>  I completely agree with Phil.  Even with an OS like NetBSD
>(multi-user) I cannot believe that a little serial communication is too
>much for the machine.  I fail to see why NetBSD has this problem with
>serial communication when other OSes do not appear to.  I never remember
>Linux complaining about SILO anything.

Just surround the warning printf with #if 0 ... #endif, and the behaviour
will be compatible.    :-)

BSDI had this problem as well, and they fixed it by removing the printf,
adding a counter to the softc, and reporting the lossage on device close.
One problem of printfing it when it happens is that it aggravates the
problem: kernel printf runs at elevated spl, so for a considerable number
of microseconds no interrups are processed.

I must admit not having looked at the current com driver for ages, so I
dunno if this is a relevant remark at present.

                                                -- Bert Driehuis

------
Bert Driehuis                 God, grant me the serenity to accept the things
driehuis@playbeing.org        I can't change, courage to change the things I
                              can, and the wisdom to know the difference.