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[Launchpad Bug Tracker <1400209@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.16.0-30.40

---------------
linux (3.16.0-30.40) utopic; urgency=low

  [ Seth Forshee ]

  * Release Tracking Bug
    - LP: #1409890

  [ Andy Whitcroft ]

  * Revert "SAUCE: scsi: hyper-v storsvc switch up to SPC-3"
  * [Packaging] uploadnum should be the remainder of the version
    - LP: #1407755

  [ K. Y. Srinivasan ]

  * SAUCE: storvsc: force SPC-3 compliance on win8 and win8 r2 hosts
    - LP: #1406867

  [ Upstream Kernel Changes ]

  * Revert "xhci: clear root port wake on bits if controller isn't wake-up
    capable"
    - LP: #1408697
  * KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor mode
    - LP: #1400209
  * powerpc/powernv: Ignore smt-enabled on Power8 and later
    - LP: #1402141
  * net/mlx4_en: Add VXLAN ndo calls to the PF net device ops too
    - LP: #1407760
  * net/mlx4_core: Enable CQE/EQE stride support
    - LP: #1400127
  * net/mlx4_core: Cache line EQE size support
    - LP: #1400127
  * net/mlx4_en: Add mlx4_en_get_cqe helper
    - LP: #1400127
  * net/mlx4_core: Introduce mlx4_get_module_info for cable module info
    reading
    - LP: #1400127
  * ethtool, net/mlx4_en: Cable info, get_module_info/eeprom ethtool
    support
    - LP: #1400127
  * net/mlx4_core: Introduce ACCESS_REG CMD and eth_prot_ctrl dev cap
    - LP: #1400127
  * net/mlx4_core: Add ethernet backplane autoneg device capability
    - LP: #1400127
  * ethtool, net/mlx4_en: Add 100M, 20G, 56G speeds ethtool reporting
    support
    - LP: #1400127
  * net/mlx4_en: Use PTYS register to query ethtool settings
    - LP: #1400127
  * net/mlx4_en: Use PTYS register to set ethtool settings (Speed)
    - LP: #1400127
  * net/mlx4_en: Add support for setting rxvlan offload OFF/ON
    - LP: #1400127
  * net/mlx4_en: Add ethtool support for [rx|tx]vlan offload set to OFF/ON
    - LP: #1400127
  * net/mlx4_core: Prevent VF from changing port configuration
    - LP: #1400127
  * net/mlx4_en: mlx4_en_set_settings() always fails when autoneg is set
    - LP: #1400127
  * sparc64: Fix constraints on swab helpers.
    - LP: #1408697
  * inetdevice: fixed signed integer overflow
    - LP: #1408697
  * ipv4: Fix incorrect error code when adding an unreachable route
    - LP: #1408697
  * ieee802154: fix error handling in ieee802154fake_probe()
    - LP: #1408697
  * qmi_wwan: Add support for HP lt4112 LTE/HSPA+ Gobi 4G Modem
    - LP: #1408697
  * bonding: fix curr_active_slave/carrier with loadbalance arp monitoring
    - LP: #1408697
  * pptp: fix stack info leak in pptp_getname()
    - LP: #1408697
  * ipx: fix locking regression in ipx_sendmsg and ipx_recvmsg
    - LP: #1408697
  * net/mlx4_en: Advertize encapsulation offloads features only when VXLAN
    tunnel is set
    - LP: #1408697
  * target: Don't call TFO->write_pending if data_length == 0
    - LP: #1408697
  * vhost-scsi: Take configfs group dependency during
    VHOST_SCSI_SET_ENDPOINT
    - LP: #1408697
  * srp-target: Retry when QP creation fails with ENOMEM
    - LP: #1408697
  * ASoC: fsi: remove unsupported PAUSE flag
    - LP: #1408697
  * ASoC: rsnd: remove unsupported PAUSE flag
    - LP: #1408697
  * ib_isert: Add max_send_sge=2 minimum for control PDU responses
    - LP: #1408697
  * iser-target: Handle DEVICE_REMOVAL event on network portal listener
    correctly
    - LP: #1408697
  * ASoC: dpcm: Fix race between FE/BE updates and trigger
    - LP: #1408697
  * ASoC: samsung: Add MODULE_DEVICE_TABLE for Snow
    - LP: #1408697
  * mac80211: Fix regression that triggers a kernel BUG with CCMP
    - LP: #1408697
  * rt2x00: do not align payload on modern H/W
    - LP: #1408697
  * ath9k: Fix RTC_DERIVED_CLK usage
    - LP: #1408697
  * ASoC: cs42l51: re-hook of_match_table pointer
    - LP: #1408697
  * ASoC: sgtl5000: Fix SMALL_POP bit definition
    - LP: #1408697
  * ALSA: usb-audio: Add ctrl message delay quirk for Marantz/Denon devices
