[brussels-dev] Re: [driver-discuss] Re: [networking-discuss] Brussels high-level design document

[Raymond LI - Sun Microsystems - Beijing China]

Garrett D'Amore wrote:
>>
>> "link_cksum_offload" controls tx/rx checksum enabling as well. 
>> Framework seems not having this as tunable so far.
>
> Its because it doesn't need to be tunable.  The framework negotiates 
> this feature with the drivers... it always enables the feature if the 
> driver can support it.  There is never any reason to disable it.
>
I had met questions from customer who complained his/her application 
failed because all 0x0000 in TCP/IP's checksum field. If we provide 
customer with better grained tuning over checksum capability, he/she 
might be able to shoot or debug problems more efficiently. And we could 
see most morden day drivers in Windows/Linux have tx/rx checksum tunable 
respectively. I believe at least for debug/workaround reasons, we should 
have this as an option to customer.