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Date: Sun, 11 Feb 2001 22:29:38 +0000
From: Andrew Morton <andrewm@uow.edu.au>
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
CC: Pavel Machek <pavel@suse.cz>,
        Tom Eastep <teastep@seattlefirewall.dyndns.org>,
        "Michael B. Trausch" <fd0man@crosswinds.net>,
        Josh Myer <jbm@joshisanerd.com>, linux-kernel@vger.kernel.org
Subject: Re: [OT] Major Clock Drift
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Alan Cox wrote:
> 
> > Hmm, I can make it loose 30 seconds in 12 seconds. Just cat
> > /etc/termcap. Vesafb does this kind of stuff. [Yes, 3 times slower
> > clock].
> 
> Why are interrupts being disabled for vesafb scrolling anyway ?

Console writes happen under spin_lock_irq(console_lock).

The only reason for this which I can see: the kernel
can call printk() from interrupt context.
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