[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: In Progress => Fix Released

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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Re: [Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Terry Rudd]

Hi Thadeu,

So it feels like we're "done" on this bug; fix released on the kernels
that make sense and not doing anything on the kernels that don't.  Is
that correct?

Thanks in advance,

Terry


On 12/21/2018 10:43 AM, Thadeu Lima de Souza Cascardo wrote:
> I have just marked this as Invalid for Bionic, as the crash version on
> Bionic is capable of analyzing 4.15 kernels (and older 4.13 kernels,
> even though no one should be using such kernels on Bionic).
> 
> If there are any bugs about specific functionalities on that Bionic
> crash version, please report it as a different bug. See, for example,
> https://bugs.launchpad.net/ubuntu-power-systems/+bug/1765660.
> 
> Cascardo.
> 
> ** Changed in: crash (Ubuntu Bionic)
>Status: In Progress => Invalid
>

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

I have just marked this as Invalid for Bionic, as the crash version on
Bionic is capable of analyzing 4.15 kernels (and older 4.13 kernels,
even though no one should be using such kernels on Bionic).

If there are any bugs about specific functionalities on that Bionic
crash version, please report it as a different bug. See, for example,
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1765660.

Cascardo.

** Changed in: crash (Ubuntu Bionic)
   Status: In Progress => Invalid

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

In summary, the xenial version should be able to analyze up to a 4.15
kernel. This is now about bringing that same version to bionic, so other
bugs in analyzing a 4.15 kernel are fixed.

Cascardo.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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Re: [Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Terry Rudd]

On 12/18/2018 06:36 AM, Thadeu Lima de Souza Cascardo wrote:
> Subscribed SRU team for their visibility, will ping them on IRC.
> 
So is this planned for SRU 19.04 or just fixed and enabled to be pulled
in for SRU?

Terry

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

Subscribed SRU team for their visibility, will ping them on IRC.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: Triaged => In Progress

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

The package is waiting for SRU approval on the -proposed queue. As I
have done more tests, I have asked Andy to look at it.

Cascardo.

** Changed in: crash (Ubuntu Bionic)
   Status: Triaged => In Progress

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: Fix Released => Triaged

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Steve Langasek]

An audit of package versions across Ubuntu releases shows that crash is
at a higher version number in xenial-updates than it is in bionic.  If
this was appropriate to SRU to xenial, then it also needs to be SRUed to
bionic so that users don't see inconsistent behavior on bionic for
upgrades vs. new installs.

** Changed in: crash (Ubuntu Bionic)
   Status: Fix Released => Triaged

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: Fix Committed => Fix Released

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Launchpad Bug Tracker]

This bug was fixed in the package crash - 7.2.3+real-1~16.04.1

---
crash (7.2.3+real-1~16.04.1) xenial; urgency=medium

  * Backport to xenial. LP: #1746088
- Build-Depends on debhelper 9.

 -- Thadeu Lima de Souza Cascardo   Tue, 26 Jun
2018 14:32:30 -0300

** Changed in: crash (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[bugproxy]

--- Comment From hbath...@in.ibm.com 2018-09-04 05:12 EDT---
crash tool version in proposed works fien with 4.15.0-33-generic kernel:

--
root@ltc-briggs1:/var/crash/201809040315# dpkg -l | grep crash
[...]
ii  crash 7.2.3+real-1~16.04.1  
 ppc64el  kernel debugging utility, allowing gdb like syntax
ii  kdump-tools   1:1.6.3-2~16.04.1 
 ppc64el  scripts and tools for automating kdump (Linux crash 
dumps)
[...]
root@ltc-briggs1:/var/crash/201809040315#
root@ltc-briggs1:/var/crash/201809040315#
root@ltc-briggs1:/var/crash/201809040315# uname -a
Linux ltc-briggs1 4.15.0-33-generic #36~16.04.1-Ubuntu SMP Wed Aug 15 17:18:19 
UTC 2018 ppc64le ppc64le ppc64le GNU/Linux
root@ltc-briggs1:/var/crash/201809040315#
root@ltc-briggs1:/var/crash/201809040315#
root@ltc-briggs1:/var/crash/201809040315#
root@ltc-briggs1:/var/crash/201809040315# crash 
/usr/lib/debug/boot/vmlinux-4.15.0-33-generic dump.201809040315

