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SubjectRe: Why is TCP checksum calc split between init & complete fns?

> OK, thanks. If anyone out there knows, I'd still like to find out
> why this is normally only done for TCP packets <= 68 bytes.

Because this length covers all pure ACK frames. Any number 60-68 would
be equally good. It was chenged to 76 recently to cover one cacheline though.

> Which function mods the head?

You looked into these functions, you know the answer.

> checks the rest of the packet. Why the split?

Because tcp_checsum_complete() is _not_ called for most of packets
during bulk transfer.

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