kernel-packages team mailing list archive

[Leann Ogasawara <leann.ogasawara@xxxxxxxxxxxxx>]

Fix Committed for both Utopic and Vivid.  I accidentally added a Lucid
task so have marked that Invalid.  Thanks.

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

** Also affects: linux (Ubuntu Lucid)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Vivid)
   Importance: Medium
     Assignee: Paolo Pisati (p-pisati)
       Status: Fix Committed

** Changed in: linux (Ubuntu Lucid)
       Status: New => Invalid

** Also affects: linux (Ubuntu Utopic)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Utopic)
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1396470

Title:
  please enable CONFIG_VIRTIO_MMIO on armmp

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Lucid:
  Invalid
Status in linux source package in Utopic:
  Fix Committed
Status in linux source package in Vivid:
  Fix Committed

Bug description:
  [Impact]
  Degraded performance during network and disk activity in a kvm guest.

  [Test case]
  Try booting a vm and do some disk/net activity with and without this driver.

  [Regression potential]
  In case of regressions, it will just hit people using kvm on 32bit armhf hardware (the lpae variant in particular): we already had this driver on in the past, it's on by default on every arch, it's widely used and upstream is very active - i say it's a low potential regression.

  --
  Hi,

  The current armmp (linux-
  image-3.16.0-26-generic_3.16.0-26.34_armhf.deb) could have virtio-mmio
  enabled for faster vm guests. Currenlty it seems to have:

  CONFIG_NET_9P_VIRTIO=m
  CONFIG_VIRTIO_BLK=y
  CONFIG_SCSI_VIRTIO=m
  CONFIG_VIRTIO_NET=y
  CONFIG_CAIF_VIRTIO=m
  CONFIG_VIRTIO_CONSOLE=y
  CONFIG_HW_RANDOM_VIRTIO=m
  CONFIG_VIRTIO=y
  CONFIG_VIRTIO_PCI=y
  # CONFIG_VIRTIO_BALLOON is not set
  # CONFIG_VIRTIO_MMIO is not set

  Now using virtio net and block is not possible, and you have to revert
  to emulated devices.

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