[CentOS] Kernel panic after update to 6.4

Wed Mar 13 22:43:18 UTC 2013
Johnny Hughes <johnny at centos.org>

On 03/13/2013 05:17 PM, Johnny Hughes wrote:
> On 03/13/2013 04:19 PM, Liam O'Toole wrote:
>> On 2013-03-13, Emmett Culley <emmett at webengineer.com> wrote:
>>
>> (...)
>>
>>> So let's start again.
>>>
>>> Kernel panic - Not syncing: Attempted to kill init!
>>> Pid: 1, comm: init not tainted: 2.6.32-358.0.1.el6.x86_64 #1
>>>
>>> After yum upgrade --enablerepo=epel on two of five machines, one of which is the host for the three VM's that succeeded and the one that failed, just as the host.
>>>
>>> I have a screen shot of that VM's boot failure, but I don't know the proper way to include it in a post.
>>>
>>> I've uninstalled that kernel and ran yum upgrade again, it still fails on that kernel, on both the host and the VM.  I suppose the good thing is that it happened on a VM guest that is not critical, so I don't have to experiment with the host that has four important guests running on it.
>>>
>>> Any ideas?
>>>
>>> Emmett
>> I saw this problem on one machine I upgraded from 6.3 to 6.4 recently.
>> When I boot it in verbose mode I see the following messages:
>>
>> 	dracut: /proc/misc: No entry for device-mapper found
>> 	dracut: Failure to communicate with kernel device-mapper driver
>>
>> which led me to the following bug report:
>>
>> 	http://bugs.centos.org/view.php?id=6304
>>
>> Just today kernel 2.6.32-358.2.1 became available. The problem is still
>> present, but only on the same one machine.
>>
> This file exists in the kernel:
> /lib/modules/2.6.32-358.2.1.el6.x86_64/kernel/drivers/md/dm-mod.ko
>
> Somehow it seems that in some machines it is not making it into the initrd.

Try this command where the kernel is installed and not booting (when
booted into a kernel that works):

lsinitrd /boot/initramfs-2.6.32-358.2.1.el6.x86_64.img | grep dm-mod

(if you have one of the other 358 kernels installed, use that version
instead of2.6.32-358.2.1.el6.x86_64  )

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