linux-kernel - Re: [Xen-devel] Re: [GIT PULL] Xen APIC hooks (with io_apic

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Message-ID: <de76405a0905270314x43ba3f77uae80676c4a83f0cd@mail.gmail.com>
Date:	Wed, 27 May 2009 11:14:30 +0100
From:	George Dunlap <George.Dunlap@...citrix.com>
To:	Gerd Hoffmann <kraxel@...hat.com>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Avi Kivity <avi@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Keir Fraser <keir.fraser@...citrix.com>
Subject: Re: [Xen-devel] Re: [GIT PULL] Xen APIC hooks (with io_apic_ops)

On Tue, May 26, 2009 at 10:19 PM, Gerd Hoffmann <kraxel@...hat.com> wrote:
> Well.  Xen *does* suffer from bad technical choices made years ago.  I'm
> pretty sure Xen would look radically different when being rewritten from
> scratch today.

That may be.  I don't know enough about the specific issues you raise
below to comment.  But Ingo wasn't bringing up those issues: he was
disagreeing with the whole idea of including dom0 Linux as a key
component of the Xen system.  If the Xen project were to start over
from scratch, we might make a lot of different decisions; but running
Linux as the hypervisor (as KVM does) or forking Linux (as Ingo seemed
to suggest) are not among them.

 -George
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