Questions about Infiniband on FreeBSD

[Mikhail T.]

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