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[Chris J Arges <1364427@xxxxxxxxxxxxxxxxxx>]

I was able to get a crash dump with the above patch (but didn't test
crash on the dump file itsself), but I'll check the above since I'm sure
they affect the dump format and actually using crash.

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

Title:
  kexec-tools: kexeced kernel hung

Status in “kexec-tools” package in Ubuntu:
  In Progress
Status in “kexec-tools” source package in Trusty:
  In Progress
Status in “kexec-tools” source package in Utopic:
  In Progress

Bug description:
  SRU Justification:

  [Impact]
  Users of ppc64el hardware need the ability to use kexec kernels.

  [Test Case]
  1) apt-get install kexec-tools
  2) sudo kexec -l /boot/vmlinux --initrd=/boot/initrd.img
  3) sudo kexec -e
  4) Kernel should kexec into current kernel and work

  [Regression Potential]
  This patch backports the following patches from upstream kexec-tools:

  90853885a859 ppc64/purgatory: Device tree values should be read/stored
  2ca220389d21 kexec/ppc64: move to device tree version 17
  335bad77fb07 kexec/ppc64: disabling exception handling when building the
  45b33eb2e70c ppc64/kdump: Fix ELF header endianess

  These are all specific to powerpc architecture.

  --

  ---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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