linux-kernel - Re: NAK nettiquete (was Re: "Re: [PATCH 0/2] Colored kernel output (run2)"

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Date:	Sun, 7 Oct 2007 17:29:39 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	Valdis.Kletnieks@...edu, Oleg Verych <olecom@...wer.upol.cz>,
	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	Medve Emilian-EMMEDVE1 <Emilian.Medve@...escale.com>,
	Helge Deller <deller@....de>
Subject: Re: NAK nettiquete (was Re: "Re: [PATCH 0/2] Colored kernel output
 (run2)"

On Oct 7 2007 16:12, Alan Cox wrote:
>
>- We run on a lot more than VGA PC consoles
>- We have serial consoles (which may or may not be VT132/ANSI compliant)

Yes, and the serial driver does not usually pass on vc->vc_color to the real
hardware. If it did, it would have to transform it back into an unportable
ANSI code and send that. So we don't do that.

>- The printk paths are run at IRQ time ASAP to get messages to console,
>that could mean we split existing colour escape code processing and the
>like.

Oleg already persuaded me to add options to toally configure it out,
so there is no impact for you.

>- People redirect the console feed other places via ioctl. Some of them
>parse "<%d>" as the start

Interestingly enough, the <n> part is not transferred over serial,
but that seems another story.

>- If you want to do "pretty" boot up you do it in X or frame buffer
>(which is going to get easier and easier with the X shift to kernel side
>video support)

fb is slow. Feels like a 9600bps serial line.

Let everyone have his own fun.
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