From: Andi Kleen <ak@suse.de>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Dave Hansen <haveblue@us.ibm.com>,
linux-kernel@vger.kernel.org, Andi Kleen <ak@suse.de>
Subject: Re: [PATCH] early printk for x86
Date: Mon, 18 Nov 2002 16:17:50 +0100 [thread overview]
Message-ID: <20021118161750.A32042@wotan.suse.de> (raw)
In-Reply-To: <14814.1037632523@passion.cambridge.redhat.com>
On Mon, Nov 18, 2002 at 03:15:23PM +0000, David Woodhouse wrote:
>
> haveblue@us.ibm.com said:
> > 1. I copied the x86_64 early printk support for plain x86. Is
> > anyone opposed to me sending this on to Linus?
>
> Why is it necessary to reimplement serial console for each arch rather than
> just registering the generic serial console as early as possible from
> arch-specific code?
>
> There's no _reason_ to wait for console_init(), for most consoles.
The generic serial driver needs lots of infrastructure that is not present
in early boot. Also the early_printk serial driver is polled, not
interrupt driven. The whole point of early_printk is that you can debug
from line one of your code, so it is essential that it is self contained
as far as possible.
-Andi
next prev parent reply other threads:[~2002-11-18 15:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-14 19:42 [PATCH] early printk for x86 Dave Hansen
2002-11-14 19:55 ` Andi Kleen
2002-11-14 20:27 ` Jeff Garzik
2002-11-14 22:50 ` Dave Hansen
2002-11-15 3:43 ` Andi Kleen
2002-11-15 3:52 ` William Lee Irwin III
2002-11-15 4:15 ` H. Peter Anvin
2002-11-14 21:05 ` Jeff Garzik
2002-11-14 23:17 ` Jeff Garzik
2002-11-18 15:15 ` David Woodhouse
2002-11-18 15:17 ` Andi Kleen [this message]
2002-11-18 15:39 ` David Woodhouse
[not found] <3DD3FCB3.40506@us.ibm.com.suse.lists.linux.kernel>
[not found] ` <3DD40719.5030108@pobox.com.suse.lists.linux.kernel>
[not found] ` <3DD428C3.4030700@us.ibm.com.suse.lists.linux.kernel>
[not found] ` <20021115044300.C20764@wotan.suse.de.suse.lists.linux.kernel>
[not found] ` <ar1sdm$gfe$1@cesium.transmeta.com.suse.lists.linux.kernel>
2002-11-15 4:31 ` Andi Kleen
2002-11-15 4:33 ` H. Peter Anvin
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