On 25/09/2007, David Edmondson <dme at sun.com> wrote: > > Why? I can accept a large packet in a MAC layer transmit function, > chop it up and then present an mblk chain to the driver in a single > call to its' transmit routine. >
You lose the single DMA map this way, which is a good portion of the advantage of LSO (given how slow the DMA map operation appears to be on many platforms). Paul -- Paul Durrant http://www.linkedin.com/in/pdurrant
