Questions about Infiniband on FreeBSD

[Jason Bacon]

On 2019-10-08 00:12, Mikhail T. wrote:
> On 03.10.19 03:18, Hans Petter Selasky wrote:
>> On 2019-10-03 02:49, Jason Bacon wrote:
>>> I saw frequent hangs (self-resolving) with an MTU of 65520.  Cutting 
>>> it in half improved reliability by orders of magnitude, but still 
>>> occasional issues.  Halving it again to 16380 seemed to be the sweet 
>>> spot.
>>
>> Try this fix:
>>
>> https://svnweb.freebsd.org/changeset/base/352955 
>
> Well, I waited for these to hit the 11-stable and rebuilt both 
> kernels. Unfortunately, I cannot tell they help very much. With MTU of 
> 65K I still see hangups in NFS and other data-transfers.
>
> Setting MTU to 16K seems Ok. Yours,
>
>     -mi
>
Bummer.  Thanks for following up,

     JB

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