Re: zero-copy networking & a performance drop

[Nivedita Singhvi]

> Now, here is my direct question: has a zero-copy TCP stack 
> been introduced after 2.4.3 (which we're running)? I believe 
> the answer is yes, but I've not been able to find direct confirmation. 
> If the answer is yes, does anything special need to be done 
> (in terms of allocating/working with skbs, or passing the packets 
> up to higher levels) in order to use the zero-copy implementation.

Yes, 2.4.4.  You should upgrade to that if possible, or rather,
a much more recent version..

That said, rx has been slower than sends in most of our testing
too. 

thanks,
Nivedita