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[Bug 1741860] Re: Use the kernel default for crashkernel offset

 

Hi Hari and Mamatha,

I made a test package for kdump-tools with "@128M" removed from the end
of kdump-tools.cfg. This test package is for Eoan as requested in
Launchpad Bug Comment #9 (although this package is not in the proposed
repository, it will have to be installed manually with `dpkg -i kdump-
tools_1.6.5-1ubuntu3.1_ppc64el.deb`)

The test package is located here:
https://kernel.ubuntu.com/~connor/LP1741860-crashkernel/eoan/

If everything looks okay on your end, I will proceed with SRU'ing this
fix to the other Ubuntu releases.

Thanks,

Connor

** Also affects: makedumpfile (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: makedumpfile (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Also affects: makedumpfile (Ubuntu Eoan)
   Importance: High
     Assignee: Thadeu Lima de Souza Cascardo (cascardo)
       Status: Confirmed

** Also affects: makedumpfile (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Changed in: makedumpfile (Ubuntu Disco)
       Status: New => In Progress

** Changed in: makedumpfile (Ubuntu Eoan)
       Status: Confirmed => In Progress

** Changed in: makedumpfile (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: makedumpfile (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: makedumpfile (Ubuntu Xenial)
     Assignee: (unassigned) => Connor Kuehl (connork)

** Changed in: makedumpfile (Ubuntu Bionic)
     Assignee: (unassigned) => Connor Kuehl (connork)

** Changed in: makedumpfile (Ubuntu Disco)
     Assignee: (unassigned) => Connor Kuehl (connork)

** Changed in: makedumpfile (Ubuntu Eoan)
     Assignee: Thadeu Lima de Souza Cascardo (cascardo) => Connor Kuehl (connork)

** Changed in: makedumpfile (Ubuntu Disco)
   Importance: Undecided => High

** Changed in: makedumpfile (Ubuntu Bionic)
   Importance: Undecided => High

** Changed in: makedumpfile (Ubuntu Xenial)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1741860

Title:
  Use the kernel default for crashkernel offset

Status in The Ubuntu-power-systems project:
  Confirmed
Status in makedumpfile package in Ubuntu:
  In Progress
Status in makedumpfile source package in Xenial:
  In Progress
Status in makedumpfile source package in Bionic:
  In Progress
Status in makedumpfile source package in Disco:
  In Progress
Status in makedumpfile source package in Eoan:
  In Progress

Bug description:
  == Comment: #0 - Hari Krishna Bathini <hbathini@xxxxxxxxxx> - 2018-01-08 01:06:41 ==
  ---Problem Description---
  A default offset of 128MB is enforced for crashkernel by kdump-tools utility
  overriding the kernel default.

  While the kernel default offset for crashkernel is also 128MB, that may change
  and the right thing to do would be to let the kernel decide on the offset of
  crashkernel in the default scenario.. 

  Get rid of "@128M" in kdump-tools.cfg file

   
  Contact Information = hbathini@xxxxxxxxxx 
   
  ---uname output---
  na
   
  Machine Type = na 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   # cat /etc/default/grub.d/kdump-tools.cfg 
  GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M@128M"
  ---

  The offset is specified via kdump-tools where as the kernel may be the right place to
  set an offset by default..

   
  Userspace tool common name: kdump-tools 
   
  The userspace tool has the following bit modes: 64-bit 

  Userspace rpm: kdump-tools

  Userspace tool obtained from project website:  na 
   
  *Additional Instructions for hbathini@xxxxxxxxxx:
  -Attach ltrace and strace of userspace application.

  == Comment: #3 - MAMATHA INAMDAR <mainamdar@xxxxxxxxxx> - 2018-01-08 03:05:05 ==
  This bug is opened to follow-up other bug based on the comment 19
  https://bugzilla.linux.ibm.com/show_bug.cgi?id=152905#c19 (Canonical Launchpad 	1676884 )

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