRO support.

      Currently the only tunnel protocol that supports GRO with encapsulated
      Ethernet is VXLAN. This pulls out the Ethernet code into a proper layer
      so that it can be used by other tunnel protocols such as GRE and Geneve.

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