[ofa-general] Re: [PATCH 6/11] IB/ipoib: add checksum offload support

[Michael S. Tsirkin]

> I am not with you. Does the connectX actually computes and inserts 
> tcp/udp checksum on outgoing packets?

ConnectX can only compute checksum for TCP and UDP protocols
for datagram packets. That's what Eli's patches enable.

OTOH, my patch also makes it possible to save on checksumming
for this case, but additionally, for all of
- IPoIB connected mode
- HCAs besides ConnectX
- protocols besides TCP/UDP

Unfortunately, this approach
- only speeds up communication if patch has been applied
  at both communicating nodes
- only speeds up communication within IPoIB subnet
In all other cases my patch provides no speedup

So the 2 patches are complementary.

-- 
MST