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[Launchpad Bug Tracker <1556037@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.4.0-13.29

---------------
linux (4.4.0-13.29) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1556247

  * s390/mm: four page table levels vs. fork (LP: #1556141)
    - s390/mm: four page table levels vs. fork

  * [Hyper-V] network performance patches for Xenial 16.04 (LP: #1556037)
    - hv_netvsc: use skb_get_hash() instead of a homegrown implementation
    - hv_netvsc: cleanup netdev feature flags for netvsc

  * fails to boot on megaraid (LP: #1552903)
    - SAUCE: (noup) megaraid_sas: Don't issue kill adapter for MFI controllers in
      case of PD list DCMD failure

  * ALSA: hda - add codec support for Kabylake display audio codec (LP: #1556002)
    - ALSA: hda - add codec support for Kabylake display audio codec

  * Backport upstream bugfixes to ubuntu-16.04 (LP: #1555765)
    - cpufreq: powernv: Free 'chips' on module exit
    - cpufreq: powernv: Hot-plug safe the kworker thread
    - cpufreq: powernv: Remove cpu_to_chip_id() from hot-path
    - cpufreq: powernv/tracing: Add powernv_throttle tracepoint
    - cpufreq: powernv: Replace pr_info with trace print for throttle event
    - SAUCE: (noup) cpufreq: powernv: Fix bugs in powernv_cpufreq_{init/exit}

  * Linux netfilter IPT_SO_SET_REPLACE memory corruption (LP: #1555338)
    - SAUCE: [nf,v2] netfilter: x_tables: don't rely on well-behaving userspace

  * integer overflow in xt_alloc_table_info (LP: #1555353)
    - SAUCE: (noup) netfilter: x_tables: check for size overflow

  * linux: auto-generate the reconstruct information from the git tag (LP: #1555543)
    - [Packaging] reconstruct -- automatically reconstruct against base tag
    - [Config] reconstruct -- update to autoreconstruct output
    - [Packaging] reconstruct -- update when inserting final changes

