Re: iwlwifi and tx info in skb->cb

[Johannes Berg <johannes@sipsolutions.net>]

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> >  That's not really related to wireless at all, if you want to do
> >  zero-copy IO then you need to checksum when the stuff hits the wire
> >  which means out of hardware buffers, which some hardware (including
> >  802.11) doesn't support so you need to copy, nothing wireless specific
> >  here :)
> >
> 
> The FCS/CRS checksum of the wireless packet is performed in the HW but
> why should I care about IP layer?

Because the data you're sending is sent via TCP?

> >  Anyway, with the changes davem and I are making to actually save the
> >  *extra* copy we should be doing well. That's where you want to look for
> >  improvements.
> 
> This is just for the bridging case, isn't it?

No, this is for TCP and everything else too.

If you don't believe me, read the thread, I don't want to re-iterate it
all.

johannes

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