crash 7.2.3
Copyright (C) 2002-2017  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 
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-4.15.0-33-generic
DUMPFILE: dump.201809040315  [PARTIAL DUMP]
CPUS: 160
DATE: Tue Sep  4 03:15:08 2018
UPTIME: 00:04:15
LOAD AVERAGE: 0.90, 0.81, 0.33
TASKS: 1587
NODENAME: ltc-briggs1
RELEASE: 4.15.0-33-generic
VERSION: #36~16.04.1-Ubuntu SMP Wed Aug 15 17:18:19 UTC 2018
MACHINE: ppc64le  (2926 Mhz)
MEMORY: 256 GB
PANIC: "sysrq: SysRq : Trigger a crash"
PID: 3665
COMMAND: "bash"
TASK: c03c813a0580  [THREAD_INFO: c03c81478000]
CPU: 2
STATE: TASK_RUNNING (SYSRQ)

crash> bt
PID: 3665   TASK: c03c813a0580  CPU: 2   COMMAND: "bash"
#0 [c03c8147b830] crash_kexec at c01e4d34
#1 [c03c8147b870] oops_end at c0026318
#2 [c03c8147b8f0] bad_page_fault at c006b424
#3 [c03c8147b960] handle_page_fault at c000a650
Data Access [300] exception frame:
R0:  c07c2d14R1:  c03c8147bc50R2:  c16baa00
R3:  0063R4:  c01ff5c8ce18R5:  c01ff5ca4368
R6:  90009033R7:  0012R8:  0007
R9:  0001R10: R11: 90001003
R12: c07c1b60R13: c7a61600R14: 
R15: 2200R16: 10170dd0R17: 010036330288
R18: 10140568R19: 100c7000R20: 
R21: 1017dd78R22: 10140400R23: 
R24: 101532c0R25: 1017b628R26: c15b9aa8
R27: 0002R28: 0004R29: 0063
R30: c1542a9cR31: c15b9e68
NIP: c07c1b98MSR: 90009033OR3: c0008874
CTR: c07c1b60LR:  c07c2d14XER: 2000
CCR: 2824MQ:  0001DAR: 
DSISR: 4200 Syscall Result: 
#4 [c03c8147bc50] sysrq_handle_crash at c07c1b98
[Link Register] [c03c8147bc50] __handle_sysrq at c07c2d14
#5 [c03c8147bc70] __handle_sysrq at c07c2d14  (unreliable)
#6 [c03c8147bd10] write_sysrq_trigger at c07c34d0
#7 [c03c8147bd40] proc_reg_write at c046d55c
#8 [c03c8147bd70] __vfs_write at c03c1690
#9 [c03c8147bd90] vfs_write at c03c1904
#10 [c03c8147bde0] sys_write at c03c1c7c
#11 [c03c8147be30] system_call at c000b284
System Call [c01] exception frame:
R0:  0004R1:  7fffeae2d1d0R2:  7dea43927300
R3:  0001R4:  010036311408R5:  0002
R6:  101532c2R7:  010036311408R8:  
R9:  R10: R11: 
R12: R13: 7dea43a3af90
NIP: 7dea4386e09cMSR: 9000f033OR3: 0001
CTR:

[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

This was about analyzing a 4.13 kernel on xenial, which meant a linux-
hwe kernel, now on version 4.15.0-30.32~16.04.1.

Can you verify the fix with a linux-hwe kernel?

Thank you very much.
Cascardo.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

Hi, can you just verify this with xenial-proposed and mark it as
verified?

Thank you very much.
Cascardo.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

** Tags added: verification-needed verification-needed-xenial

** Tags removed: triage-a
** Tags added: triage-g

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: In Progress => Fix Committed

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

** Tags removed: triage-g verification-needed verification-needed-xenial
** Tags added: triage-a

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Łukasz Zemczak]

Hello bugproxy, or anyone else affected,

Accepted crash into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/crash/7.2.3+real-1~16.04.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: crash (Ubuntu Xenial)
   Status: New => Fix Committed

** Tags added: verification-needed verification-needed-xenial

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Manoj Iyer]

