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[Bug 1400319] Re: [Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10


** Tags added: kernel-hyper-v

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  [Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10

Status in linux package in Ubuntu:

Bug description:
  While testing the final build of 14.10 32bit we found that kernel
  panic cannot be activated for an installation on a Hyper-V VM.

  Repro rate: 100%
  Repro details:
  Hyper-V: Server 2012 R2
  VM: Ubuntu 14.10 32bit

  Kdump is enabled in the config file at /etc/default/kdump-tools

  Different crashkernel values used in grub.cfg – 128M-:64M | 256M-:128m
  | 384M-:256M

  VM settings: 2 cores, various RAM sizes attempted: 1, 2 or 4 GB – this
  in combination with the values for crashkernel.

  Trying to start the kdump service:
  root@ubuntu1410i386:~# /etc/init.d/kdump-tools start
  Starting kdump-tools: Could not find a free area of memory of 0x9f000 bytes...
  locate_hole failed
  * failed to load kdump kernel

  root@ubuntu1410i386:~# cat /sys/kernel/kexec_crash_loaded

  If the conversion from hex to dec is right, the mentioned memory mapping of 0x9f000 bytes is equal to 651264 (bytes), so under 1MB. This is not then related to the RAM allocation nor the crashkernel value used.
  AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: i386
  ArecordDevices: Error: [Errno 2] No such file or directory
  CRDA: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 14.10
  HibernationDevice: RESUME=UUID=5a5d0aa4-b8ee-4bf7-b1b9-761b7d1550b6
  InstallationDate: Installed on 2014-10-31 (37 days ago)
  InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release i386 (20141022.2)
   lo        no wireless extensions.
   eth0      no wireless extensions.
  Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
  MachineType: Microsoft Corporation Virtual Machine
  Package: linux (not installed)
   PATH=(custom, no user)
  ProcFB: 0 hyperv_fb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=83fb481a-8898-4adc-bf31-4e160f5f0ce8 ro crashkernel=128M-:64M
  ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
   linux-restricted-modules-3.16.0-24-generic N/A
   linux-backports-modules-3.16.0-24-generic  N/A
   linux-firmware                             1.138
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  utopic
  Uname: Linux 3.16.0-24-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
   Dec  8 08:16:46 ubuntu1410i386 dhclient: DHCPREQUEST of on eth0 to port 67 (xid=0x4b67ffa3)
   Dec  8 08:16:46 ubuntu1410i386 dhclient: DHCPACK of from
   Dec  8 08:16:47 ubuntu1410i386 dhclient: bound to -- renewal in 13914 seconds.
   Dec  8 10:10:47 ubuntu1410i386 kernel: [1840786.031060] init: tty1 main process ended, respawning
  _MarkForUpload: True
  dmi.bios.date: 05/23/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 090006
  dmi.board.name: Virtual Machine
  dmi.board.vendor: Microsoft Corporation
  dmi.board.version: 7.0
  dmi.chassis.asset.tag: 7176-0455-3377-8479-3268-6677-66
  dmi.chassis.type: 3
  dmi.chassis.vendor: Microsoft Corporation
  dmi.chassis.version: 7.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr090006:bd05/23/2012:svnMicrosoftCorporation:pnVirtualMachine:pvr7.0:rvnMicrosoftCorporation:rnVirtualMachine:rvr7.0:cvnMicrosoftCorporation:ct3:cvr7.0:
  dmi.product.name: Virtual Machine
  dmi.product.version: 7.0
  dmi.sys.vendor: Microsoft Corporation

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