From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Danny ter Haar <dth@ncc1701.cistron.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Linux serial console patch
Date: Mon, 6 Sep 2004 11:43:21 +0100 [thread overview]
Message-ID: <20040906114321.A26906@flint.arm.linux.org.uk> (raw)
In-Reply-To: <chhebr$pta$1@news.cistron.nl>; from dth@ncc1701.cistron.net on Mon, Sep 06, 2004 at 10:32:27AM +0000
On Mon, Sep 06, 2004 at 10:32:27AM +0000, Danny ter Haar wrote:
> James Courtier-Dutton <James@superbug.demon.co.uk> 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
next prev parent reply other threads:[~2004-09-06 10:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-05 17:24 Linux serial console patch Alex Owen
2004-09-05 23:38 ` James Courtier-Dutton
2004-09-06 10:32 ` Danny ter Haar
2004-09-06 10:43 ` Russell King [this message]
2004-09-06 15:45 ` James Courtier-Dutton
2004-09-06 15:52 ` Russell King
2004-09-06 16:46 ` Randy.Dunlap
2004-09-11 20:58 ` Herbert Poetzl
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