Re: zero-copy TCP

From: Werner Almesberger (almesber@lrc.epfl.ch)
Date: Sun Sep 03 2000 - 12:55:44 EST

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Ingo Molnar wrote:
> i believe such zero-copy send should only be allowed for drivers which can
> guarantee correct checksums.

Hmm, I think this shouldn't be tied too closely to TCP. E.g. you can
probably play wonderful ALF tricks with raw sockets.

For TCP/UDP, such a restriction may be useful, but then it shouldn't
be visible to the application, or route changes on multi-homed systems
with different hardware on those ports would be great fun.

- Werner

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