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[Launchpad Bug Tracker <1655280@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package makedumpfile -
1:1.6.5-1ubuntu1~18.04.1

---------------
makedumpfile (1:1.6.5-1ubuntu1~18.04.1) bionic; urgency=low

  * Backport back to bionic. (LP: #1655280) (LP: #1790788)

makedumpfile (1:1.6.5-1ubuntu1) disco; urgency=low

  [ Ubuntu Merge-o-Matic ]
  * Merge from Debian unstable.  Remaining changes:
    - Bump amd64 crashkernel from 384M-:128M to 512M-:192M.

  [ Thadeu Lima de Souza Cascardo ]
  * Use a different service for vmcore dump. (LP: #1811692)

makedumpfile (1:1.6.5-1) unstable; urgency=medium

  * Update to new upstream version 1.6.5.
  * debian: remove debian/source/local-options
  * [i18n] Move PT debconf translation (Closes: #910465)

makedumpfile (1:1.6.4-3) unstable; urgency=medium

  * Reload kdump after memory/CPU hotplug. (LP: #1655280)
  * Fix adding crashkernel to zipl.conf when no quotation mark is used.
    (LP: #1790788)

 -- Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>  Thu, 07 Feb
2019 09:22:23 -0200

** Changed in: makedumpfile (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1655280

Title:
  ISST-LTE:pVM:roselp4:ubuntu 16.04: cp: error reading '/proc/vmcore':
  Bad address when trying to dump vmcore

Status in The Ubuntu-power-systems project:
  In Progress
Status in linux package in Ubuntu:
  Invalid
Status in makedumpfile package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Invalid
Status in makedumpfile source package in Xenial:
  New
Status in linux source package in Bionic:
  Invalid
Status in makedumpfile source package in Bionic:
  Fix Released
Status in linux source package in Cosmic:
  Invalid
Status in makedumpfile source package in Cosmic:
  Fix Released
Status in linux source package in Disco:
  Invalid
Status in makedumpfile source package in Disco:
  Fix Released

Bug description:
  [Impact]
  After a DLPAR memory/CPU add/remove operation, kdump tools need to be restarted or else kdump tools will fail to capture the crash. 

  [Test]

  == Comment: #0 - Ping Tian Han <pthan@xxxxxxxxxx> - 2017-01-09 02:51:00 ==
  ---Problem Description---
  Vmcore cannot be saved when triggering bug 150353 on roselp4:

  Copying data                       : [  2.0 %] \/usr/sbin/kdump-config: line 591:  5502 Bus error               makedumpfile $MAKEDUMP_ARGS $vmcore_file $KDUMP_CORETEMP
  [  512.833872] kdump-tools[5450]:  * kdump-tools: makedumpfile failed, falling back to 'cp'
  [  573.595449] kdump-tools[5450]: cp: error reading '/proc/vmcore': Bad address
  [  573.605717] kdump-tools[5450]:  * kdump-tools: failed to save vmcore in /var/crash/201701090223
  [  573.765417] kdump-tools[5450]:  * running makedumpfile --dump-dmesg /proc/vmcore /var/crash/201701090223/dmesg.201701090223
  [  574.285506] kdump-tools[5450]: The kernel version is not supported.
  [  574.285672] kdump-tools[5450]: The makedumpfile operation may be incomplete.
  [  574.285767] kdump-tools[5450]: The dmesg log is saved to /var/crash/201701090223/dmesg.201701090223.
  [  574.305422] kdump-tools[5450]: makedumpfile Completed.
  [  574.315363] kdump-tools[5450]:  * kdump-tools: saved dmesg content in /var/crash/201701090223
  [  574.615688] kdump-tools[5450]: Mon, 09 Jan 2017 02:24:26 -0600
  [  574.705384] kdump-tools[5450]: Rebooting.
           Stopping ifup for ib0...
  [  OK  ] Stopped ifup for ib0.
  [ 1008.579897] reboot: Restarting system

  Contact Information = Ping Tian Han/pthan@xxxxxxxxxx Carrie
  Mitsuyoshi/carriemi@xxxxxxxxxx

  ---uname output---
  Linux roselp4 4.8.0-34-generic #36~16.04.1-Ubuntu SMP Wed Dec 21 18:53:20 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = lpar

  ---Debugger---
  A debugger is not configured

  ---Steps to Reproduce---
   1. config kdump on roselp4
  2. try to trigger bug 150353

  *Additional Instructions for Ping Tian Han/pthan@xxxxxxxxxx Carrie Mitsuyoshi/carriemi@xxxxxxxxxx:
  -Post a private note with access information to the machine that the bug is occuring on.

  == Comment: #3 - Brahadambal Srinivasan <brsriniv@xxxxxxxxxx> -
  2017-01-10 02:42:25 ==

  root@roselp4:~# cat /proc/cmdline
  BOOT_IMAGE=/boot/vmlinux-4.8.0-34-generic root=UUID=0bcf3431-df8b-499c-9a13-33070f242e0c ro splash quiet crashkernel=384M-:512M

  root@roselp4:~# dmesg | grep Reser
  [    0.000000] Reserving 512MB of memory at 128MB for crashkernel (System RAM: 21760MB)

  [Regression Potential]
  The fix applies to makedumpfile, and could impact dump capture.

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