linux-kernel - RE: vmcore not getting created on linux-4.7

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Date:	Fri, 24 Jun 2016 11:37:21 -0500
From:	"Steve Wise" <swise@...ngridcomputing.com>
To:	"'nborisov'" <n.borisov.lkml@...il.com>,
	<linux-kernel@...r.kernel.org>
Subject: RE: vmcore not getting created on linux-4.7

> >
> > Regarding the vmcore-dmesg failed, it's likely you are hitting this
> issue:
> >
> > http://lists.infradead.org/pipermail/kexec/2012-July/006602.html
> >
> > Can you try to download an compile the latest kexec tools from
> > git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git
> >
> 
> I did build/install kexec-tools-2.0.12.
>

I think even though I installed kexec-tools-2.0.12, my system wasn't using the
correct kexec.  I fixed that and installed kexec-tools from the git repo and now
I get a dmesg.txt, but still no vmcore dump:

...
/dev/sda2: clean, 1262767/6291456 files, 19581451/25165824 blocks
EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts:
Free memory/Total memory (free %): 187160 / 238580 ( 78.4475 )
Loading SELINUX policy
SELinux:  Disabled at runtime.
audit: type=1404 audit(1466759899.842:2): selinux=0 auid=4294967295
ses=4294967295
Policy load failed, a relabel will be required on reboot
Saving vmcore-dmesg.txt
Saved vmcore-dmesg.txt
umount: can't umount /mnt/selinux: Invalid argument
sd 6:0:0:0: [sdb] Synchronizing SCSI cache
sd 4:0:0:0: [sda] Synchronizing SCSI cache
reboot: Restarting system
reboot: machine restart
...

I've tried 3 different machines and they all fail to generate the vmcore.
Attached is the full console output.   Also attached is the kernel .config file.

Does anyone have any ideas?

Thanks,

Steve.

View attachment "kdump-kernel.txt" of type "text/plain" (55246 bytes)

View attachment "config.txt" of type "text/plain" (142034 bytes)