    - LP: #1408697
  * bitops: Fix shift overflow in GENMASK macros
    - LP: #1408697
  * x86: Require exact match for 'noxsave' command line option
    - LP: #1408697
  * drm/i915: drop WaSetupGtModeTdRowDispatch:snb
    - LP: #1408697
  * drm/i915: Handle failure to kick out a conflicting fb driver
    - LP: #1408697
  * drm/i915: Kick fbdev before vgacon
    - LP: #1408697
  * ASoC: wm_adsp: Avoid attempt to free buffers that might still be in use
    - LP: #1408697
  * can: dev: avoid calling kfree_skb() from interrupt context
    - LP: #1408697
  * can: esd_usb2: fix memory leak on disconnect
    - LP: #1408697
  * x86, mm: Set NX across entire PMD at boot
    - LP: #1408697
  * x86, kaslr: Handle Gold linker for finding bss/brk
    - LP: #1408697
  * of/irq: Drop obsolete 'interrupts' vs 'interrupts-extended' text
    - LP: #1408697
  * of: Fix crash if an earlycon driver is not found
    - LP: #1408697
  * of/base: Fix PowerPC address parsing hack
    - LP: #1408697
  * clockevent: sun4i: Fix race condition in the probe code
    - LP: #1408697
  * MIPS: IP27: Fix __node_distances undefined error
    - LP: #1408697
  * MIPS: oprofile: Fix backtrace on 64-bit kernel
    - LP: #1408697
  * MIPS: asm: uaccess: Add v1 register to clobber list on EVA
    - LP: #1408697
  * MIPS: lib: memcpy: Restore NOP on delay slot before returning to caller
    - LP: #1408697
  * btrfs: fix lockups from btrfs_clear_path_blocking
    - LP: #1408697
  * PCI: Support 64-bit bridge windows if we have 64-bit dma_addr_t
    - LP: #1408697
  * ACPI / PM: Ignore wakeup setting if the ACPI companion can't wake up
    - LP: #1408697
  * IB/isert: Adjust CQ size to HW limits
    - LP: #1408697
  * drm/radeon: fix endian swapping in vbios fetch for tdp table
    - LP: #1408697
  * fold swapping ->d_name.hash into switch_names()
    - LP: #1408697
  * vfs: Don't exchange "short" filenames unconditionally.
    - LP: #1408697
  * ARM: pxa: fix hang on startup with DEBUG_LL
    - LP: #1408697
  * ALSA: hda_intel: Add Device IDs for Intel Sunrise Point PCH
    - LP: #1408697
  * ALSA: hda_intel: Add DeviceIDs for Sunrise Point-LP
    - LP: #1408697
  * HID: usbhid: Use flag HID_DISCONNECTED when a usb device is removed
    - LP: #1408697
  * Bluetooth: Add support for Intel bootloader devices
    - LP: #1408697
  * Bluetooth: Handle Intel USB bootloader with buggy interrupt
    - LP: #1408697
  * Bluetooth: Ignore isochronous endpoints for Intel USB bootloader
    - LP: #1408697
  * Bluetooth: Fix endian and alignment issue with ath3k version handling
    - LP: #1408697
  * Bluetooth: Add support for Broadcom device of Asus Z97-DELUXE
    motherboard
    - LP: #1408697
  * Bluetooth: Fix crash in the Marvell driver initialization codepath
    - LP: #1408697
  * Bluetooth: Add support for Acer [13D3:3432]
    - LP: #1408697
  * Add a new PID/VID 0227/0930 for AR3012.
    - LP: #1408697
  * Input: xpad - add VID/PID for Razer Sabertooth
    - LP: #1408697
  * Input: xpad - sync device IDs with xboxdrv
    - LP: #1408697
  * Input: xpad - add USB ID for Thrustmaster Ferrari 458 Racing Wheel
    - LP: #1408697
  * Input: serio - avoid negative serio device numbers
    - LP: #1408697
  * nfs: Don't busy-wait on SIGKILL in __nfs_iocounter_wait
    - LP: #1408697
  * aio: fix uncorrent dirty pages accouting when truncating AIO ring
    buffer
    - LP: #1408697
  * ARM: mvebu: add missing of_node_put() call in coherency.c
    - LP: #1408697
  * spi: dw: Fix dynamic speed change.
    - LP: #1408697
  * USB: serial: cp210x: add IDs for CEL MeshConnect USB Stick
    - LP: #1408697
  * iio: Fix IIO_EVENT_CODE_EXTRACT_DIR bit mask
    - LP: #1408697
  * iio: adc: men_z188_adc: Add terminating entry for men_z188_ids
    - LP: #1408697
  * Input: synaptics - adjust min/max on Thinkpad E540
    - LP: #1408697
  * spi: Fix mapping from vmalloc-ed buffer to scatter list
    - LP: #1408697
  * clk-divider: Fix READ_ONLY when divider > 1
    - LP: #1408697
