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Date: Fri, 9 Mar 2007 17:50:29 -0500
From: "Lee Revell" <rlrevell@joe-job.com>
To: "Jan Engelhardt" <jengelh@linux01.gwdg.de>
Subject: Re: ABI coupling to hypervisors via CONFIG_PARAVIRT
Cc: "Ingo Molnar" <mingo@elte.hu>,
       "Linus Torvalds" <torvalds@linux-foundation.org>,
       "Jeremy Fitzhardinge" <jeremy@goop.org>,
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       "Thomas Gleixner" <tglx@linutronix.de>,
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       LKML <linux-kernel@vger.kernel.org>,
       "Rusty Russell" <rusty@rustcorp.com.au>, "Andi Kleen" <ak@suse.de>,
       "Chris Wright" <chrisw@sous-sol.org>,
       "Alan Cox" <alan@lxorguk.ukuu.org.uk>
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On 3/9/07, Jan Engelhardt <jengelh@linux01.gwdg.de> wrote:
> I think the sound example to the right really shows it. /dev/dsp has a
> consistent ABI on a ton of systems. The API below it, varies. Linux got
> file_operations and ALSA. Solaris/BSD may have its
> vnode-and-so-on-functions and some sort of OSS.

I think this is a poor example as applications lose a lot of
functionality (multiple stream mixing, software volume control, etc)
by going through the legacy /dev/dsp interface vs. using native ALSA.

Lee