Messages in this thread | | | Date | Mon, 25 Feb 2002 11:22:37 -0500 (EST) | From | Ion Badulescu <> | Subject | RE: Need some help with IP/TCP Checksum Offload |
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On Fri, 22 Feb 2002 harish.vasudeva@amd.com wrote:
> i tried setting the NETIF_F_SG flag, but the stack still gives the right checksum.
Correct, not all packets will use the zerocopy framework. Using sendfile is one way of generating them; I believe NFS will also do zerocopy but I haven't checked it.
> Now, i have this 1 more question. If @ all the stack does offload chksum > to the hardware, how will the driver come to know about this? Is there a > per packet indication from the stack asking the driver > TO-DO/OR-NOT-TO-DO chksum offloading?
Yes: skb->ip_summed == CHECKSUM_HW says the hardware is expected to generate the checksum.
Ion
-- It is better to keep your mouth shut and be thought a fool, than to open it and remove all doubt.
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