Il 22/11/2012 10:45, Michael S. Tsirkin ha scritto: > All this looks suspiciously like premature optimization to me. > Do we have data to show avoiding header copy is a win?
The code is a little simpler, because we know the footer is 1 byte only. Paolo > The caller would have to handle the case where the header is not > contigious, which seems just too complex - in practice the code > seems to simply fail in this case. > > Why not just copy the header using iov_from_buf()/iov_to_buf() > and be done with it?