  * Xenial update to v4.4.5 stable release (LP: #1555640)
    - use ->d_seq to get coherency between ->d_inode and ->d_flags
    - drivers: sh: Restore legacy clock domain on SuperH platforms
    - Btrfs: fix deadlock running delayed iputs at transaction commit time
    - btrfs: Fix no_space in write and rm loop
    - btrfs: async-thread: Fix a use-after-free error for trace
    - block: Initialize max_dev_sectors to 0
    - PCI: keystone: Fix MSI code that retrieves struct pcie_port pointer
    - parisc: Fix ptrace syscall number and return value modification
    - mips/kvm: fix ioctl error handling
    - kvm: x86: Update tsc multiplier on change.
    - fbcon: set a default value to blink interval
    - cifs: fix out-of-bounds access in lease parsing
    - CIFS: Fix SMB2+ interim response processing for read requests
    - Fix cifs_uniqueid_to_ino_t() function for s390x
    - vfio: fix ioctl error handling
    - KVM: x86: fix root cause for missed hardware breakpoints
    - arm/arm64: KVM: Fix ioctl error handling
    - iommu/amd: Apply workaround for ATS write permission check
    - iommu/amd: Fix boot warning when device 00:00.0 is not iommu covered
    - iommu/vt-d: Use BUS_NOTIFY_REMOVED_DEVICE in hotplug path
    - target: Fix WRITE_SAME/DISCARD conversion to linux 512b sectors
    - drm/ast: Fix incorrect register check for DRAM width
    - drm/radeon/pm: update current crtc info after setting the powerstate
    - drm/amdgpu/pm: update current crtc info after setting the powerstate
    - drm/amdgpu: apply gfx_v8 fixes to gfx_v7 as well
    - drm/amdgpu/gfx8: specify which engine to wait before vm flush
    - drm/amdgpu: return from atombios_dp_get_dpcd only when error
    - libata: fix HDIO_GET_32BIT ioctl
    - libata: Align ata_device's id on a cacheline
    - block: bio: introduce helpers to get the 1st and last bvec
    - writeback: flush inode cgroup wb switches instead of pinning super_block
    - Adding Intel Lewisburg device IDs for SATA
    - arm64: vmemmap: use virtual projection of linear region
    - PM / sleep / x86: Fix crash on graph trace through x86 suspend
    - ata: ahci: don't mark HotPlugCapable Ports as external/removable
    - tracing: Do not have 'comm' filter override event 'comm' field
    - pata-rb532-cf: get rid of the irq_to_gpio() call
    - Btrfs: fix loading of orphan roots leading to BUG_ON
    - Revert "jffs2: Fix lock acquisition order bug in jffs2_write_begin"
    - jffs2: Fix page lock / f->sem deadlock
    - Fix directory hardlinks from deleted directories
    - dmaengine: pxa_dma: fix cyclic transfers
    - adv7604: fix tx 5v detect regression
    - ALSA: usb-audio: Add a quirk for Plantronics DA45
    - ALSA: ctl: Fix ioctls for X32 ABI
    - ALSA: hda - Fix mic issues on Acer Aspire E1-472
    - ALSA: rawmidi: Fix ioctls X32 ABI
    - ALSA: timer: Fix ioctls for X32 ABI
    - ALSA: pcm: Fix ioctls for X32 ABI
    - ALSA: seq: oss: Don't drain at closing a client
    - ALSA: hdspm: Fix wrong boolean ctl value accesses
    - ALSA: hdsp: Fix wrong boolean ctl value accesses
    - ALSA: hdspm: Fix zero-division
    - ALSA: timer: Fix broken compat timer user status ioctl
    - usb: chipidea: otg: change workqueue ci_otg as freezable
    - USB: cp210x: Add ID for Parrot NMEA GPS Flight Recorder
    - USB: qcserial: add Dell Wireless 5809e Gobi 4G HSPA+ (rev3)
    - USB: qcserial: add Sierra Wireless EM74xx device ID
    - USB: serial: option: add support for Telit LE922 PID 0x1045
    - USB: serial: option: add support for Quectel UC20
    - MIPS: scache: Fix scache init with invalid line size.
    - MIPS: traps: Fix SIGFPE information leak from `do_ov' and `do_trap_or_bp'
    - ubi: Fix out of bounds write in volume update code
    - i2c: brcmstb: allocate correct amount of memory for regmap
    - thermal: cpu_cooling: fix out of bounds access in time_in_idle
    - block: check virt boundary in bio_will_gap()
    - block: get the 1st and last bvec via helpers
    - drm/i915: more virtual south bridge detection
    - drm/i915: refine qemu south bridge detection
    - modules: fix longstanding /proc/kallsyms vs module insertion race.
    - drm/amdgpu: fix topaz/tonga gmc assignment in 4.4 stable
    - Linux 4.4.5

  * QEMU: causes vCPU steal time overflow on live migration (LP: #1494350)
    - x86/mm: Fix slow_virt_to_phys() for X86_PAE again

  * TPM2.0 trusted keys fixes (LP: #1398274)
    - tpm_tis: further simplify calculation of ordinal duration
    - tpm_tis: Use devm_free_irq not free_irq
    - tpm_tis: Ensure interrupts are disabled when the driver starts
    - tpm: rework tpm_get_timeouts()
    - tpm_tis: Get rid of the duplicate IRQ probing code
    - tpm_tis: Refactor the interrupt setup
    - tpm_tis: Tighten IRQ auto-probing
    - tpm_ibmvtpm: properly handle interrupted packet receptions

  * linux: review all versioned depends/conflicts/replaces/breaks for validility (LP: #1555033)
    - [Config] control.stub.in -- review versioned Build-Depends:
    - [Config] control.stub.in -- review versioned
      Depends/Breaks/Conflicts/Replaces
    - [Config] flavour-control.stub -- review versioned Breaks/Conflicts/Replaces
    - [Config] x86 vars.* -- review versioned Breaks/Conflicts/Replaces

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Wed, 09 Mar 2016 05:11:51
-0700

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

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https://bugs.launchpad.net/bugs/1556037

Title:
  [Hyper-V] network performance patches for Xenial 16.04

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Please include the below 2 patches in the 4.4 kernel for Xenial.
  These are not currently present in the daily builds, and the network performance numbers are not very high. With these patches we expect to see an increase.

  hv_netvsc: cleanup netdev feature flags for netvsc
  http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/drivers/net/hyperv?id=a060679c6b3da17dc9e95d0500f811de118ec901

  hv_netvsc: use skb_get_hash() instead of a homegrown implementation
  http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=757647e10e55c01fb7a9c4356529442e316a7c72

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