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    SubjectRe: zero-copy TCP fileserving
    > But in the case of a heavy filetransfer, the data will need to hit main
    > memory, especially if the NIC can bus-master DMA from main memory. The

    > DMA in, DMA out. Checksum can be handled by the NIC. Now I'm not mad
    > enough to claim that direct device<->device I/O is the way to go (which
    > was discussed here recently :).

    If the hardware can do checksum on outgoing for you, you are absolutely
    correct. But not many do.


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