** Changed in: crash (Ubuntu Artful)
   Status: In Progress => Won't Fix

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

** Description changed:

+ [Impact]
+ It won't be possible to analyze dumps produced by newer kernels (hwe on 
xenial, for example).
+ 
+ [Test Case]
+ Tested that this version of crash can analyze both GA (4.4) and hwe (4.15) 
kernels.
+ 
+ [Regression Potential]
+ New crash versions may have bugs and some commands not work with older 
kernels. The smoke test helps a little, but more testing may be desirable.
+ 
+ 
  ---Problem Description---
  Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel 
(Ubuntu 16.04.4)
-  
+ 
  ---uname output---
  Linux ltc-briggs1 4.13.0-26-generic #29~16.04.2-Ubuntu SMP Tue Jan 9 21:40:36 
UTC 2018 ppc64le ppc64le ppc64le GNU/Linux
-  
- Machine Type = 8001-22C 
-   
+ 
+ Machine Type = 8001-22C
+ 
  ---Steps to Reproduce---
-  This bug follow up bug of 
https://bugzilla.linux.ibm.com/show_bug.cgi?id=163565
- The steps to create dump is as follows 
+  This bug follow up bug of 
https://bugzilla.linux.ibm.com/show_bug.cgi?id=163565
+ The steps to create dump is as follows
  
- Once you generate the kdump 
- use crash to analyze the vmcore and we get this error 
+ Once you generate the kdump
+ use crash to analyze the vmcore and we get this error
  
  console logs ==
  
  root@ltc-briggs1:/var/crash/201801150227# ls
  dmesg.201801150227  vmcore.201801150227
  .0-26-generic vmcore.2018011502271150227# crash 
/usr/lib/debug/boot/vmlinux-4.13.
  
  crash 7.1.4
  Copyright (C) 2002-2015  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 
  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"...
  
- please wait... (gathering module symbol data)   
+ please wait... (gathering module symbol data)
  WARNING: cannot access vmalloc'd module memory
  
- 
  crash: invalid structure member offset: thread_info_task
-FILE: task.c  LINE: 598  FUNCTION: irqstacks_init()
+    FILE: task.c  LINE: 598  FUNCTION: irqstacks_init()
  
  [/usr/bin/crash] error trace: 1008ade0 => 1011552c => 1017d220 =>
  100833e0
  
-   100833e0: (undetermined)
-   1017d220: OFFSET_verify+80
-   1011552c: task_init+5084
-   1008ade0: main_loop+336
+   100833e0: (undetermined)
+   1017d220: OFFSET_verify+80
+   1011552c: task_init+5084
+   1008ade0: main_loop+336
  
  == Comment from Hari Krishna Bathini ==
  
  There are quite a few commits (all available upstream) that are needed for
  crash tool to work fine. I think the right thing to do here would be to use
  the latest crash tool version 7.2.0 to go with the kernel update. Also, the
  below commit would be needed on top of 7.2.0 crash utility:
  
-   commit c8178eca9c74f81a7f803a58d339635cc152e8d9
-   Author: Dave Anderson 
-   Date:   Thu Nov 9 11:39:05 2017 -0500
+   commit c8178eca9c74f81a7f803a58d339635cc152e8d9
+   Author: Dave Anderson 
+   Date:   Thu Nov 9 11:39:05 2017 -0500
  
- Update for support of Linux 4.14 and later PPC64 kernels where the
- hash page table geometry accomodates a larger virtual address range.
- Without the patch, the virtual-to-physical translation of user space
- virtual addresses by "vm -p", "vtop", and "rd -u" may generate an
- invalid translation or otherwise fail.
- (hbath...@linux.vnet.ibm.com)
+ Update for support of Linux 4.14 and later PPC64 kernels where the
+ hash page table geometry accomodates a larger virtual address range.
+ Without the patch, the virtual-to-physical translation of user space
+ virtual addresses by "vm -p", "vtop", and "rd -u" may generate an
+ invalid translation or otherwise fail.
+ (hbath...@linux.vnet.ibm.com)
  
  Similar thing holds true for makedumpfile tool..
  
  Thanks
  Hari

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

There is a package on ppa:cascardo/ppa that should fix the problem. Can
you test it and report back?

Cascardo.

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  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

I have been working on the backport for this to xenial, but in order to
do so, we are taking care of some build failures on the latest version
that we are going to add to cosmic. I'll update when there is more
progress on that.

Regards.
Cascardo.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Manoj Iyer]

** Tags removed: triage-a
** Tags added: triage-g

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Frank Heimes]

** Tags removed: triage-g
** Tags added: triage-a

** Changed in: ubuntu-power-systems
   Status: Triaged => In Progress

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Dimitri John Ledkov]

@breno re: point release meaning vs updates

Please note point releases refer to installation media only, which is a
consistent snapshot of cloud images, container images, server ISO, d-i,
etc. Built from xenial-updates & xenial-security pockets as published at
the time of the respin. xenial-updates/-security themselves are a moving
target.

