Re: TCP Checksum offload in 2.4.19

From: David S. Miller (davem@redhat.com)
Date: Wed Sep 04 2002 - 18:16:33 EST


   From: Manish Lachwani <m_lachwani@yahoo.com>
   Date: Wed, 4 Sep 2002 07:34:57 -0700 (PDT)

   I am trying to implement the TCP checksum offload
   support using Intel e1000/3com 3c996b-t in Linux
   2.4.19. Does this version of the kernel support
   transmit h/w checksum offloading? Is there any patch I
   need to apply to the driver or kernel to get this
   feature to work?

It's already supported for e1000 cards.

Perhaps you are using only normal send/sendmsg/write
system calls to send data over sockets, in that case
TX checksum offload isn't used (there is no gain).

It starts getting used once you start using sendfile()
to transmit your data.
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