[DRBD-user] Bad Barrier Ack with 2.6.37

Holger Kiehl Holger.Kiehl at dwd.de
Mon Mar 28 12:09:17 CEST 2011


Hello,

first sorry for the delay, it was weekend :-)

On Fri, 25 Mar 2011, Lars Ellenberg wrote:

> On Fri, Mar 25, 2011 at 11:27:59AM +0000, Holger Kiehl wrote:
>> On Fri, 25 Mar 2011, Lars Ellenberg wrote:
>>
>>> On Fri, Mar 25, 2011 at 09:07:32AM +0000, Holger Kiehl wrote:
>>>> Hello,
>>>>
>>>> On Mon, 10 Jan 2011, Holger Kiehl wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> upgrading kernel on secondary from 2.6.36.2 to 2.6.37 gives me the
>>>>> following error on primary:
>>>
>>> Which means you are using the in-kernel DRBD module?
>>>
>> Yes.
>>
>>> Or the out-of-tree drbd source code,
>>> and just upgraded the kernel anyways?
>>>
>>> Does this occur in "mixed version" mode only, different drbd and/or
>>> kernel versions on both nodes, or with both nodes on the identical
>>> version(s)?
>>>
>> With 2.6.37 I had both nodes (primary + secondary) running this kernel
>> with in-kernel DRBD module and it gave me the error. With 2.6.38.1 I
>> just upgraded only secondary and the primary was running 2.6.36.4 and
>> it reported the bad barrierack.
>
> Could you try to use the out-of-tree 8.3.10?
> So we know whether we have to look for a genuine bug in DRBD,
> or a merge/cherry-pick mishap?
>
Yes, with out-of-tree 8.3.10 I no long get these errors. So there
must be something wrong with in-kernel code.

Regards,
Holger



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