linux-kernel - Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels

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Message-ID: <CAOJsxLG6kyq-RoQiBj0B_tThvOy1AxJf6XB2VfQFQJkwQ5cHcQ@mail.gmail.com>
Date:	Sun, 6 Nov 2011 20:58:20 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	"Ted Ts'o" <tytso@....edu>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Avi Kivity <avi@...hat.com>, Pekka Enberg <penberg@...nel.org>,
	"kvm@...r.kernel.org list" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	qemu-devel Developers <qemu-devel@...gnu.org>,
	Alexander Graf <agraf@...e.de>,
	Blue Swirl <blauwirbel@...il.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels

On Sun, Nov 6, 2011 at 8:54 PM, Pekka Enberg <penberg@...nel.org> wrote:
>> So integrating kvm-tool into the kernel isn't going to work as a free
>> pass to make non-backwards compatible changes to the KVM user/kernel
>> interface.  Given that, why bloat the kernel source tree size?
>
> Ted, I'm confused. Making backwards incompatible ABI changes has never
> been on the table. Why are you bringing it up?

And btw, KVM tool is not a random userspace project - it was designed
to live in tools/kvm from the beginning. I've explained the technical
rationale for sharing kernel code here:

https://lkml.org/lkml/2011/11/4/150

Please also see Ingo's original rant that started the project:

http://thread.gmane.org/gmane.linux.kernel/962051/focus=962620

                        Pekka
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