Re: TCP Checksum offload in 2.4.19

From: David S. Miller (
Date: Thu Sep 05 2002 - 22:16:34 EST

   From: Manish Lachwani <>
   Date: Thu, 5 Sep 2002 09:18:31 -0700 (PDT)

   Instead of making changes to my application to use
   sendfile(..), is it possible for me to enable zerocopy
   in 2.4.19 kernel (using a patch or something) so that
   tx checksum can be offloaded to the h/w for every TCP

There is no benefit, as we have to copy the data from
userspace into a kernel buffer anyways. The checksum
can be computed for free in parallel with the copy.
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