linux-kernel - Re: ABI coupling to hypervisors via CONFIG

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Message-ID: <75b66ecd0703091450l26bdc12es4091018f2d87f0d3@mail.gmail.com>
Date:	Fri, 9 Mar 2007 17:50:29 -0500
From:	"Lee Revell" <rlrevell@...-job.com>
To:	"Jan Engelhardt" <jengelh@...ux01.gwdg.de>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Jeremy Fitzhardinge" <jeremy@...p.org>,
	"Zachary Amsden" <zach@...are.com>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"john stultz" <johnstul@...ibm.com>, akpm@...ux-foundation.org,
	LKML <linux-kernel@...r.kernel.org>,
	"Rusty Russell" <rusty@...tcorp.com.au>, "Andi Kleen" <ak@...e.de>,
	"Chris Wright" <chrisw@...s-sol.org>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Subject: Re: ABI coupling to hypervisors via CONFIG_PARAVIRT

On 3/9/07, Jan Engelhardt <jengelh@...ux01.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
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