> On Mon, Feb 05, 2001 at 10:07:18AM -0800, Jun Sun wrote: > > > Did you set rx_copybreak to 1518? I sent patches long time ago to the driver > > authors for MIPS, but I am not sure they are not there. > > Copybreak is just an optimization. So even with this unused or set to a > wrong value the driver should work. If you set it wrongly you can get network failures/stalls. The normal cases are not a problem however. You need to copybreak small frames to avoid filling the socket queue with empty spaces. Some platforms set it to 1518 to force a copy thereby aligning the IP header on a 4 byte boundary, which most PCI bus master drivers wont do if you are not copying
