linux-meta: enable linux-crashdump for ppc64el

[bugproxy]

SRU Justification:

[Impact]
Users of ppc64el hardware need the ability to use crashdumps to do kernel debugging.

[Test Case]
Taken from:
https://wiki.ubuntu.com/Kernel/CrashdumpRecipe
https://help.ubuntu.com/14.04/serverguide/kernel-crash-dump.html

1) apt-get install linux-crashdump
2) increase crashdump size:
sudo vim /etc/default/grub.d/kexec-tools.cfg
set crashkernel=1024M
sudo update-grub
3) reboot the machine
4) sudo sed -i 's/USE_KDUMP=0/USE_KDUMP=1/g' /etc/default/kdump-tools
5) kdump-config show # should return no errors
6) echo 'c' | sudo tee /proc/sysrq-trigger
7) This should crash the machine and we should kexec into another kernel to dump the core, then on the next reboot we should see a crash in /var/crash/*

[Regression Potential]
Part of the fix involves adding a NEW package for ppc64el to allow linux-crashdump binary package to be built from linux-meta.

--

Problem Description :
====================
I was trying to configure kdump and got below link

https://help.ubuntu.com/12.04/serverguide/kernel-crash-dump.html
As per above link we need to install linux-crashdump pckg but it seems it is not included in repo as when I tried to install it then it failed with that unable to locate it .

root@flyg4:~# apt-get install linux-crashdump
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-crashdump
root@flyg4:~#

root@flyg4:~# uname -a
Linux flyg4 3.13.0-30-generic #55-Ubuntu SMP Fri Jul 4 21:29:58 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
root@flyg4:~#

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

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[Chris J Arges (arges)]

- The linux-crashdump binary package in linux-meta needs to be adjusted for this arch.
- In addition the dependencies will need to be arch depended properly.
- Finally we'll need to ensure that the bootloader for this arch is adjusted properly to provide the 'crashkernel=X' parameter much like grub is already instrumented.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1341475

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2014-08-19 06:59 EDT-------
Hi Ubuntu,
any updates on the bug ?

Thanks.

[Chris J Arges (arges)]

There is also another issue:
Starting kdump-tools: Cannot open `/boot/vmlinuz-3.16.0-19-generic': No such file or directory
 * failed to load kdump kernel

Need to adjust for vmlinux.

[Chris J Arges (arges)]

Once we successfully configure makedumpfile/linux-meta with the proper settings, when we do actually try to crash with echo'ing c to sysrq-trigger we get crash then the machine hangs on the following:

[ 513.470444] Sending IPI to other CPUs
[ 513.471585] IPI complete
I'm in purgatory

I've also noticed that kexec works perfectly fine.

[Chris J Arges (arges)]

patch sent to ubuntu kernel-team ML

[Chris J Arges (arges)]

This has been committed to utopic/trusty ubuntu-*-meta trees.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-meta - 3.16.0.21.22

---------------
linux-meta (3.16.0.21.22) utopic; urgency=medium

  * UBUNTU: Make linux-crashdump build for ppc64el
    -LP: #1341475
  * linux ABI 3.16.0-21
 -- Tim Gardner <email address hidden> Mon, 06 Oct 2014 16:47:04 +0100

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-meta - 3.13.0.39.46

---------------
linux-meta (3.13.0.39.46) trusty; urgency=medium

  * linux ABI 3.13.0-39

linux-meta (3.13.0.38.45) trusty; urgency=medium

  [ Tim Gardner ]

  * UBUNTU: Make linux-crashdump build for ppc64el
    -LP: #1341475

  [ Luis Henriques ]

  * linux ABI 3.13.0-38
 -- Luis Henriques <email address hidden> Tue, 28 Oct 2014 13:16:51 +0000