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Public bug reported:

Dear Canonical,

A patch is now upstream to restore the irqfd fast path for Power, can
this be pulled into a 16.04.1? It was found to significantly help guest
small msg rate networking performance by ~30%.

Commit id:
b1a4286b8f3393857a205ec89607683161b75f90

  KVM: PPC: Book3S HV: Re-enable XICS fast path for irqfd-generated
interrupts

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-142629 severity-medium targetmilestone-inin16041

** Tags added: architecture-ppc64le bugnameltc-142629 severity-medium
targetmilestone-inin16041

** Changed in: ubuntu
     Assignee: (unassigned) => Taco Screen team (taco-screen-team)

** Package changed: ubuntu => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1592809

Title:
  Restore irqfd fast path for PPC

Status in linux package in Ubuntu:
  New

Bug description:
  Dear Canonical,

  A patch is now upstream to restore the irqfd fast path for Power, can
  this be pulled into a 16.04.1? It was found to significantly help
  guest small msg rate networking performance by ~30%.

  Commit id:
  b1a4286b8f3393857a205ec89607683161b75f90

    KVM: PPC: Book3S HV: Re-enable XICS fast path for irqfd-generated
  interrupts

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