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From: "Miquel van Smoorenburg" <miquels@cistron.nl>
Subject: Re: serial console (was Re: [patch] printk from userspace)
Date: Thu, 15 Aug 2002 12:43:23 +0000 (UTC)
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In article <87eld1s9l7.fsf_-_@arm.t19.ds.pwr.wroc.pl>,
Arkadiusz Miskiewicz  <misiek@pld.ORG.PL> wrote:
>btw. is there any reason to not display initscripts messages
>on all consoles in such setup:
>append="console=tty0 console=ttyS0,57600n8"
>serial=0,57600n8
>?

Yes. It is not implemented in the kernel and it would not
be trivial to do so (or even wanted)

>kernel messages are available on both - tty0 and ttyS0 while
>userspace messages (from initscripts) only on last specified
>- in such case ttyS0. 

That's because printk() in the kernel uses a very different codepath than
the userland write(console, "hello")

Mike.

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