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    SubjectRe: Gigabit Linux Server Bottlenecks
    > Yes, this works fine for UDP, but you can't do TCP this way without COW VM 
    > support for scatter skbufs, because TCP needs to buffer data until it has been
    > acknowledged. Even then, you need the application to behave properly and not
    > touch anything in the same page as the output data until an ACK is received.
    > This is easy enough to hack into high bandwidth servers, like ftp or rcp, and
    > that is mostly the only place you will need it.

    There is one other case its really easy to support - sendfile().

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