Messages in this thread | | | Date | Sun, 3 Sep 2000 10:34:43 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: zero-copy TCP |
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On Sat, 2 Sep 2000, Jeff V. Merkey wrote:
> **ALL** Netware network drivers support a scatter/gather proramming > interface, whether the hardware does or not. In NetWare, the drivers > get passed a fragment list in what's called an ECB (Event Control > Block). It's the drivers responsiblity to assemble the fragment lists. > We did it this way to support scatter/gather cards and non-scatter > gather cards in one interface. Those drivers that do not support > scatter gather DMA operations copy to a local buffer to assemble the > packet. [...]
this is exactly what TUX implements and what i mentioned in my first email that started this thread. Was a complete overhaul of the TCP/IP stack needed like you claim? Not at all - the Linux TCP/IP code was so generic, that to my surprise i saw the first zero-copy TCP transfer after only one day of hacking.
Ingo
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