> > If a serial port is used as a console, the port is used for both DMA
> > (normal use) and PIO (serial console output).  The latter can have a
> > negative impact on the former, aggravating existing bugs, or triggering
> > more races, even in the hardware.  So I think it's better to be more
> > cautious and keep DMA disabled for the console.
> 
> Thanks for the extensive and comprehensible replies.
> No more questions from my end.
> Looking forward to picking the patches from vanilla/stable trees.

If you could formally add such a tag:

Tested-by: <your email>

(maybe also Acked-by: or Reviewed-by:, dunno if you think it is
apropriate)

to the patches, this would be much appreciated and will usually speed up
the patches getting applied.

Thanks for your help!