zero-copy receive?

<[email protected]>
Newsgroups gmane.network.tux
Message-ID <[email protected]> 
Hi,
    I am hacking tux's code. I saw read_request is
called to receive http requests. This fuction call
tcp_recvmsg to copy data from sk_buffer to tux's own
buffer (req->headers). Is is possible to eliminate this
copy? I heard Linux already support zero-copy socket,
is it true? How to use it?

Thanks!

Donghui
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