i've received this message a few times /netbsd: ex0: uplistptr was 0 ex0 is a 3c905C-TX with h/w tx-checksumming enabled. this appears to mean that the rx "mailbox" was full and that the chip dma stalled. the rx ring size is set to 128 (EX_NUPD), tx is 256. curious why these are skewed? warnings if i were to double EX_NUPD?