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[Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx>]

Please note that this bug is affecting both 14.04 and 14.10.

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https://bugs.launchpad.net/bugs/1364427

Title:
  kexeced kernel hung

Status in “kexec-tools” package in Ubuntu:
  New

Bug description:
  ---Problem Description---
  kexec is not working with kernel 3.16 or later.

  The root cause is missing patch in the kexec-tools package provided with Ubuntu 14.04 and 14.10.
   
  ---uname output---
  Linux qemu 3.16.0-10-generic #15-Ubuntu SMP Thu Aug 21 16:32:31 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = P8 
    
  ---Steps to Reproduce---
  On a 14.10 guest or host, run :
  $ sudo kexec -l /boot/vmlinux --initrd=/boot/initrd.img-3.16.0-10-generic
  $ sudo kexec -e

  The kexeced kernel will hang here :
  [  300.002862] Starting new kernel
  I'm in purgatory

   
  The root cause is the following kexec-tools's patch missing:
  2ca220389d21 kexec/ppc64: move to device tree version 17

  This patch is required to kexec kernel 3.16 and later.

  Among this patch, the following upstream pactches should be added to the current package  :
  335bad77fb07 kexec/ppc64: disabling exception handling when building the purgato
  90853885a859 ppc64/purgatory: Device tree values should be read/stored in Big En

  In addition the following incoming patch should be applied :
  ppc64/kdump: Fix ELF header endianess (http://lists.infradead.org/pipermail/kexec/2014-July/012247.html)

  Another option to consider is to move to kexec-tools 2.0.7, and to
  apply the missing patches

  Is it possible to get this patches also applied to the kexec-tools
  shipped with 14.04 ?

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