Is there any way, short of re-compiling tcp, to set SO_WROFF to zero
(and thereby put the headers in a different mblk for TCP transmits)
via some kind of ndd tunable or mdb procedure?

I *think* the offset left at the front of mblks may be causing
a performance problem in my gldv3 driver, and a way to zero
out this offset (so mp->b_rptr in payload segments is right at
the front of dblk) would help me see if this is true.

Thanks,

Drew
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