[ofa-general] Re: [PATCH] IPOIB: use LRO

[Rick Jones]

Roland Dreier wrote:
>  > Not that it shouldn't be enabled, but is there much bang for the buck
>  > from LRO for a large MTU interface?
> 
> I think there's not much point to LRO except when not using connected
> mode.  Especially since checksum offload doesn't work for connected mode.

IIRC "the linux stack" does have integrated copy and checksum on 
receive, at least in some cases.  I suppose that if LRO would coalesce 
several sub-MSS segments it might still provide value but I wasn't sure 
if it would and if so how much that buys one.  My IPoIB setup is getting 
long-in-the-tooth and isn't even up at the moment :(

rick jones