Re: iwlwifi and tx info in skb->cb

["Tomas Winkler" <tomasw@gmail.com>]

>  Ah, no, I misread that. Well, I think it might still help to say you
>  need N bytes headroom and use those since you wouldn't have to allocate
>  an extra skb.

There actually might be a benefit in doing this but it is quite a
change in design which means not now.

>
>  > >  You should implement TCP checksumming in the hardware. *that* would help
>  > >  a lot.
>  >
>  > There is already pretty much deal of link layer in software to reduce
>  > the cost and the complexity of the HW for these softmac NICs so
>  > this would be kind of strange investment...but I didn't invest much
>  > thoughts into yet.
>  > There are probably other means to utilize scatter gather DMA then TCP
>  > off loading. Are they any other source of scattered packets maybe
>  > iovec?
>
>  Well as far as I know those too would be zero-copy IO which only works
>  if you have TCP checksumming in hardware.

I've just scanned the thread that was explaining why is this necessary
I will read it more carefully... I have just feeling that all this
wlan stuff just fits very awkwardly into current networking stack.

Tomas