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---Steps to Reproduce---
1) Using latest daily ISO install 14.04.02 as a Power VM guest. The LPAR has vTPM functionality enabled.
2) Upgrade the kernel to 3.19 level (3.19.0-18-generic)
3) Configure kdump. A fix is required to configure kdump. Refer to defect (https://bugzilla.linux.ibm.com/show_bug.cgi?id=125712)
4) Trigger a dump. Dump is captured successfully.
5) Install dbgsym package for the kernel
6) Use crash to analyze the dump.

Crash tool is able to read the dump. But it fails to list back trace for
CPUS using bt command.

# crash /usr/lib/debug/boot/vmlinux-3.19.0-18-generic dump.201506040624

crash 7.0.3
Copyright (C) 2002-2013  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"...

      KERNEL: /usr/lib/debug/boot/vmlinux-3.19.0-18-generic
    DUMPFILE: dump.201506040624  [PARTIAL DUMP]
        CPUS: 16
        DATE: Wed Dec 31 19:00:00 1969
      UPTIME: 00:02:32
LOAD AVERAGE: 0.01, 0.01, 0.01
       TASKS: 245
    NODENAME: alp9
     RELEASE: 3.19.0-18-generic
     VERSION: #18~14.04.1-Ubuntu SMP Wed May 20 09:40:36 UTC 2015
     MACHINE: ppc64le  (3724 Mhz)
      MEMORY: 100 GB
       PANIC: "Oops: System Reset, sig: 6 [#1]" (check log for details)
         PID: 0
     COMMAND: "swapper/0"
        TASK: c0000000013cca80  (1 of 16)  [THREAD_INFO: c000000001448000]
         CPU: 0
       STATE: TASK_RUNNING (PANIC)

crash> bt -a
PID: 0      TASK: c0000000013cca80  CPU: 0   COMMAND: "swapper/0"

PID: 0      TASK: c0000003dbf3b3c0  CPU: 1   COMMAND: "swapper/1"

PID: 0      TASK: c0000003dbf39f00  CPU: 2   COMMAND: "swapper/2"

PID: 0      TASK: c0000003dbf38a40  CPU: 3   COMMAND: "swapper/3"

PID: 0      TASK: c0000003dbf37580  CPU: 4   COMMAND: "swapper/4"

PID: 0      TASK: c0000003dbf360c0  CPU: 5   COMMAND: "swapper/5"

PID: 0      TASK: c0000003dbf34c00  CPU: 6   COMMAND: "swapper/6"

PID: 0      TASK: c0000003dbf33740  CPU: 7   COMMAND: "swapper/7"

PID: 0      TASK: c0000003dbf32280  CPU: 8   COMMAND: "swapper/8"

PID: 0      TASK: c0000003dbf30dc0  CPU: 9   COMMAND: "swapper/9"

PID: 0      TASK: c0000003dbf2f900  CPU: 10  COMMAND: "swapper/10"

PID: 0      TASK: c0000003dbf2e440  CPU: 11  COMMAND: "swapper/11"

PID: 0      TASK: c0000003dbf2cf80  CPU: 12  COMMAND: "swapper/12"

PID: 0      TASK: c0000003dbf2bac0  CPU: 13  COMMAND: "swapper/13"

PID: 0      TASK: c0000003dbf2a600  CPU: 14  COMMAND: "swapper/14"

PID: 0      TASK: c0000003dbf29140  CPU: 15  COMMAND: "swapper/15"
crash> bt
PID: 0      TASK: c0000000013cca80  CPU: 0   COMMAND: "swapper/0"
crash>

== Comment: #5 - Hari Krishna Bathini <hbathini@xxxxxxxxxx> - 2015-06-08 00:31:41 ==
The fix patch is upstream in crash git repo
git://github.com/crash-utility/crash.git
commit id: dc4ea682a21567dd9d093862ec54eb8529199c05
It is part of upstream crash version 7.1.0.

Thanks
Hari

** Affects: makedumpfile (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: architecture-ppc64le bot-comment bugnameltc-125880 severity-medium targetmilestone-inin---
-- 
crash subcommand bt -a displays incomplete information
https://bugs.launchpad.net/bugs/1463653
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