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--- Comment From hbath...@in.ibm.com 2016-11-06 22:53 EDT---
*** Bug 147804 has been marked as a duplicate of this bug. ***

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Title:
  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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--- Comment From hbath...@in.ibm.com 2016-10-27 02:54 EDT---
(In reply to comment #42)
> Hopefully, we should get an ACK for the upstream bug soon, so I can push a
> new package to Debian. I will then proceed with the synchronization to Zesty
> and SRU to the other stable releases.
>
> I hope that this clarifies the situation.
>

Thanks for clarifying that, Louis.
That does help in appreciating the situation..

Regards,
Hari

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Title:
  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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--- Comment From hbath...@in.ibm.com 2016-10-20 15:21 EDT---
(In reply to comment #38)
>
> Hello,

Hello Loius,

>
> Not at the moment : simply adding this commit allow makedumpfile to run but
> it generates many other error messages that are currently investigated.

I couldn't reproduce it on powerpc. I tried on Ubuntu's 4.8.0-15 & 4.8.0-22 
kernels.
Maybe arch specific - in which case, it would be good to get an update for
makedumpfile package with this fix first?

Thanks
Hari

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Title:
  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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--- Comment From hbath...@in.ibm.com 2016-10-19 14:44 EDT---
(In reply to comment #19)
> Hello,
>
> Yes I have found that and included it into the upcoming makedumpfile
> package. But there are more issues wollowing the addition of this commit
> that I need to identify and fix.
>
> http://lists.infradead.org/pipermail/kexec/2016-September/017300.html

Hi Louis,

Any ETA for the updated makedumpfile package with fix
commit 2c21d4656e8d3c2af2b1e14809d076941ae69e96

Thanks
Hari

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Title:
  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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--- Comment From pavra...@in.ibm.com 2016-09-28 02:21 EDT---
Hi,

Tested with "4.8.0-17-generic" kernel. After crash machine did not hang and 
7.6G vmcore got captured.
but dmesg.201609270619 is not generated.

Logs
===
root@ubuntu:/var/crash/201609270619# uname -a
Linux ubuntu 4.8.0-17-generic #19-Ubuntu SMP Sun Sep 25 06:35:40 UTC 2016 
ppc64le ppc64le ppc64le GNU/Linux

root@ubuntu:/var/crash/201609270619# ls -lhrt
total 2.0G
-r 1 root root 7.6G Sep 27 06:20 vmcore.201609270619

# makedumpfile -l -d 31 /var/crash/201609270619/vmcore.201609270619 dump1
The kernel version is not supported.
The makedumpfile operation may be incomplete.
get_mem_map: Can't distinguish the memory type.

makedumpfile Failed.

With given makedump file

# ./makedumpfile -l -d 31 /var/crash/201609270619/vmcore.201609270619 dump1
The kernel version is not supported.
The makedumpfile operation may be incomplete.
Copying data   : [100.0 %] -

The dumpfile is saved to dump1.

makedumpfile Completed.

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Title:
  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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--- Comment From hbath...@in.ibm.com 2016-09-24 08:25 EDT---
Dump filtering for kernels v4.7+ is failing because of kernel commit 
0139aa7b7fa1
which changed _count to _refcount in struct page. The below makedumpfile tool
commit fixes this:

commit 2c21d4656e8d3c2af2b1e14809d076941ae69e96
Author: Vitaly Kuznetsov 
Date:   Fri Jun 17 18:41:26 2016 +0900

[PATCH v2] Support _count -> _refcount rename in struct page
_count member was renamed to _refcount in linux commit 0139aa7b7fa12
("mm: rename _count, field of the struct page, to _refcount") and this
broke makedumpfile. The reason for making the change was to find all users
accessing it directly and not through the recommended API. I tried
suggesting to revert the change but failed, I see no other choice than to
start supporting both _count and _refcount in makedumpfile.
Signed-off-by: Vitaly Kuznetsov 
--

Makedumpfile filtered dump successfully when the above commit is applied on top
of makedumpfile_1.6.0-2

# ./makedumpfile -l -d 31 /var/crash/201609230347/vmcore.201609230347 dump
The kernel version is not supported.
The makedumpfile operation may be incomplete.
Copying data   : [100.0 %] /

The dumpfile is saved to dump.

makedumpfile Completed.
#
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Thanks
Hari

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  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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--- Comment From ru...@us.ibm.com 2016-09-23 13:47 EDT---
We are still seeing the crc32c issue with the 4.8.0-15, so I mirrored over a 
related bug to keep the two issues separate.  The crc32c issue is being tracked 
in Bug 146645 / LP Bug 1627126

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Title:
  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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--- Comment From ru...@us.ibm.com 2016-09-22 09:12 EDT---
Hi Louis.

We are getting other bug reports against the missing crc32c module for
ppc64le.  Would it be better to open up a different LP for that specific
issue to keep the missing module and makedumpfile issues separate?

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Title:
  Ubuntu 16.10: kdump is not working in 4.8 kernel.

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