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[Launchpad Bug Tracker <1494423@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.19.0-49.55

---------------
linux (3.19.0-49.55) vivid; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1536775

  [ Colin Ian King ]

  * SAUCE: (no-up) ACPI / tables: Add acpi_force_32bit_fadt_addr option to
    force 32 bit FADT addresses
    - LP: #1529381

  [ Tim Gardner ]

  * [Config] Add DRM ast driver to udeb installer image
    - LP: #1514711
  * SAUCE: (no-up) Revert "[SCSI] libiscsi: Reduce locking contention in
    fast path"
    - LP: #1517142

  [ Upstream Kernel Changes ]

  * powerpc/eeh: Fix recursive fenced PHB on Broadcom shiner adapter
    - LP: #1532942
  * Drivers: hv: vmbus: prevent cpu offlining on newer hypervisors
    - LP: #1440103
  * Drivers: hv: vmbus: teardown hv_vmbus_con workqueue and
    vmbus_connection pages on shutdown
    - LP: #1440103
  * drivers: hv: vmbus: Teardown synthetic interrupt controllers on module
    unload
    - LP: #1440103
  * clockevents: export clockevents_unbind_device instead of
    clockevents_unbind
    - LP: #1440103
  * Drivers: hv: vmbus: Teardown clockevent devices on module unload
    - LP: #1440103
  * Drivers: hv: vmbus: Add support for VMBus panic notifier handler
    - LP: #1440103
  * hv: run non-blocking message handlers in the dispatch tasklet
    - LP: #1440103
  * Drivers: hv: vmbus: unregister panic notifier on module unload
    - LP: #1440103
  * Drivers: hv: vmbus: Implement the protocol for tearing down vmbus state
    - LP: #1440103
  * kexec: define kexec_in_progress in !CONFIG_KEXEC case
    - LP: #1440103
  * Drivers: hv: vmbus: add special kexec handler
    - LP: #1440103
  * Drivers: hv: don't do hypercalls when hypercall_page is NULL
    - LP: #1440103
  * Drivers: hv: vmbus: add special crash handler
    - LP: #1440103
  * Drivers: hv: vmbus: prefer 'die' notification chain to 'panic'
    - LP: #1440103
  * hyperv: Implement netvsc_get_channels() ethool op
    - LP: #1494423
  * hv_netvsc: Properly size the vrss queues
    - LP: #1494423
  * hv_netvsc: Allocate the sendbuf in a NUMA aware way
    - LP: #1494423
  * hv_netvsc: Allocate the receive buffer from the correct NUMA node
    - LP: #1494423
  * Drivers: hv: vmbus: Implement NUMA aware CPU affinity for channels
    - LP: #1494423
  * Drivers: hv: vmbus: Allocate ring buffer memory in NUMA aware fashion
    - LP: #1494423
  * Drivers: hv: vmbus: Improve the CPU affiliation for channels
    - LP: #1494423
  * Drivers: hv: vmbus: Further improve CPU affiliation logic
    - LP: #1494423

linux (3.19.0-48.54) vivid; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1536124
  * Merged back Ubuntu-3.19.0-46.52

 -- Brad Figg <brad.figg@xxxxxxxxxxxxx>  Thu, 21 Jan 2016 12:29:48 -0800

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

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https://bugs.launchpad.net/bugs/1494423

Title:
  Upstream commits for NUMA node performance in Hyper-V

Status in linux package in Ubuntu:
  In Progress
Status in linux-lts-trusty package in Ubuntu:
  In Progress
Status in linux-lts-trusty source package in Precise:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  Fix Released

Bug description:
  Microsoft has investigated networking with NUMA nodes and Hyper-V and
  found a number of areas where Linux performance could be corrected to
  be in line with other virtual machine types.

  Please include the following commits and their necessary prerequisites
  (which have been accepted upstream into the 4.2 kernel series) into
  the kernels for 15.10, 15.04, 14.04 (including HWE), and 12.04
  (including HWE):

  8/5 "Drivers: hv: vmbus: Further improve CPU affiliation logic" 
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3b71107d73b16074afa7658f3f0fcf837aabfe24

  8/5 "Drivers: hv: vmbus: Improve the CPU affiliation for channels"
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9f01ec53458d9e9b68f1c555e773b5d1a1f66e94

  6/12 "Drivers: hv: vmbus: Allocate ring buffer memory in NUMA aware fashion"
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=294409d20572e9bcf857328286433f851168d54a

  6/1 "Drivers: hv: vmbus: Implement NUMA aware CPU affinity for channels"
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f656ff3fdddc2f59649cc84b633b799908f1f7b

  5/31 "hv_netvsc: Allocate the receive buffer from the correct NUMA node"
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a726c2b499e390b1c1fc3092bd789f2192a2d03

  5/31 "hv_netvsc: Allocate the sendbuf in a NUMA aware way"
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5defde5946676ee23cd6a9d0e1de899410f4a33f

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