[Bug 1541902] Re: [FFE] Enable DDW on qemu aiming GPU passthrough performance on Ubuntu KVM

[Breno Leitão]

I would like to justify this FFe as this is an important feature for
Ubuntu 16.04/ppc64el

[Technical Justification]
This feature enables GPU pass through to work decently on Ubuntu KVM. Without this feature, GPU pass through works with a very bad performance, which is completely unusable in production. This feature enables a huge performance improvement, allowing Ubuntu KVM deployment in production environments.

[ Customer justification]
There are numerous partners interested in this feature, and a real set of customers that will be taking benefit directly if this feature makes Ubuntu 16.04 release.

[Testing plan]
This set of patch is being tested internally at IBM.

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https://bugs.launchpad.net/bugs/1541902

Title:
  [FFE] Enable DDW on qemu aiming GPU passthrough performance on Ubuntu
  KVM

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