Re: Infiniband - dog slow on newer kernels

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On Mon, May 09, 2016 at 06:45:27PM +0800, Ian Chapman wrote:
> Is anybody here use Infiniband on Fedora? More specifically IPoIB. I
> have two machines directly connected via IB, one running F23 and the
> other running F22. The IB card I have in both machines is a dual
> port
> Mellanox Technologies MT25418. Normally I can push about 9.8Gbit/sec
> between the two machines, however if I use a kernel newer than about
> v4.0.4 on the F22 machine or a kernel newer than about v4.2.3 on the
> F23 machine, the maximum transfer rate drops to 760K/sec.
> 
> Is this a kernel bug, or has something significantly changed?

Let's treat it as a bug -- can you file one, please?


-- 
Matthew Miller
<mattdm@xxxxxxxxxxxxxxxxx>
Fedora Project Leader
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