  * spi: sirf: fix word width configuration
    - LP: #1408697
  * usb: serial: ftdi_sio: add PIDs for Matrix Orbital products
    - LP: #1408697
  * USB: keyspan: fix tty line-status reporting
    - LP: #1408697
  * USB: keyspan: fix overrun-error reporting
    - LP: #1408697
  * USB: ssu100: fix overrun-error reporting
    - LP: #1408697
  * nfsd: correctly define v4.2 support attributes
    - LP: #1408697
  * SUNRPC: Fix locking around callback channel reply receive
    - LP: #1408697
  * nfsd: Fix slot wake up race in the nfsv4.1 callback code
    - LP: #1408697
  * bnx2fc: do not add shared skbs to the fcoe_rx_list
    - LP: #1408697
  * scsi: add Intel Multi-Flex to scsi scan blacklist
    - LP: #1408697
  * ARM: 8216/1: xscale: correct auxiliary register in suspend/resume
    - LP: #1408697
  * USB: uas: Add no-uas quirk for Hitachi usb-3 enclosures 4971:1012
    - LP: #1408697
  * USB: xhci: don't start a halted endpoint before its new dequeue is set
    - LP: #1408697
  * USB: xhci: Reset a halted endpoint immediately when we encounter a
    stall.
    - LP: #1408697
  * usb: xhci: rework root port wake bits if controller isn't allowed to
    wakeup
    - LP: #1408697
  * ixgbe: Correctly disable VLAN filter in promiscuous mode
    - LP: #1408697
  * ixgbe: Fix possible null-dereference in error path
    - LP: #1408697
  * ixgbe: fix use after free adapter->state test in
    ixgbe_remove/ixgbe_probe
    - LP: #1408697
  * ALSA: hda - Limit 40bit DMA for AMD HDMI controllers
    - LP: #1408697
  * PCI/MSI: Add device flag indicating that 64-bit MSIs don't work
    - LP: #1408697
  * gpu/radeon: Set flag to indicate broken 64-bit MSI
    - LP: #1408697
  * sound/radeon: Move 64-bit MSI quirk from arch to driver
    - LP: #1408697
  * powerpc/pseries: Honor the generic "no_64bit_msi" flag
    - LP: #1408697
  * MIPS: r4kcache: Add EVA case for protected_writeback_dcache_line
    - LP: #1408697
  * MIPS: cpu-probe: Set the FTLB probability bit on supported cores
    - LP: #1408697
  * MIPS: fix EVA & non-SMP non-FPU FP context signal handling
    - LP: #1408697
  * MIPS: Loongson: Make platform serial setup always built-in.
    - LP: #1408697
  * drm/i915: Ignore SURFLIVE and flip counter when the GPU gets reset
    - LP: #1408697
  * net/ping: handle protocol mismatching scenario
    - LP: #1408697
  * usb-quirks: Add reset-resume quirk for MS Wireless Laser Mouse 6000
    - LP: #1408697
  * Input: xpad - use proper endpoint type
    - LP: #1408697
  * powerpc/powernv: Replace OPAL_DEASSERT_RESET with EEH_RESET_DEACTIVATE
    - LP: #1408697
  * powerpc: 32 bit getcpu VDSO function uses 64 bit instructions
    - LP: #1408697
  * drm/radeon: report disconnected for LVDS/eDP with PX if ddc fails
    - LP: #1408697
  * ARM: 8222/1: mvebu: enable strex backoff delay
    - LP: #1408697
  * ARM: 8226/1: cacheflush: get rid of restarting block
    - LP: #1408697
  * staging: r8188eu: Add new device ID for DLink GO-USB-N150
    - LP: #1408697
  * btrfs: zero out left over bytes after processing compression streams
    - LP: #1408697
  * uprobes, x86: Fix _TIF_UPROBE vs _TIF_NOTIFY_RESUME
    - LP: #1408697
  * powerpc/powernv: Honor the generic "no_64bit_msi" flag
    - LP: #1408697
  * net: sun4i-emac: fix memory leak on bad packet
    - LP: #1408697
  * drivers/net, ipv6: Select IPv6 fragment idents for virtio UFO packets
    - LP: #1408697
  * smiapp: Only some selection targets are settable
    - LP: #1408697
  * i2c: omap: fix NACK and Arbitration Lost irq handling
    - LP: #1408697
  * s2255drv: fix payload size for JPG, MJPEG
    - LP: #1408697
  * x86: Use $(OBJDUMP) instead of plain objdump
    - LP: #1408697
  * of/fdt: memblock_reserve /memreserve/ regions in the case of partial
    overlap
    - LP: #1408697
  * drm/nouveau/gf116: remove copy1 engine
    - LP: #1408697
  * nouveau: move the hotplug ignore to correct place.
    - LP: #1408697
  * ALSA: hda/realtek - Add headset Mic support for new Dell machine
