Kernel hangs on reboot on system with 05/2013~06/2013 CURRENT sources

Florian Smeets flo at
Thu Jun 27 08:43:54 UTC 2013

On 26.06.13 03:19, Attilio Rao wrote:
> On Tue, Jun 25, 2013 at 11:27 PM, Florian Smeets <flo at> wrote:
>> On 06/25/2013 22:45, Garrett Cooper wrote:
>>>     Long story short is that I've run into an issue on several VM
>>> images and real machines where UFS on mpt fails to reboot because it
>>> hangs in the kernel. I don't have any specific details, other than it
>>> occurs regularly with cam/mpt on VMware boxes running builds; however
>>> I've also seen this occur with a Dell box that has an mpt SAS
>>> controller with 2 zpools and gobs of RAM. Does anyone know of any
>>> issues in this area [recently]?
>>>     This set of issues appears to have started cropping up after
>>> 03/2013, because I was running reliable builds off those sources.
>>> Thanks!
>>> -Garrett
>> Yes, I saw the same thing today when rebooting a box running r251905:
>> Tue Jun 18 10:12:42 CEST 2013 with ahci on a zfs only system.
>> I update this box about once a week, that previous kernel was from Jun
>> 11. and that still rebooted successfully. As the kernel from June 18. is
>> now kernel.old I don't know the SVN rev for the June 11 kernel, but it
>> looks like it was broken between June 11. and 18.
> Can you break into KDB once the loop happens?

I cannot reproduce on kernels from yesterday/today. So for me the case
is closed.


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