Re: Linux serial console patch

[Russell King]

On Mon, Sep 06, 2004 at 10:32:27AM +0000, Danny ter Haar wrote:
> James Courtier-Dutton  <James@xxxxxxxxxxxxxxxxxxxx> wrote:
> >> 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.
> >
> >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.
> 
> We have multiple P4-HT enabled servers with debian installed & serial
> console enabled (RPB++ ;-) and _i_ have never seen this behaviour.

I don't think this is a serial problem as such, but a problem with the
kernel console subsystem (printk) itself.  Maybe James can provide an
example output to confirm exactly what he's seeing.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core
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