    - LP: #1408697
  * drm/i915: More cautious with pch fifo underruns
    - LP: #1408697
  * drm/i915: Unlock panel even when LVDS is disabled
    - LP: #1408697
  * AHCI: Add DeviceIDs for Sunrise Point-LP SATA controller
    - LP: #1408697
  * sata_fsl: fix error handling of irq_of_parse_and_map
    - LP: #1408697
  * drm/radeon: kernel panic in drm_calc_vbltimestamp_from_scanoutpos with
    3.18.0-rc6
    - LP: #1408697
  * mm: frontswap: invalidate expired data on a dup-store failure
    - LP: #1408697
  * mm/vmpressure.c: fix race in vmpressure_work_fn()
    - LP: #1408697
  * drivers/input/evdev.c: don't kfree() a vmalloc address
    - LP: #1408697
  * mm: fix swapoff hang after page migration and fork
    - LP: #1408697
  * mm: fix anon_vma_clone() error treatment
    - LP: #1408697
  * slab: fix nodeid bounds check for non-contiguous node IDs
    - LP: #1408697
  * ahci: disable MSI on SAMSUNG 0xa800 SSD
    - LP: #1408697
  * i2c: davinci: generate STP always when NACK is received
    - LP: #1408697
  * i2c: cadence: Set the hardware time-out register to maximum value
    - LP: #1408697
  * drm/radeon: sync all BOs involved in a CS v2
    - LP: #1408697
  * ip_tunnel: the lack of vti_link_ops' dellink() cause kernel panic
    - LP: #1408697
  * ipv6: gre: fix wrong skb->protocol in WCCP
    - LP: #1408697
  * Fix race condition between vxlan_sock_add and vxlan_sock_release
    - LP: #1408697
  * tg3: fix ring init when there are more TX than RX channels
    - LP: #1408697
  * net/mlx4_core: Limit count field to 24 bits in qp_alloc_res
    - LP: #1408697
  * bond: Check length of IFLA_BOND_ARP_IP_TARGET attributes
    - LP: #1408697
  * rtnetlink: release net refcnt on error in do_setlink()
    - LP: #1408697
  * gre: Set inner mac header in gro complete
    - LP: #1408697
  * mips: bpf: Fix broken BPF_MOD
    - LP: #1408697
  * net: mvneta: fix Tx interrupt delay
    - LP: #1408697
  * net: mvneta: fix race condition in mvneta_tx()
    - LP: #1408697
  * net: sctp: use MAX_HEADER for headroom reserve in output path
    - LP: #1408697
  * i2c: omap: fix i207 errata handling
    - LP: #1408697
  * x86/asm/traps: Disable tracing and kprobes in fixup_bad_iret and
    sync_regs
    - LP: #1408697
  * USB: add reset resume quirk for usb3503
    - LP: #1408697
  * PCI: pciehp: Prevent NULL dereference during probe
    - LP: #1408697
  * Linux 3.16.7-ckt3
    - LP: #1408697
  * Drivers: hv: util: make struct hv_do_fcopy match Hyper-V host messages
    - LP: #1401903
 -- Seth Forshee <seth.forshee@xxxxxxxxxxxxx>   Mon, 12 Jan 2015 14:11:48 -0600

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

-- 
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https://bugs.launchpad.net/bugs/1400209

Title:
  KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor mode

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Utopic:
  Fix Released

Bug description:
  SRU Justification:
  [Impact]
  KVM guests on PowerNV allocate memory for CMA in kvm_cma_reserve unnecessarily leading to additional memory consumption.

  [Test Case]
  Boot a KVM guest on PowerNV and measure the differences in memory consumption with and without this patch.

  [Fix]
  commit cec26bc3c125b5dd12a02f04133cd91eae3f1622 upstream
  in v3.18-rc1

  --

  Problem Description
  ==================
  This bugzilla is opened to track the inclusion of the upstream commit mentioned below:

  commit cec26bc3c125b5dd12a02f04133cd91eae3f1622
  Author: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
  Date:   Mon Sep 29 13:32:38 2014 +0530

      KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor
  mode

      We use cma reserved area for creating guest hash page table.
      Don't do the reservation in non-hypervisor mode. This avoids unnecessary
      CMA reservation when booting with limited memory configs like
      fadump and kdump.

  ---uname output---
  ubuntu14.10

  Machine Type = ppc64

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