Re: Linux serial console patch

[James Courtier-Dutton <James@superbug.demon.co.uk>]

Alex Owen wrote:
> Glen Turner,
> 
> I have read your posts to lkml containing your serial console flow control
> patches firstly for 2.4.x and then for 2.6.x kernels.
> 
> Rationale:
>  "[PATCH] 0/3 Fix serial console flow control"
>     http://www.ussg.iu.edu/hypermail/linux/kernel/0210.1/1790.html
> 2.4 patches:
>  "[PATCH] 1/3 Fix serial console flow control, serial.c"
>     http://www.ussg.iu.edu/hypermail/linux/kernel/0210.1/1791.html
>  "[PATCH] 2/3 Fix serial console flow control, serialP.h"
>     http://www.ussg.iu.edu/hypermail/linux/kernel/0210.1/1792.html
>  "[PATCH] 3/3 Fix serial console flow control, serial-console.txt"
>     http://www.ussg.iu.edu/hypermail/linux/kernel/0210.1/1793.html
> 2.6 patch:
>  "[PATCH] Fix CTS/RTS flow control in serial console"
>     http://www.ussg.iu.edu/hypermail/linux/kernel/0310.2/1080.html
> 
> I have not been able to find any feedback on those patches in the lkml
> archives. Also I can find no evidence that the patch made it into the
> 2.6.8.1 kernel. This is a shame as I found your rationale very
> persuasive.
> 
> Do you maintain an up-to-date version of this patch?
> Did you get any feedback for this patch, positive or negative?
> Do you need people (i.e. me) to test this patch?
> 
> Thanks
> Alex Owen
> -

Does this fix junk being output from the serial console?
If one is using Pentium 4 HT, it seems that both CPU cores try to send 
characters to the serial port at the same time, resulting in lost 
characters as one CPU over writes the output from the other.