------- Comment From pt...@cn.ibm.com 2016-10-12 22:15 EDT-------
(In reply to comment #21)
> I saw that the crash package is already included in the -proposed archive.
> Can you test with it?
> $ apt-cache madison crash
>      crash | 7.1.5-1ubuntu2 | http://us.ports.ubuntu.com/ubuntu-ports
> yakkety-proposed/main ppc64el Packages

This bug has been fixed on the new version. Thanks.

** Tags removed: targetmilestone-inin---
** Tags added: targetmilestone-inin1610

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  ISST-LTE:pVM:roselp2:ubuntu 16.10: crash failed to check vmcore of 4.8

Status in crash package in Ubuntu:
  In Progress

Bug description:
  == Comment: #0 - Ping Tian Han  - 2016-09-22 03:05:36 ==
  ---Problem Description---
  crash cannot check vmcore of 4.8 kernel. 

  Then when trying to check the core with crash:

  % sudo crash /usr/lib/debug/boot/vmlinux-4.8.0-14-generic

  crash 7.1.5
  Copyright (C) 2002-2016  Red Hat, Inc.
  Copyright (C) 2004, 2005, 2006, 2010  IBM Corporation
  Copyright (C) 1999-2006  Hewlett-Packard Co
  Copyright (C) 2005, 2006, 2011, 2012  Fujitsu Limited
  Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
  Copyright (C) 2005, 2011  NEC Corporation
  Copyright (C) 1999, 2002, 2007  Silicon Graphics, Inc.
  Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
  This program is free software, covered by the GNU General Public License,
  and you are welcome to change it and/or distribute copies of it under
  certain conditions.  Enter "help copying" to see the conditions.
  This program has absolutely no warranty.  Enter "help warranty" for details.

  GNU gdb (GDB) 7.6
  Copyright (C) 2013 Free Software Foundation, Inc.
  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
  This is free software: you are free to change and redistribute it.
  There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
  and "show warranty" for details.
  This GDB was configured as "powerpc64le-unknown-linux-gnu"...

  please wait... (gathering kmem slab cache data)
  crash: invalid kernel virtual address: 7aa9fe01000000  type: "pmd page"

  ---uname output---
  Linux roselp2 4.8.0-14-generic #15-Ubuntu SMP Tue Sep 20 21:59:33 UTC 2016 
ppc64le ppc64le ppc64le GNU/Linux
  Machine Type = IBM,8286-42A, lpar 
  ---Steps to Reproduce---
   1. install 4.8 kernel
  2. trigger kdump to get vmcore
  3. check the vmcore with crash

  == Comment: #8 - Hari Krishna Bathini  - 2016-09-24 14:12:23 ==
  The below commit is needed for vtop address translation to succeed

    commit 182914debbb9a2671ef644027fedd339aa9c80e0
    Author: Dave Anderson <ander...@redhat.com>
    Date:   Fri Sep 23 09:09:15 2016 -0400

      With the introduction of radix MMU in Power ISA 3.0, there are
      changes in kernel page table management accommodating it.  This patch
      series makes appropriate changes here to work for such kernels.
      Also, this series fixes a few bugs along the way:
        ppc64: fix vtop page translation for 4K pages
        ppc64: Use kernel terminology for each level in 4-level page table
        ppc64/book3s: address changes in kernel v4.5
        ppc64/book3s: address change in page flags for PowerISA v3.0
        ppc64: use physical addresses and unfold pud for 64K page size
        ppc64/book3s: support big endian Linux page tables
      The patches are needed for Linux v4.5 and later kernels on all
      ppc64 hardware.

  Also, the below commit is needed

    commit 8ceb1ac628bf6a0a7f0bbfff030ec93081bca4cd
    Author: Dave Anderson <ander...@redhat.com>
    Date:   Mon May 23 11:23:01 2016 -0400

      Fix for Linux commit 0139aa7b7fa12ceef095d99dc36606a5b10ab83a, which
      renamed the page._count member to page._refcount.  Without the patch,
      certain "kmem" commands fail with the "kmem: invalid structure member
      offset: page_count".


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