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Message-ID: <3AA5F983.D963D199@alsa-project.org>
Date: Wed, 07 Mar 2001 10:04:03 +0100
From: Abramo Bagnara <abramo@alsa-project.org>
Organization: Opera Unica
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To: Alexander Viro <viro@math.psu.edu>
CC: Jeremy Elson <jelson@circlemud.org>,
        Marcelo Tosatti <marcelo@conectiva.com.br>,
        linux-kernel@vger.kernel.org
Subject: Re: Mapping a piece of one process' addrspace to another?
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Alexander Viro wrote:
> 
> On Wed, 7 Mar 2001, Jeremy Elson wrote:
> 
> > Right now, my code looks something like this: (it might make more
> > sense if you know that I've written a framework for writing user-space
> > device drivers... I'm going to be releasing it soon, hopefully after I
> > resolve this performance problem.  Or maybe before, if it's hard.)
> 
> Ugh. Why not make that a named pipe and use zerocopy stuff for pipes?
> I.e. why bother with making it look like a character device rather than
> a FIFO?

What about ioctl? Device drivers sometimes need it ;-)


-- 
Abramo Bagnara                       mailto:abramo@alsa-project.org

Opera Unica                          Phone: +39.546.656023
Via Emilia Interna, 140
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ALSA project is            http://www.alsa-project.org
sponsored by SuSE Linux    http://www.suse.com

It sounds good!
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