** Also affects: kexec-tools (Ubuntu Wily)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Wily)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Wily)
Status: New => Confirmed
** Changed in: linux (Ubuntu Wily)
Importance: Undecided
Everything is working as expected on Ubuntu 14.04.4.
/sys/kernel/kexec_crash_loaded is 1; memory is assigned; vmcore dump file is
written
Hyper-V: Server 2012 R2
VM: Ubuntu 14.04.4
Kernel: 4.2.0-21-generic
crashkernel value: 384M
I've also tested Ubuntu 15.10 but the VM does not reboot after I
15.04 was EOL in February[0]. Is this still happening with an up to
date Wily release, or 14.04.3 environment?
[0] https://wiki.ubuntu.com/Releases
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To summarize all previous activity on this bug for easier tracking, I've
re-done now a check on this bug and here are the details:
Hyper-V: Server 2012 R2
VM: Ubuntu 15.04
Kernel: 3.19.0-15
Default crashkernel value: 384M-:128M
Also verified with crashkernel=384M@384M
Status: kdump-tools is
I've tested the new kernel and the same problems perpetuates no matter
of the VM's RAM or crashkernel size.
Trying to start the kdump service:
root@ubuntu:~# /etc/init.d/kdump-tools start
Starting kdump-tools: Could not find a free area of memory of 0x9f000 bytes...
locate_hole failed
* failed to
There is now a fix for bug 1440103. Can you test the kernel from that
bug and see if it also fixes this bug? It can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1440103/vivid/32bit/
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** No longer affects: linux (Ubuntu Utopic)
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 and 15.04
** Changed in: kexec-tools (Ubuntu Utopic)
Status: Confirmed => Invalid
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Title:
[Hyper-V] Kernel panic not functional
** Changed in: linux (Ubuntu Vivid)
Status: In Progress => Confirmed
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Title:
[Hyper-V] Kernel panic not functional on
I tested the kernel from http://kernel.ubuntu.com/~jsalisbury/lp1400319/ on
Ubuntu 15.04 32bit and the problem still exists.
After installing the test kernel, kdump is running but doesn't update kexec:
root@ubuntu:~# /etc/init.d/kdump-tools status
● kdump-tools.service - Kernel crash dump
** Changed in: linux (Ubuntu Utopic)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Vivid)
Assignee: (unassigned) => Joseph Salisbury (jsalisbury)
** Changed in: linux (Ubuntu Utopic)
Status: Confirmed => In Progress
** Changed in: linux
I built a 32 bit Vivid test kernel with the patches listed in bug
1440103. The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1400319/
Note, you would need to install both the linux-image and linux-image-
extra .deb packages.
Thanks!
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** Changed in: linux (Ubuntu Utopic)
Status: In Progress => Invalid
** Changed in: linux (Ubuntu Utopic)
Assignee: Joseph Salisbury (jsalisbury) => (unassigned)
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Hi Joe,
Can you please let us know when the test kernel is ready so that we can give it
a try.
Thank you!
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Title:
[Hyper-V]
The full list of patches for the kdump issue has been sent in bug #1440103.
Can you build a 32bit kernel with the 5 patches to see if this resolves the
kdump on 32bit problem?
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Hi Chris,
Do you have a list of the patches you mention in comment #27? I'd like
to check the status upstream.
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Title:
The kernel swap between editions has been already tested in comment #19.
We'll wait for the full list of patches to get in upstream, then we can
revise from #19 onward.
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Thanks for the update, Chris.
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 and 15.04
Status in
Just to summarized the testing done so far:
- The 3.13{Trusty) kernel on a Vivid install and still exhibits the bug.
- The kexec-tools_2.0.6-0ubuntu2.1_i386(Which ships with Trusty) was installed
on an Vivid install and seems to resolve the bug, but we then hit bug 1440103
Can you one run
Are you only seeing an issue with the 32bit kernel or does 64bit also
exhibit the bug?
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Title:
[Hyper-V] Kernel panic not
This issue is also distinct to the one experience in bug 1440103
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Title:
[Hyper-V] Kernel panic not functional on 32bit
** Tags removed: kernel-key
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 and 15.04
Status in
** Tags added: kernel-key
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 and 15.04
Status in
** Tags removed: kernel-key
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 and 15.04
Status in
bug 1463584 may contain the fix for this. Are you only seeing an issue
with the 32 bit kernel?
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Title:
[Hyper-V] Kernel
Hi Joseph,
I don't think these 2 are related, the patches from bug 1463584 represent a new
feature support, so these 2 reports are not related
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** Tags added: kernel-key
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 and 15.04
Status in
** Tags removed: kernel-key
** Tags added: kernel-da-key
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10
** Changed in: kexec-tools (Ubuntu Utopic)
Importance: Undecided = High
** Changed in: kexec-tools (Ubuntu)
Importance: Undecided = High
** Changed in: kexec-tools (Ubuntu Vivid)
Importance: Undecided = High
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None of the 4.x builds are booting with 15.04 32bit.
Tested this with v4.0-vivid, v4.1-rc5-unstable and and rc2, all not able to
find/use sda.
Unfortunately I cannot reach any of the v3.13.xxx-trusty branches in the
kernel-ppa tree, all return a connection time-out.
** Tags added:
Thanks for all the testing. It seems the bug may be in the kexec-tools
package and not the kernel. Can you test the kexec-tools package that
comes with 14.04.1 on your vivid installation? It can be downloaded
from:
https://launchpad.net/ubuntu/+archive/primary/+files/kexec-
The unavailable links was temporary, and I was able to do this now:
Base OS VM:
DISTRIB_RELEASE=15.04
DISTRIB_CODENAME=vivid
Arch: i386
Successfully installed kernel v. 3.13.11-031311-generic #201404222035 -
trusty kernel on top of vivid.
The error remains:
root@ubuntu:~# sudo kdump-config
** Tags removed: kernel-da-key
** Tags added: kernel-key
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Title:
[Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10
We might have some progress here.
After installing kexec-tools_2.0.6-0ubuntu2.1_i386.deb kdump is now
loading and the initial reported problem that it was not even able to
see the crash memory location is not showing up.
The remaining problem is that the kernel panic is not completing, the VM
Thanks for the suggestions Joseph!
I'll give these a try and update the thread in the next few hours.
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Title:
[Hyper-V]
Another good test would be to see if the bug exists while booting the
3.13.0-24-generic or other Trusty kernel on a Utopic or Vivid install.
This will tell us if the bug is in the kernel or kexec-tools package.
You could also test a Vivid or Utopic kernel on a Trusty installation.
** Tags
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.1 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
** Summary changed:
- [Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10
+ [Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 and 15.04
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