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Date: Wed, 3 Oct 2001 09:58:30 -0700 (PDT)
From: James Simmons <jsimmons@transvirtual.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux console project <linuxconsole-dev@lists.sourceforge.net>
Subject: Re: Huge console switching lags
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> Well, there are indeed a few improvements to get with machine specific
> optimisations on unaccelerated framebuffer.
[snip]...

Neat trick. Please note also that no read operations to the framebuffer
are done by the fbcon layer. Such reads should be to the shadow buffers
(vc_screenbuffer) instead. Reading the framebuffer is a userland operation
and as such you really only tricks for reading in userland. 

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