From: Abramo Bagnara <abramo@alsa-project.org>
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?
Date: Wed, 07 Mar 2001 10:04:03 +0100 [thread overview]
Message-ID: <3AA5F983.D963D199@alsa-project.org> (raw)
In-Reply-To: <Pine.GSO.4.21.0103070337560.2127-100000@weyl.math.psu.edu>
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
48014 Castel Bolognese (RA) - Italy
ALSA project is http://www.alsa-project.org
sponsored by SuSE Linux http://www.suse.com
It sounds good!
next prev parent reply other threads:[~2001-03-07 9:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-07 5:19 Mapping a piece of one process' addrspace to another? Jeremy Elson
2001-03-07 5:55 ` Alexander Viro
2001-03-07 6:02 ` Marcelo Tosatti
2001-03-07 8:13 ` Jeremy Elson
2001-03-07 8:40 ` Alexander Viro
2001-03-07 8:54 ` Jeremy Elson
2001-03-07 9:09 ` Alexander Viro
2001-03-07 23:22 ` James H. Cloos Jr.
2001-03-07 9:04 ` Abramo Bagnara [this message]
2001-03-07 9:10 ` Alexander Viro
2001-03-07 9:20 ` Abramo Bagnara
2001-03-07 9:49 ` Alexander Viro
2001-03-07 13:01 ` Abramo Bagnara
2001-03-07 21:02 ` Jeremy Elson
2001-03-07 8:58 ` Abramo Bagnara
2001-03-07 18:17 ` Pavel Machek
-- strict thread matches above, loose matches on Subject: below --
2001-03-07 10:51 Manfred Spraul
2001-03-07 13:57 Jesse Pollard
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