zero-copy TCP

From: Ingo Molnar (mingo@elte.hu)
Date: Sat Sep 02 2000 - 04:45:41 EDT

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    On Sat, 2 Sep 2000, Dan Maas wrote:

    > There are various other tricks that can be done to speed up network
    > servers, like passing files directly from the buffer cache to the
    > network card. This one is currently frowned upon by the Linux
    > community, [...]

    FYI, the TUX patch (released yesterday) includes a lightweight zero-copy
    TCP implementation for the 2.4 Linux kernel. The interface is not yet
    exported to user-space (simply because TUX uses it from kernel-space so
    the user-space bits were not needed), but the network driver framework and
    TCP-stack bits are there, so the hard part is done. The two most widely
    used gigabit drivers are 'converted' to support zero-copy, the SysKonnect
    and the Acenic driver (the modifications are well tested). I plan to add
    the user-space bits in the near future.

            Ingo

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