11.1 running on HyperV hn interface hangs

[Julian Elischer]

On 6/9/17 7:02 pm, Pete French wrote:
>> We recently moved our software from 11.0-p9 to 11.1-p1, but looks 
>> like there
>> is a regression in 11.1-p1 running on HyperV (Windows/HyperV 2012 
>> R2) where
>> the virtual hn0 interface hangs with the following kernel messages:
>>
>>   hn0: <Hyper-V Network Interface> on vmbus0
>>   hn0: Ethernet address: 00:15:5d:31:21:0f
>>   hn0: link state changed to UP
>>   ...
>>   hn0: RXBUF ack retry
>>   hn0: RXBUF ack failed
>>   last message repeated 571 times
>>
>> It requires a restart of the HyperV VM.
>>
>> This is a customer production server (remote customer ~4000km away) 
>> running
>> fairly critical monitoring software, so we needed to roll it back 
>> to 11.0-p9.
>> We only have two customers running our software in HyperV, vs lots 
>> in VMware
>> and a handful on physical hardware.
>>
>> 11.0-p9 has been very stable.  Has anyone seen this problem before 
>> with 11.1 ?
>
>
> I don't run anything on local hyper-v anymore, but I do run a ot of 
> stuff in Azure, and we havent seen anything like this. I track 
> STABLE for things though, updating after reading the commits and 
> testing locally for a week or so, so the version I am running 
> currently is r320175, which was part of 11.1-BETA2. I am going to 
> upgrade to a more recent STABLE sometime this weke or next though, 
> will do that on a test amchine and let you now how it goes.
>
> I seem to recall that there were some large changes to the hn code 
> in August to add virtual function support. When does 11.1-p1 date 
> from ?
make sure you contact the FreeBSD/Microsoft guys.  Very responsive.. 
don't know if they watch -stable..
I'll cc a couple..

>
> -pete.
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