[openib-general] enable GSO over IPoIB

[Michael S. Tsirkin]

Quoting r. Shirley Ma <xma at us.ibm.com>:
> Subject: Re: enable GSO over IPoIB
> 
> >     Shirley> Since linux 2.6.18 supports GSO, I have patched IPoIB to
> >     Shirley> enable GSO, but haven't tested the performance yet. Has
> >     Shirley> anyone tried already?
> >
> > No, I don't think anyone looked at that yet.  Could you post your
> > patch?  What is required?  Supporting gather/scatter?
> >
> >  - R.
> 
> Don't need too. GSO only improves sender side performance. It allows large packet send in ULPs, and segments this packet in interface layer before driver xmit. The GSO enablement is through ethtool. Since ipoib doesn't support ethtool, i just simply added a module parameter to set the interface GSO flag when loading the module.

Any idea what does ethtool do that IPoIB can't support?

-- 
MST