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SubjectRe: [PATCH] serial: remove "too much work for irq" printk
Alan Cox wrote:
>> This is going to put trouble in other places unless, at least, it can be
>> turned off. The UART serial interface is heavily emulated as a console
>> interface without an actual serial port behind it, both in hardware and
>> software. Rates will typically vastly exceed real serial port rates,
>
> Yes Dell do it, HP do it, IBM do it. Have done for years, never caused us
> a problem. Its only KVM tripping it.
>
> As to bit rate we support up to about 1 to 1.5 Mbit.
>

FWIW, the highest rate I've seen in hardware is a FIFO about 4K deep
that can be polled at about 25 MHz when all the overhead is accounted for.

-hpa


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