It's impossible to ship something in "16.04.2" today, as there is no
package archive that refers to "16.04.2". One simply continuously ships
updates in xenial-updates.

Thus the point of point-releases installation media, is to have
installers available with a newer kernel which hopefully supports more
hardware, and newer packages making post-install security/updates
upgrades quicker & smaller, as one does not need to catch up 2 years+ of
updates, just a few weeks of updates.

This issue does not appear to impact the installation media /
installation success, therefore it is not critical to ship in
installation media as respun for a point release. Hence it is targetted
to ship simply as any other SRU in xenial-updates.

Once the solution to this bug is found that is.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

>--- Comment From bren...@br.ibm.com 2018-03-05 09:46 EDT---
>Hi Cascardo,
>
>(In reply to comment #19)
>> We are working on getting those fixes to 16.04, on the -updates repository.
>> But it's not part of 16.04.4.
>
>I am not sure I understood the following statement. Do you mean that the fix 
>will be pushed to >-updates archive after the 16.04.4, thus, it will not make 
>the 16.04.4 cut date?
>
>If that is the case, that might cause some impacts, because we are making a 
>release that contains >some known regressions. Should we document it somewhere?
>
>Thank you,
>Breno

Hi, Breno.

>From my testing on xenial and hwe kernel, kexec still works and
makedumpfile will fallback to cp. Then, one can copy that dump to a
bionic system and use crash from bionic to analyze it. Can you test that
such a produced dump can be analyzed by crash on bionic? I want to make
sure we are still producing valid dumps on most cases, or identify when
dumps are not valid. Some of the hwe kernels with kpti backports are not
dumpable, but the next artful and hwe release, to be in -proposed by
next week, should have that fixed in the kernel side.

I am still investigating the possibility of getting all this into a
better situation, but I want to make sure that the current situation is
not that bad as you are saying.

Thanks.
Cascardo.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Andrew Cloke]

The first area of investigation is to see if we can bump the versions of
kexec and makedumpfile for Xenial. Thadeu is investigating.

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  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Frank Heimes]

** Tags added: ppc64el-kdump

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

** Changed in: crash (Ubuntu Artful)
   Status: New => In Progress

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Manoj Iyer]

** Changed in: crash (Ubuntu Xenial)
 Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

** Changed in: crash (Ubuntu Artful)
 Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

** Changed in: crash (Ubuntu Xenial)
   Importance: Undecided => Critical

** Changed in: crash (Ubuntu Artful)
   Importance: Undecided => Critical

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

We are working on getting those fixes to 16.04, on the -updates
repository. But it's not part of 16.04.4.

Cascardo.

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

By the way, it's already available on bionic, you need to update the
system.

Cascardo.

** Changed in: crash (Ubuntu Bionic)
   Status: In Progress => Fix Released

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Joseph Salisbury]

** Also affects: crash (Ubuntu Artful)
   Importance: Undecided
   Status: New

** Also affects: crash (Ubuntu Bionic)
   Importance: Critical
 Assignee: Thadeu Lima de Souza Cascardo (cascardo)
   Status: In Progress

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

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Thadeu Lima de Souza Cascardo]

I am working on getting this on bionic, and will work to get this to
xenial as well.

Cascardo.

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

** Changed in: crash (Ubuntu)
 Assignee: Canonical Kernel Team (canonical-kernel-team) => Thadeu Lima de 
Souza Cascardo (cascardo)

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Manoj Iyer]

** Changed in: crash (Ubuntu)
 Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) => 
Canonical Kernel Team (canonical-kernel-team)

** Changed in: ubuntu-power-systems
   Status: New => Triaged

** Changed in: crash (Ubuntu)
   Importance: Undecided => Critical

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Title:
  [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on
  4.13.0-26-generic kernel

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[Bug 1746088] Re: [Ubuntu 16.04.4] Unable to analyze the vmcore generated by kdump on 4.13.0-26-generic kernel

[Frank Heimes]

** Also affects: ubuntu-power-systems
   Importance: Undecided
   Status: New

** Changed in: ubuntu-power-systems
   Importance: Undecided => Critical

** Changed in: ubuntu-power-systems
 Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

** Tags added: triage-g

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