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Date: Tue, 2 Oct 2001 15:33:15 +0100
From: Tim Waugh <twaugh@redhat.com>
To: linux-kernel@vger.kernel.org
Subject: Re: printk while interrupts are disabled
Message-ID: <20011002153315.G10442@redhat.com>
In-Reply-To: <3BB9A6F4.6BDDAA81@berlin.de> <20011002102210.B1630@mueller.datastacks.com>
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In-Reply-To: <20011002102210.B1630@mueller.datastacks.com>; from crutcher@datastacks.com on Tue, Oct 02, 2001 at 10:22:10AM -0400
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On Tue, Oct 02, 2001 at 10:22:10AM -0400, Crutcher Dunnavant wrote:

> They get stuffed into a buffer to be printed later. It is possible to
> overflow that buffer, and lose some of your printk messages.

Incidentally, something I noticed today: when using a parallel printer
console, 'Alt-SysRq-T' gave me a complete task list followed by the
entire kernel ring buffer.

I've taken a look at the code in lp.c, sysrq.c, and printk.c, and I
don't see what can be causing it.  Anyone have ideas?

This happened when the machine had locked up for some reason.

Tim.
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