linux-kernel - Re: Xen & VMI?

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Message-ID: <20070306212037.GB31568@elte.hu>
Date:	Tue, 6 Mar 2007 22:20:37 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	"Nakajima, Jun" <jun.nakajima@...el.com>,
	virtualization <virtualization@...ts.osdl.org>,
	Roland McGrath <roland@...hat.com>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Jan Beulich <jbeulich@...ell.com>
Subject: Re: Xen & VMI?


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> > so trying to argue as if there was no ABI imposed on Linux by hiding 
> > the Xen ABI behind paravirt_ops, and whistling into the air as if 
> > nothing happened is misguided at best.
> 
> How is the situation even slightly different with a unified hypervisor 
> ABI?

1 sane ABI instead of 4 parallel ones? It's the same difference as the 
difference between 300 system calls and 1200 system calls. Alot more 
focus, alot more integration, alot less pain. Every time i change a 
detail in Linux i have to update (and think about) 1 virtualization 
aspect - not 4 (or more).

	Ingo
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